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Littérature scientifique sur le sujet « Polymer aqueous solution »

Auteur : Grafiati
Publié le 28 janvier 2024

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Articles de revues sur le sujet "Polymer aqueous solution"

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Panda, Manorama, et Mohammad Kamil. « Polymer-Amphiphile Interactions : An Overview ». Eurasian Chemico-Technological Journal 19, no 2 (30 juin 2017) : 99. http://dx.doi.org/10.18321/ectj643.

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Interactions between the polymers and amphiphiles in aqueous solutions have generated considerable interest among researchers because of the widespread applications, relatively complex behavior and improved physicochemical properties of the mixtures. Numerous studies on the surfactant-polymer systems have been carried out in recent years and the number of scientific reports has considerably increased. Various applications of polymers in different areas and many works concerning the amphiphiles are being published every year. Usually, the mixed systems containing polymers and amphiphiles show solution properties different from those of individual solutions due to interaction between the components. The present review article mainly focuses on the behaviour of polymers in aqueous solutions, in the absence or presence of amphiphiles, such as surfactants, drugs, etc. It also summarizes effect of the nature of amphiphiles on aggregation properties of polymers in aqueous solution, and interaction of conventional as well as gemini surfactants with polymers.
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Hu, Xiao Yu, et Ying Bo Chen. « Adsorption Properties of Chemical Crosslinked Polymer Gel ». Advanced Materials Research 87-88 (décembre 2009) : 22–26. http://dx.doi.org/10.4028/www.scientific.net/amr.87-88.22.

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Chemical crosslinker polymer gels were synthesized in situ polymerization of monomers in solvents with crosslinkers. Results showed that the solvent content of the polymer gels depended on the types of solvents and polymers as well as the crosslinkers. The adsorption ability to aromatic organic molecules of the polymer gels was measured by treating tryptophan solution containing phenol and pyrene aqueous solution. The aromatic compounds can be removed completely and no further pollution to the original solutions.
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Kuwahara, Y., Toshiki Miyazaki et Kawashita Masakazu. « Effect of Organic Polymer Addition on the Microstructure of Magnetite-Polymer Hybrid ». Key Engineering Materials 529-530 (novembre 2012) : 453–56. http://dx.doi.org/10.4028/www.scientific.net/kem.529-530.453.

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This study is concerning hybrid materials composed of the magnetite and the organic polymer such as dextran. They are useful for hyperthermia of cancer. In the preparation of this material, chemical structure or molecular weight of the added polymer is expected to affect ionic interaction between polymer and iron salts, and consequently the grain size and morphology of the prepared magnetite core. Therefore, we have synthesized magnetite-polymer hybrids using various polymers. Various polymers were dissolved in iron (II) chloride aqueous solution, and then NaOH aqueous solution was added to this mixed solution. As a result, in the case of neutral and cationic polymer crystalline magnetite was precipitated in the hybrid. On the other hand, in the case of anionic polyacrylic acid, lepidocrocite was precipitated rather than magnetite. It is known that the magnetite formation progresses through intermediate Fe (OH)2 formation and oxidation of the Fe (OH)2 by dissolved O2. Therefore it is considered that tight ionic interaction is constructed between the iron ions and the carboxyl group in the polyacrylic acid to form a complex, and the Fe (OH)2 formation is inhibited. When the hybrid was prepared by addition of NaOH aqueous solution to iron (II) chloride solution, and subsequent addition of the different polymers, magnetite formation was not inhibited irrespective of kind of polymer. The present results indicate that crystalline structure of the magnetite phase in magnetite-polymer hybrid is strongly affected by the chemical structure of polymer additives or the order of addition.
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Asada, Masahiko, Hisakazu Tanaka, Yukie Suwa, Sachiko Irifune, Shigehito Osawa et Hidenori Otsuka. « Tuning Pre-Solution of an Amphiphilic Polymeric Dispersant with Low Acid-Value toward Colored-Ink Preparation ». Applied Sciences 13, no 3 (31 janvier 2023) : 1834. http://dx.doi.org/10.3390/app13031834.

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Recently, a variety of amphiphilic block copolymers for water-based color inks as pigment dispersants have been developed. Although such dispersants require both high adsorption of pigments and dispersion-stability in water, the most crucial issue is the difficulty in controlling the affinity balance of the polymeric dispersants between the pigments and aqueous media. Therefore, it is important to increase the solubility of the hydrophobic polymers with low acid-value for ink design. Amphiphilic block copolymers containing styrene-based blocks as hydrophobic segments and methacrylic acid blocks as hydrophilic segments were prepared. The polymers with low acid-value could not dissolve in the alkaline solution directly. They could dissolve in methyl-ethyl-ketone (MEK) at room temperature and diethylene glycol (DEG), with heating. Polymer aqueous solutions were successfully prepared using polymer solutions in DEG as the pre-solutions. Because they were also unable to dissolve directly even in an alkaline solution containing DEG, the existence of DEG is not important, but the process employing the pre-solution is important. The influence of pre-solution viscosity on solubility in water was evaluated. The result suggests that the high viscosity of the DEG solution would work to slowly disperse the polymers in the alkaline solution, efficiently converting polymers into an aqueous soluble state, owing to there being enough time for the neutralization of the carboxylic acids of the polymers. Note that in the pre-solution of a lower concentration, the aqueous solution did not become clear, and the larger particle sizes were detected. These results showed that the viscosity of the pre-solution is an essential factor in solubilization in water. Using this method, the polymeric dispersants with low hydrophilicity were well dissolved in water, up to a high concentration.
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Riaya, Ascencion, Montgomery T. Shaw et Andrew Garton. « Oxidation of Elastomers in Aqueous Environments ». Rubber Chemistry and Technology 67, no 5 (1 novembre 1994) : 775–85. http://dx.doi.org/10.5254/1.3538709.

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Abstract Crosslinked 1,4-poly butadiene (BR) and styrene-butadiene rubber (SBR) were oxidized in various ionic environments (water, neutral salt solutions, acidic and basic buffers). The acceleration of oxidation when the elastomer was immersed in neutral and basic aqueous solutions, compared to dry air, is consistent with nucleophilic attack by peroxy anions on polymer hydroperoxides to give free radicals capable of initiating further oxidation. Acidic solutions retarded oxidation, compared to air, presumably because of decomposition of hydroperoxides to nonradical products. This phenomenon is in addition to the well-known effects of extraction of antioxidants by liquid media, and the accelerating effect of transition metal ions. The accelerating effect of basic solutions was greatest at the polymer surface, providing an inexpensive route to surface modification of elastomers. As an example, scrap rubber crumb was treated with aqueous alkaline hydrogen peroxide solution or sodium hypochlorite solution and evaluated as an impact modifier for brittle polymers.
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Kanta Sharker, Komol, Yuki Ohara, Yusuke Shigeta, Shinji Ozoe et Shin-ichi Yusa. « Upper Critical Solution Temperature (UCST) Behavior of Polystyrene-Based Polyampholytes in Aqueous Solution ». Polymers 11, no 2 (4 février 2019) : 265. http://dx.doi.org/10.3390/polym11020265.

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Strong polyampholytes comprising cationic vinylbenzyl trimethylammonium chloride (VBTAC) bearing a pendant quaternary ammonium group and anionic sodium p-styrenesulfonate (NaSS) bearing a pendant sulfonate group were prepared via reversible addition-fragmentation chain-transfer polymerization. The resultant polymers are labelled P(VBTAC/NaSS)n, where n indicates the degree of polymerization (n = 20 or 97). The percentage VBTAC content in P(VBTAC/NaSS)n is always about 50 mol%, as revealed by 1H NMR measurements, meaning that P(VBTAC/NaSS)n is a close to stoichiometrically charge-neutralized polymer. Although P(VBTAC/NaSS)n cannot dissolve in pure water at room temperature, the addition of NaCl or heating solubilizes the polymers. Furthermore, P(VBTAC/NaSS)n exhibits upper critical solution temperature (UCST) behavior in aqueous NaCl solutions. The UCST is shifted to higher temperatures by increasing the polymer concentration and molecular weight, and by decreasing the NaCl concentration. The UCST behavior was measured ranging the polymer concentrations from 0.5 to 5.0 g/L.
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Shima, A., T. Tsujino, H. Nanjo et N. Miura. « Cavitation Damage in Polymer Aqueous Solutions ». Journal of Fluids Engineering 107, no 1 (1 mars 1985) : 134–38. http://dx.doi.org/10.1115/1.3242431.

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Cavitation damage tests in polymer solutions are made with a vibratory cavitation apparatus. It is possible for this device to suppress the degradation of polymer by ultrasonic cavitation. Polymer solutions used are 100 wppm, 500 wppm, and 1000 wppm solutions of Polyox. The weight loss in 100 wppm Polyox solution is larger than that in water, but in 500 wppm and 1000 wppm Polyox solutions the weight losses after 60 min exposure to cavitation are relatively small. It is indicated that the cavitation damage in polymer solutions is subject to the effective influence of elastic properties of liquids.
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Kancharla, Samhitha, Nathan A. Zoyhofski, Lucas Bufalini, Boris F. Chatelais et Paschalis Alexandridis. « Association between Nonionic Amphiphilic Polymer and Ionic Surfactant in Aqueous Solutions : Effect of Polymer Hydrophobicity and Micellization ». Polymers 12, no 8 (15 août 2020) : 1831. http://dx.doi.org/10.3390/polym12081831.

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The interaction in aqueous solutions of surfactants with amphiphilic polymers can be more complex than the surfactant interactions with homopolymers. Interactions between the common ionic surfactant sodium dodecyl sulfate (SDS) and nonionic amphiphilic polymers of the poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (PEO-PPO-PEO) type have been probed utilizing a variety of experimental techniques. The polymer amphiphiles studied here are Pluronic F127 (EO100PO65EO100) and Pluronic P123 (EO19PO69EO19), having the same length PPO block but different length PEO blocks and, accordingly, very different critical micellization concentrations (CMC). With increasing surfactant concentration in aqueous solutions of fixed polymer content, SDS interacts with unassociated PEO-PPO-PEO molecules to first form SDS-rich SDS/Pluronic assemblies and then free SDS micelles. SDS interacts with micellized PEO-PPO-PEO to form Pluronic-rich SDS/Pluronic assemblies, which upon further increase in surfactant concentration, break down and transition into SDS-rich SDS/Pluronic assemblies, followed by free SDS micelle formation. The SDS-rich SDS/Pluronic assemblies exhibit polyelectrolyte characteristics. The interactions and mode of association between nonionic macromolecular amphiphiles and short-chain ionic amphiphiles are affected by the polymer hydrophobicity and its concentration in the aqueous solution. For example, SDS binds to Pluronic F127 micelles at much lower concentrations (~0.01 mM) when compared to Pluronic P123 micelles (~1 mM). The critical association concentration (CAC) values of SDS in aqueous PEO-PPO-PEO solutions are much lower than CAC in aqueous PEO homopolymer solutions.
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Novoskoltseva, Olga A., Andrey A. Belov, Nataliya G. Loiko, Yury A. Nikolaev, Irina G. Panova et Alexander A. Yaroslavov. « Biodegradable Interpolycomplexes for Anti-Erosion Stabilization of Soil and Sand ». Polymers 14, no 24 (8 décembre 2022) : 5383. http://dx.doi.org/10.3390/polym14245383.

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A linear anionic polysaccharide, sodium alginate, electrostatically interacts with a cationic polysaccharide, quaternized hydroxyethyl cellulose ethoxylate, in aqueous solution, thus giving an interpolyelectrolyte complex. Aqueous solutions of the initial polysaccharides and polycomplexes with an excess of the cationic or anionic polymers were used for the stabilization of soil and sand against water erosion. Physicochemical, mechanical and biological properties of the polymers and coatings were characterized by gravimetric analysis, viscosimetry, mechanical strength assessment, cell viability, and cell-mediated degradation with the following main conclusions. (a) Non-stoichiometric polycomplexes with an excess of cationic or anionic units (“cationic” and “anionic” polycomplexes, respectively) form transparent solutions or stable-in-time dispersions. (b) The complexation results in a decrease in the viscosity of polymer solutions. (c) A complete dissociation of polycomplexes to the initial components is achieved in a 0.2 M NaCl solution. (d) Soil/sand treatment with 1 wt% aqueous solutions of polymers or polycomplexes and further drying lead to the formation of strong composite coatings from polymer(s) and soil/sand particles. (e) Cationic polycomplexes form stronger coatings in comparison with anionic polycomplexes. (f) The polymer–soil coatings are stable towards re-watering, while the polymer–sand coatings show a much lower resistance to water. (g) The individual polysaccharides demonstrate a negligible toxicity to Gram-negative and Gram-positive bacteria and yeast. (h) The addition of Bacillus subtilis culture initiates the degradation of the polysaccharides and polycomplexes. (i) Films from polysaccharides and polycomplexes decompose down to small fragments after being in soil for 6 weeks. The results of the work are of importance for constructing water-resistant, low toxicity and biodegradable protective coatings for soil and sand.
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Huang, Hui, Jun Wei Wang, Yi Fan Fan et Shi Ying Tao. « Adsorption Behavior of β-Cyclodextrin Polymer to Phenol in Aqueous Solution ». Advanced Materials Research 554-556 (juillet 2012) : 177–80. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.177.

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Removal of low concentration of phenol from aqueous solutions through the adsorption process by using crosslinked β-Cyclodextrin polymer (β-CD polymer) was investigated. The effects of contact time, sodium chloride content, contact temperature and initial concentration of phenol in the aqueous on adsorption capacity were evaluated through a series of batch experiments. The results show that β-CD polymer on the adsorption of phenol balanced after 6h. The adsorption process was apparently influenced by sodium chloride content, contact temperature and initial phenol concentration in aqueous solution. The adsorption behavior for phenol of β-CD polymer is fitted into the Freundlich isotherm.
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Thèses sur le sujet "Polymer aqueous solution"

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Suzuki, Shinya. « Rheological Properties of Telechelic Associative Polymer in Aqueous Solution ». 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/200500.

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Sidhu, Jagraj. « Equilibrium and structural studies of polymer / surfactant assemblies in aqueous solution ». Thesis, University of Salford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420463.

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Piluso, Pierre. « Développement de nouvelles formulations à base de polymères fonctionnels pour la mise au point de papiers techniques à propriétés spécifiques ». Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1090.

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Cette thèse a consisté à étudier la réaction d'acétalisation en milieu aqueux de l'alcool polyvinylique (PVA) par un aldéhyde non hydrosoluble à longue chaîne alkyle (10-14 carbones) porteur d'une fonctionnalité vinyle en bout de chaîne, pour des conditions spécifiques : concentration en polymère de 8 % massique et degrés d'acétalisation (DA) faibles (<5,6 mol%). L'objectif de cette réaction de greffage est l'obtention de films obtenus par évaporation de solvant ayant une fonctionnalité de surface. L'influence des paramètres de réaction (concentration en réactifs, pH) sur la cinétique a été étudiée sur un composé modèle, le pentane-2,4-diol, puis sur le PVA. Une méthode de dosage par RMN 1H a permis d'identifier et de quantifier les composés en présence dans le milieu de réaction.Un objectif de la thèse a été de maximiser le DA en conservant une viscosité adéquate pour un procédé d'enduction. Pour cela, l'impact du greffage par le 10-undécénal sur l'organisation et les propriétés rhéologiques des solutions d'un PVA référence à 8 % massique a été étudié en premier lieu jusqu'à un DA de 1,85 mol%. Une méthode de quantification de faibles quantités de groupements vinyle en surface des films de PVA acétalisé a permis d'étudier leur orientation en surface pour une gamme de DA de 0 à 1,48 mol%.L'influence de la masse molaire du PVA et de la longueur de chaîne alkyle de l'aldéhyde sur la cinétique d'acétalisation et son impact sur la viscosité des solutions ont également été étudiés. L'utilisation d'un PVA de masse molaire plus faible apparait être un moyen efficace de maximiser le DA tout en conservant une viscosité acceptable pour un procédé d'enduction
This PhD work dealt with the study of the acetalization reaction of polyvinyl alcohol (PVA) in aqueous medium by non-water soluble aldehydes bearing long alkyl chains and a vinyl end group such as 10-undecenal in specific conditions: in 8 wt% concentrated PVA solutions and with low acetalization degree (AD) from 0.33 mol% to 5.6 mol%. The main purpose of this grafting reaction is to obtain an activated surface on water casted polymer films. First, the impact of reactants concentrations, pH and reaction atmosphere on the acetalization kinetics was studied with a model compound first, pentane-2,4-diol, then with PVA. A new 1H NMR titration method allowed to carry out in situ quantification of the amount of reactant and of grafted aldehyde.On main objectives of this work was to obtain the highest DA while keeping PVA solutions viscosity as low as possible to keep a sufficiently low solution viscosity for a solvent cast process. The impact of AD by 10-undecenal on PVA solution organization and on the rheological properties of 8 wt% PVA aqueous solutions were investigated first until 1.85 mol% AD. A surface vinyl groups quantification method was developed through chemical labeling of the vinyl groups at the surface of solvent casted PVA films and 1H NMR titration of the labels. This method allowed the study of vinyl groups orientation toward the surface of acetalized PVA films until 1.48 mol% AD.The influence of PVA molar mass and of aldehyde alkyl chain length on acetalization kinetics and solutions viscosity was also studied. The use of a low molar mass polymer appeared to be an efficient way to obtain highly modified films while keeping a low 8 wt% acetalized PVA solution viscosity
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Lower, Russell John. « The reactions of free and polymer-bound iron(III) porphyrins with tertiary-butyl hydroperoxide in aqueous solution ». Thesis, University of York, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292604.

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Orpiszak, Martin. « Oxidation of cellulose to favour its dissolution in alkaline aqueous solution before regeneration into textile yarn ». Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296556.

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Detta examensarbete är en del av CelluFil-projektet och syftar till att optimera förhållandena för upplösning av cellulosa i vattenlösning av natriumhydroxid följd av regenering i form av ett garn. Tidigare arbeten har visa tatt cellulosa kan lösas i vattenlösning vid -10°C, men sådana förhållanden är inte tillämpliga i industriell skala. Målet med detta projekt är att arbeta vid rumstemperatur.  För detta kommer karboxylgrupper att införas i cellulosakedjorna för att öka cellulosans lighet i ett alkaliskt vattenbaserat medium. Därefter kommer cellulosan att fällas ut igen i en sur lösning. Natriumperjodat gör det möjligt att oxidera alkoholgrupperna i cellulosakedjan på C2- och C3- positionerna genom att öppna glukosenheterna för att skapa två karbonylfunktioner (aldehyde) som sedan lätt kan oxideras till karboxylgrupper med överoxidering med natriumklorit.  Den första delen av rapporten är tillägnad litteraturöversikten om ämnet med focus på natriumperjodat oxidation. Därefter föreslås ett allmänt protokoll från natriumperjodat oxidation till regenering av cellulosa till garn i en svavelsyralösning. Flera förhållanden för natriumperjodat oxidationen testas vid olika temperaturer, med eller utan metallsalter och med olika oxidationsdoser.  Upplösningsutbytet är direkt kopplat till karboxylinnehållet infört i cellulosakedjorna. Periodatoxidationen leder också till minskningen av polymerisationsgraden men cellulosas DPv förblir tillräckligt hög med det riktade COOH-innehållet och för textilapplikationer. Den möjliga produktionen av hydroxylradikaler under natriumperjodat oxidationen har undersökts med EPR/Spin-trapping. Endast försök gjorda med UV-strålning visade OH°. Således förklaras fortfarande inte depolymerisationen av cellulosa under perjodat oxidation framställd under mörka förhållanden. Eftersom, konsumtion av natriumperjodat är låg under oxidationen är dess återvinning en nyckelfråga för en industriell applikation. Det har visat sig att oxidationsfiltraten kan återanvändas flera gånger före total konsumtion av periodat. Kvaliteten på celluloser oxiderade med återvunna filtrat, särskilt deras upplösningsförmåga, bör kontrolleras.
This master thesis is part of the Cellufil Project and aims to optimize the conditions for dissolving cellulose in aqueous sodium hydroxide solution followed by regeneration it in the form of a yarn. Previous works have shown that cellulose could be dissolved in soda at -10°C, but such conditions are not applicable at industrial scale. The objective of the present project is to work at room temperature.  For that, carboxyl groups will be introduced in the cellulose chains in order to increase cellulose solubility in an alkaline aqueous medium, after this it is reprecipitated it in acidic solutions. Periodate makes it possible to oxidize the alcohol groups of cellulose on C2 and C3 positions by opening the glucose units to create two carbonyls functions (aldehyde) which can then be easily oxidized into carboxylic groups with overoxidation using sodium chlorite. A first part of the report is dedicated to the literature review on the subject, focusing on periodate oxidation. Then, a general protocol is proposed from the periodate oxidation to the regeneration of cellulose into yarn in sulfuric acid solutions. Several conditions for the periodate oxidation are tested, at different temperatures, with or without metal salts and with different oxidant dosages.  The dissolution yield is directly linked to the carboxyl content introduced in the cellulose chains. The periodate oxidation also leads to the decrease of the cellulose degree of polymerization but cellulose DPv still remains sufficiently high in the case of the targeted COOH contents and for textile applications. The possible production of hydroxyl radicals during the periodate oxidation has been investigated by EPR/Spin-trapping. Only trials made with UV radiations showed OH°. Thus, cellulose depolymerization during periodate oxidation made in dark conditions is still not explained. Because the periodate consumption is low during the oxidation, its recycling is a key issue for an industrial application. It has been shown that the oxidation filtrates could be reused several times before total oxidant consumption. The quality of celluloses oxidized with recycled filtrates, especially their dissolving ability, should be checked.
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Roure, Isabelle. « Rhéologie et dimensions des chaines du hyaluronane en solution ». Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10227.

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Dans ce travail, nous avons cherche a relier le comportement rheologique des solutions de hyaluronane (ha) et de son derive reticule le hylane, aux dimensions des chaines. Dans une premiere partie nous avons etudie l'influence de la force ionique sur la viscosite des solutions et sur la separation en masse molaire par chromatographie d'exclusion sterique (sec). Nous montrons que la contribution du ha a la force ionique correspond a celle d'un electrolyte simple. L'obtention a de faibles forces ioniques d'un maximum dans la courbe viscosite reduite en fonction de la concentration en polymere a ete interpretee a partir des theories des polyelectrolytes. Ceci nous a permis de mieux comprendre le role des interactions electrostatiques. L'utilisation de la sec couplee a trois detecteurs en fonction de la force ionique de l'eluant nous a permis de definir l'influence de la force ionique sur la separation, de valider la loi d'etalonnage universelle. La comparaison des variations experimentales de et rg en fonction de la masse obtenues par sec avec celles obtenues theoriquement permet de determiner la longueur de persistance intrinseque du ha egale a 70a. Dans une deuxieme partie, nous avons montre que la variation de la viscosite specifique des solutions de ha suivait une loi en c dans le regime dilue et en cm dans le regime semi-dilue. A partir de la variation des viscosites avec la temperature nous avons caracterise trois domaines dans le regime semi-dilue. Le domaine intermediaire est caracterise par une diminution de l'influence de la temperature sur la viscosite. Nous avons attribue cette diminution (qui est fonction du produit cm) a une augmentation de la rigidite des chaines de ha. Enfin, nous montrons dans la derniere partie que le comportement rheologique du hylane en solution correspondrait, s'il etait possible de le synthetiser, a celui d'un ha de tres forte masse molaire, conditions qui favorisent particulierement les proprietes viscoelastiques.
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Wehbe, Elsy. « Magnetohydrodynamic of a non-newtonien fluid ». Electronic Thesis or Diss., Pau, 2023. https://theses.hal.science/tel-04421152.

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La magnétohydrodynamique (MHD) est la discipline qui étudie le comportement des fluides conducteurs d'électricité lorsque leur mouvement est couplé au champ électromagnétique. Ici, nous étudions dans un domaine possiblement multi connexe dans 2D, l'existence des solutions pour un problème MHD couplant une équation de solution aqueuse de polymères avec l'équation de Maxwell de l'électromagnétisme. Pour résoudre notre problème, nous avons besoin de certaines estimations liées au problème associé de Stokes. L'une des difficultés réside dans la géométrie du domaine et le terme non linéaire d'ordre trois $(u cdot nabla)(u-alpha Delta u)$. D'autre part, il est démontré qu'il existe une régularité supplémentaire dans $W^{2,p}(O)$ pour le champ magnétique
Magnetohydrodynamics (MHD) is the discipline studying the behavior of conductive fluids of electricity when their movement is coupled to the electromagnetic field. Here we study in $Omega$, a possibly multi-connected two-dimensional domain, the existence of solutions for an MHD coupling an equation of polymer aqueous solution with Maxwell equation of electromagnetic. To solve our problem we need some estimations related to the Stokes-associated problem. One of the difficulties is the geometry of the domain and the nonlinear term of third order $(u cdot nabla)(u-alpha Delta u)$. On the other hand, it is shown an additional regularity in $W^{2,p}(O)$ for the magnetic field
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Bataille, Isabelle. « Propriétés associatives en solution aqueuse de dérivés alkylés de carboxyméthylpullulanes ». Rouen, 1998. http://www.theses.fr/1998ROUES013.

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Le pullulane est un polysaccharide de fermentation caractérisé par un squelette neutre, hydrosoluble et flexible. Des dérivés anioniques et amphiphiles du pullulane ont été préparés par carboxyméthylation (0,76
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Anim-Danso, Emmanuel. « Understanding the structure of water, ice, and aqueous solutions next to solid surfaces ». University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1441318237.

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Boutebba, Abdelkader. « Propriétés du succinoglycane : transition conformationnelle et gélification en milieu aqueux ». Université Joseph Fourier (Grenoble ; 1971-2015), 1998. http://www.theses.fr/1998GRE10136.

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Le succinoglycane est un polysaccharide charge d'origine bacterienne qui presente en solution aqueuse une transition conformationnelle ordre-desordre. La premiere partie de ce travail a porte sur l'etude de cette transition. Nous avons precise, a partir des proprietes polyelectrolytes, que la conformation ordonnee etait une simple helice. Nous avons montre le role particulier des substituants charges succinate sur la stabilite de cette helice. Quelle que soit la quantite de groupements succinate presents, l'enthalpie de transition par unite repetitive reste constante, ce qui montre que la contribution non polyelectrolyte a cette enthalpie est preponderante. Dans la deuxieme partie, nous avons cherche a comprendre l'origine et le mecanisme de la formation d'associations interchaines. Ces associations peuvent etre deja presentes dans la conformation native du polymere. Elles sont supprimees lors d'un premier passage au-dela de la temperature conformationnelle lorsque le parametre de recouvrement c est inferieur a 8. Pour des valeurs superieures, de nouvelles associations se forment de facon reversible lors de la transition desordre-ordre qui conduisent a la formation d'un gel faible et elastique. Une cinetique lente de stabilisation de ces associations est observee. Elles deviennent alors progressivement stables au-dela de tm mais semblent impliquer moins de 5% des segments des chaines. Dans la troisieme partie, les proprietes rheologiques des solutions ont ete etudiees. Nous avons retrouve, en absence d'associations, le comportement normal de solutions de polymeres et mis en evidence, dans certaines conditions, la formation d'associations intermoleculaires. L'influence de la temperature a ete reliee a la rigidite des chaines et a l'aptitude de ce polymere a former des associations interchaines.
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Livres sur le sujet "Polymer aqueous solution"

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1949-, Jönsson Bo, dir. Surfactants and polymers in aqueous solution. Chichester : John Wiley & Sons, 1998.

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1946-, Holmberg Krister, dir. Surfactants and polymers in aqueous solution. 2e éd. Chichester, West Sussex, England : John Wiley & Sons, 2003.

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Center, Lewis Research, dir. Effects of surface area, polymer char, oxidation, and NiO additive on nitridation kinetics of silicon powder compacts. [Cleveland, Ohio] : National Aeronautics and Space Administration, Lewis Research Center, 1998.

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CRC handbook of phase equilibria and thermodynamic data of aqueous polymer solutions. Boca Raton, FL : Taylor & Francis, 2012.

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Kostyukov, Viktor. Molecular mechanics of biopolymers. ru : INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1010677.

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The monograph is devoted to molecular mechanics simulations of biologically important polymers like proteins and nucleic acids. It is shown that the algorithms based on the classical laws of motion of Newton, with high-quality parameterization and sufficient computing resources is able to correctly reproduce and predict the structure and dynamics of macromolecules in aqueous solution. Summarized the development path of biopolymers molecular mechanics, its theoretical basis, current status and prospects for further progress. It may be useful to researchers specializing in molecular Biophysics and molecular biology, as well as students of senior courses of higher educational institutions, studying the biophysical and related areas of training.
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CRC handbook of enthalpy data of polymer-solvent systems. Boca Raton, FL : Taylor & Francis, 2006.

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Aqueous two-phase partitioning : Physical chemistry and bioanalytical applications. New York : M. Dekker, 1995.

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Jönsson, Bo, Björn Lindman, Bengt Kronberg et Krister Holmberg. Surfactants and Polymers in Aqueous Solution. Wiley & Sons, Incorporated, John, 2000.

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Kronberg, Bengt, Krister Holmberg, Bo J¿nsson et Bj¿ Lindman. Surfactants and Polymers in Aqueous Solution. Wiley & Sons, Incorporated, John, 2018.

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Jonsson, Bo, Bengt Kronberg, Krister Holmberg et Bjö Lindman. Surfactants and Polymers in Aqueous Solution. Wiley & Sons, Incorporated, John, 2003.

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Chapitres de livres sur le sujet "Polymer aqueous solution"

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Buchhammer, Heide-M., Mandy Mende et Marina Oelmann. « Preparation of monodisperse polyelectrolyte complex nanoparticles in dilute aqueous solution ». Dans Aqueous Polymer Dispersions, 98–102. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b12146.

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Buchhammer, Heide-M., Mandy Mende et Marina Oelmann. « Preparation of monodisperse polyelectrolyte complex nanoparticles in dilute aqueous solution ». Dans Aqueous Polymer Dispersions, 98–102. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-36474-0_20.

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Fong, D. W., et D. J. Kowalski. « Chemical Modification of Acrylamide Polymers in Aqueous Solution ». Dans Polymer Modification, 77–83. Boston, MA : Springer US, 1997. http://dx.doi.org/10.1007/978-1-4899-1477-4_7.

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Hemker, David J., Kookheon Char, Hideko T. Oyama, Alice P. Gast et Curtis W. Frank. « Macromolecular Complex Formation and Polymer Adsorption on Colloidal Particles in Aqueous Solution ». Dans Polymers in Aqueous Media, 263–84. Washington, DC : American Chemical Society, 1989. http://dx.doi.org/10.1021/ba-1989-0223.ch013.

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Shogren, R. L., A. M. Jamieson et J. Blackwell. « Studies of PSM in Aqueous Solution Near the Overlap Concentration ». Dans Microdomains in Polymer Solutions, 211–22. Boston, MA : Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2123-1_12.

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Gilányi, T., et E. Wolfram. « Complex Formation between Ionic Surfactants and Polymers in Aqueous Solution ». Dans Microdomains in Polymer Solutions, 383–405. Boston, MA : Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2123-1_22.

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Siband, Elodie, Yvette Tran et Dominique Hourdet. « pH- and Thermo-responsive Polymer Assemblies in Aqueous Solution ». Dans Trends in Colloid and Interface Science XXIII, 19–22. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13461-6_5.

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Hellweg, Thomas. « Block Copolymer Surfactant Mixtures in Aqueous Solution : Can we Achieve Size and Shape Control by Co-Micellization ? » Dans Advances in Polymer Science, 1–27. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/12_2010_66.

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Fallah, Zari, Hossein Nasr Isfahani et Mahmood Tajbakhsh. « Adsorption Behavior of Cyclodextrin-Triazole-Titanium Based Nanocomposite for Heavy Metal Ions from Aqueous Solution ». Dans Eco-friendly and Smart Polymer Systems, 259–63. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45085-4_62.

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Sato, Koji, Daisuke Onodera, Mitsuhiro Hibino et Takeshi Yao. « Development of Bioactive Organic Polymer Coated with Ceramic Thin Films Synthesized from Aqueous Solution ». Dans Bioceramics 18, 771–74. Stafa : Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-992-x.771.

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Actes de conférences sur le sujet "Polymer aqueous solution"

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Lee, Sang Goo, Jong-Wook Ha et Bong Jun Chang. « Amine-functionalized macroporous microspheres for HF removal from aqueous solution ». Dans PROCEEDINGS OF PPS-31 : The 31st International Conference of the Polymer Processing Society – Conference Papers. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4942340.

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Chaabi, Omar, Emad W. Al-Shalabi et Waleed Alameri. « A Numerical Investigation of Low Salinity Polymer Flooding Effects from a Geochemical Perspective ». Dans Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31191-ms.

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Abstract Low salinity polymer (LSP) flooding is getting more attention due to its potential of enhancing both displacement and sweep efficiencies. Modeling LSP flooding is challenging due to the complicated physical processes and the sensitivity of polymers to brine salinity. In this study, a coupled numerical model has been implemented to allow investigating the polymer-brine-rock geochemical interactions associated with LSP flooding along with the flow dynamics. MRST was coupled with the geochemical software IPhreeqc. The effects of polymer were captured by considering Todd-Longstaff mixing model, inaccessible pore volume, permeability reduction, polymer adsorption as well as salinity and shear rate effects on polymer viscosity. Regarding geochemistry, the presence of polymer in the aqueous phase was considered by adding a new solution specie and related chemical reactions to PHREEQC database files. Thus, allowing for modeling the geochemical interactions related to the presence of polymer. Coupling the two simulators was successfully performed, verified, and validated through several case studies. The coupled MRST-IPhreeqc simulator allows for modeling a wide variety of geochemical reactions including aqueous, mineral precipitation/dissolution, and ion exchange reactions. Capturing these reactions allows for real time tracking of the aqueous phase salinity and its effect on polymer rheological properties. The coupled simulator was verified against PHREEQC for a realistic reactive transport scenario. Furthermore, the coupled simulator was validated through history matching a single-phase LSP coreflood from the literature. This paper provides an insight into the geochemical interactions between partially hydrolyzed polyacrylamide (HPAM) and aqueous solution chemistry (salinity and hardness), and their related effect on polymer viscosity. This work is also considered as a base for future two-phase polymer solution and oil interactions, and their related effect on oil recovery.
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Shapiro, E., D. Drikakis, J. Gargiuli et P. Vadgama. « Microfluidic Cell Optimization for Polymer Membrane Fabrication ». Dans ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96221.

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Dual-fluid laminar flow in microchannels can be utilised through microfabrication to create polymer membranes at the interface between aqueous and organic solutions. In order to enable smooth membrane growth it is necessary not only to maintain a stable interface between the aqueous and organic phase, but also to minimise near-wall stresses, which affect membrane attachment at the initial stages of membrane formation. The characteristics of the dual-fluid flow in the entrance region of the micro-channel can be significantly affected by the geometry of the inlet and flow rates involved. We present a numerical study of the effects of the inlet geometry on the flow development and near-wall stresses in xylene/water flows, which represent the initial stages of nylon 6,6 membrane formation on the interface between an aqueous solution of hexamethylenediamine and adipoyl chloride solution in xylene. The shape of the inlets considered here varies from a T-inlet (90 degrees inlet angles) to an M-inlet (0 degrees inlet angles). We show that although higher flow rates are needed in order to contain reagents to the narrow region near the interface, the increase of the flow rate leads to significant increase of the shear stresses with the maximum values being obtained in the entrance region thus preventing membrane attachment. CFD validation against experimental data for rhodamine diffusion broadening in a microfluidic is also presented.
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Tamano, S., et M. Itoh. « Unsteady Confined Swirling Flow of Polymer Solutions ». Dans ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16337.

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The unsteady swirling flow of an aqueous polymer solution due to a rotating disc in a cylindrical casing was investigated using flow visualization and particle image velocimetry (PIV) system. As the aqueous polymer solution, polyacrylamide (PAA) solutions whose concentrations were 0.025, 0.1, 0.2, 0.5, 0.8 and 1.0 wt% were used. We found a new phenomenon of vortex shedding in which the ring vortex formed near the center of rotating disc was periodically shed away from the rotating disc in the unsteady flow regime. It was found that the fluid within the ring vortex formed near the rotating disc rotates with semi-rigid rotation, where the angular velocity of ring vortex was about 0.9 times that of the rotating disc. A high shear layer existed at the boundary between the ring vortex and the outer large-scale secondary flow. Just after the ring vortex was shed, the surrounding large-scale secondary flow rushed into near the rotating axis, so that the strong axial flow was observed near the rotating axis.
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Joshi, D., N. K. Maurya et A. Mandal. « Evaluation of Synergetic Rheological Behaviour of Polymer and Silica Nanofluids for Enhanced Oil Recovery ». Dans SPE Annual Technical Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/217486-stu.

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Abstract Reservoirs with partially hydrolyzed polyacrylamide (PHPA) aqueous displacing injected fluids improve the amount of oil produced noticeably. However, the medium's temperature and salinity significantly impact the viscosity of these fluids, which is critical in specific reservoir conditions for oil recovery. Thus, adding nanomaterials in PHPA solutions to prepare nanofluids has been shown to be a promising alternative to increase viscosity and improve performance in enhanced oil recovery. The dispersion of NPs in the aqueous polymer solution was characterized by DLS and zeta-potential measurements for stability. The contact angle measurement was also performed of silica nanofluid for examining the ability to wettability alteration. In the rheological studies, it was observed that there was an improvement in the viscosity by adding Silica Nanoparticles in the polymeric solution by 20%. Along with the improvement, silica polymer nanofluid also reduces the viscosity losses at reservoir temperature over 28 days. The experimental results showed that Silica Core flooding experiments were performed to observe the synergetic efficacy of the nanofluids with polymer in barea sandstone core at 90°C. The Silica NPs Assisted Polymer EOR Agent exhibit superior stability characteristics, to a lesser extent, viscosity losses after ageing and good stability, which are desirable for functional application in enhanced oil recovery (EOR) processes, which was confirmed by the result of EOR core flooding with maximum Incremental Oil Recovery of 28 % after water flooding.
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Vaudey, Claire-Emilie, Sébastien Renou, Dennis Kelley, Chantal Cochaud et Roger Serrano. « Cadarache LOR (Liquides Organiques Radioactifs) Treatment by a Solidification Process Using NOCHAR Polymers ». Dans ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96298.

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In France, two options can be considered to handle the Very Low Level Waste (VLLW) and the Low Level Waste (LLW). The first one is the incineration at CENTRACO facility and the second one is the disposal at ANDRA sites. The waste acceptance in these two channels is dependent upon the adequacy between the waste characteristics (physical chemistry and radiological) and the channel specifications. If the waste characteristics and the channel specifications (presence of significant quantities of halogens, complexants agents, organic components… or/and high activity limits) are incompatible, an alternative solution have to be identify. It consists of a waste pre-treatment process. For Cadarache LOR (Liquides Organiques Radioactifs) waste streams, two radioactive scintillation cocktails have to be treated. They are composed of a mix of organic liquids and water: for the first one, 19 % of organic compounds (xylene, mesitylene, diphenyloxazole, TBP…) and 86.9 % of water, and for the second one, 23 % of organic compounds (TBP…) and 77 % of water. They contain halogens (chlorine and fluorine), complexants agents (nitrate, sulphate, oxalate and formate) and have got αβγ spectra with mass activities equal to some 100 Bq/g. Therefore, tritium is also present. As a consequence, in order for storage acceptance at the ANDRA site, it is necessary to pre-treat the waste. An adequate solution seems to be a solidification process using NOCHAR polymers. Indeed, NOCHAR polymers correspond to an important variety of products applied to the treatment of radioactive aqueous and organic liquids (solvent, oil, solvent/oil mixing …) and sludge through a mechanical and chemical solidification process. For Cadarache LOR, N910 and N960 respectively dedicated to the organic and aqueous liquids solidification are considered. With the N910, the organic waste solidification occurs in two steps. As the organic liquid travels moves through the polymer strands, the strands swell and immobilize the liquid. Then as the polymer-organic cure, over time, the polymer continues to collapse on the organic to create a permanent chemical bond. The N960 has the ability to absorb aqueous waste up to 100 times its own weight. It creates a strong mechanical bond which permanently traps the contamination imbedded in the aqueous liquids. Therefore, these two NOCHAR polymers seem to be able to constitute a suitable solidification matrix for a final acceptance in storage on ANDRA sites. In order to validate the solidification process using NOCHAR polymers as an acceptable solution for Cadarache LOR treatment, some solidification tests realised with N910 and N960, have been carried out for different Waste/Polymer ratios. To determine the best Waste/Polymer ratio and the optimal experimental parameters, exudation tests have been made. Indeed, the process prevents leaching and it results in the absence residual free organic or aqueous liquid which is forbidden in storage by ANDRA specifications. With these results, the obtained scientific data constitute a fundamental basis of an ANDRA agreement. As a conclusion, the aim of this study is to demonstrate that the pre-treatment by solidification using NOCHAR polymers can constitute a solution for Cadarache LOR handling and more generally, for various organic and mixed organic/aqueous waste which can not be directly acceptable at CENTRACO facility or at ANDRA storage sites. So then, this study is a solid background to demonstrate the feasibility of the waste pre-treatment by solidification with NOCHAR polymer and to encourage this process development.
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Cavadas, Adélio S., et Fernando T. Pinho. « Power Consumption of Polymer Solutions in a Stirred Vessel Powered by an Hyperboloid Impeller ». Dans ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/fed-24905.

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Abstract Measurements of power consumption in stirred vessel flows powered by a Rushton and an hyperboloid impeller were carried out. The fluids were aqueous solutions of tylose, CMC and xanthan gum at weight concentrations ranging from 0.1% to 0.6% and also included Newtonian fluids. For the Rushton turbine flows the addition of polymer increased the Newton number by about 13–20% at Reynolds numbers in the range 1,000–3,000, whereas with the hyperboloid impeller the Newton number decreased about 13%. This decrease was especially noticeable for the CMC solutions and was absent from the 0.2% tylose solution flow. Concentrated aqueous solutions of CMC (5.2%) and XG (3.6%) were also produced to determine the characteristic impeller parameter k for the hyperboloid, following the procedure of Metzner and Otto (1957) which was found to be 48 ±16.
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Zordão, Luis Henrique Pizetta, Lauralice de C. F. Canale et George E. Totten. « Investigation of Quenchants Based on Sodium Aqueous Ionic Solutions ». Dans HT2019. ASM International, 2019. http://dx.doi.org/10.31399/asm.cp.ht2019p0253.

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Abstract The mechanical properties of steel components are influenced by the microstructure, which is determined by the heat treatment cycle. In the quenching of the steel: water, oil, aqueous polymer solutions and aqueous salt solutions (brine) can be used as quenchants, which exhibit different characteristic cooling mechanisms. For example, when water is used as the cooling media, a stable vapor film is formed around the hot component resulting in nonuniformity of surface heat transfer during the cooling process, which is often responsible for distortion, and cracking. Using salt based on sodium (Na) as an additive forming a solution with distilled water was able to reduce or eliminate the vapor film, enhance the cooling rate and keep the heat flux in high values during the most part of the drop of the temperature that is better for a more homogeneous cooling. This work investigated the cooling performance of different salt solutions and quenching bath parameters (temperature and agitation). These analyses were made using cooling curves and heat flux to quantify the behavior and hardening power capacity of these salt solutions.
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Steindl, Johannes, Rafael Eduardo Hincapie, Ante Borovina, Christoph Puls, Johann Badstöber, Gerhard Heinzmann et Torsten Clemens. « Improved EOR Polymer Selection Using Field-Flow Fractionation ». Dans Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207700-ms.

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Abstract Various polyacrylamide polymers have been successfully applied in chemical EOR projects. These polymers are characterised by high molecular weights (MW) to achieve high viscosifying power. The molecular weight distribution (MWD) of the polymers has a major impact on polymer properties and performance. Measuring the molecular weight distribution is challenging using conventional methods. Field-Flow Fractionation (FFF) enables the determination of the distribution to select and quality check various polymers. Polymers with high molar masses (&gt; 1 MDa) are used for EOR to obtain highly viscous aqueous solutions. The MWD of the polymers is crucial for the solution characteristics. Conventional analysis of polymers is performed using either viscometry – which is able to determine the average MW but does not give information on MWD, or size-exclusion chromatography – which is restricted to molecular weights of &lt; 20 MDa. FFF is based on the analytes flowing at different speeds in a channel dependent on their size and mass. This effect leads to separation, which is then used to determine the MWD. FFF allows to determine the MW and MWD of various ultra-high molecular weight polyacrylamides (HPAAMs). The FFF measurements showed, that despite similar MWs are claimed, substantial differences in MWD are observed. This technology offered the quantification the MWD of HPAAMs up to a MW of 5 GDa. Furthermore, gyration radii of the HPAAM molecules were determined. Selecting polymers on viscosifying power only is not addressing issues related to different MW and MWDs such as selective polymer retention and degradation of the high molar mass part of the distribution. The results were used to improve the polymer selection for chemical EOR projects. Overall, this work presents a new technique for analysis of ultra-high molecular weight EOR polymers, which enables the possibility to determine the full range of polymer MWD. This available information enhances the EOR polymer selection process addressing selective polymer retention and mechanical degradation in addition to the viscosifying power of polymers.
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Jian, Guoqing, Ashok Santra, Hasmukh A. Patel et Ahmet Atilgan. « A Novel Star Polymer based Fluid Loss Control Additive for Non-Aqueous Drilling Fluids ». Dans SPE International Conference on Oilfield Chemistry. SPE, 2023. http://dx.doi.org/10.2118/213791-ms.

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Abstract Non-aqueous fluids (NAF) are considered as efficient and reliable drilling fluid systems for challenging wellbore conditions, such as high-temperature drilling operations. NAFs require fluid loss control additives to reduce filtration loss into the formation with minimum filter cake thickness. Polymer developed in this work demonstrated exceptional properties such as high dispersibility, good thermal stability and low plastic viscosity, when compared with traditional natural and synthetic-based fluid loss control additives (e.g., gilsonite). We have utilized a synthetic molecular optimization process to precisely adjust the hydrophilic-lyophilic balance (HLB) by altering the ratio of hydrophilic to hydrophobic monomers. This has allowed us to achieve an HLB that facilitates easy dispersion within NAF formulations. The star polymer was produced using a controlled/radical polymerization technique called Reversible Addition Fragmentation Chain Transfer polymerization (RAFT). The properties of the NAFs, such as rheology, fluid loss, mud cake thickness, and emulsion stability, were evaluated and compared with commercially available fluid loss control additives under simulated downhole pressure and temperature conditions. The chemical structure and thermal stability of the star polymer were analyzed using spectroscopy and thermogravimetric analysis. The spectroscopic studies confirmed the formation of desired polymeric structures and the molecular weight desired. Star-polymer synthesized herein has excellent thermal stability up to 450 °F with great fluid loss control and ultrathin filter cake for NAF systems for mud weight ranging from 10 to 17 lbm/gal. The star polymer also improves emulsion stability. Plastic viscosity (PV) is usually increased with the addition of commercially available fluid loss control additives; however, star-polymer had a negligible effect on PV. Results for both diesel and mineral oil-based mud systems will be presented. High-temperature high-pressure viscometer (Fann 77) was used to study rheological properties at up to 350 °F and 10,000 psi. Our recent work has resulted in the creation of a cutting-edge star polymer (NSP) for use in the industry's next-gen high-performance fluid loss additives. The polymer network can be efficiently synthesized and scaled up for commercial production, providing engineers with an improved solution for drilling high-temperature wells (up to 350°F) with reduced plastic viscosity and increased emulsion stability, while also providing excellent fluid loss control.
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Rapports d'organisations sur le sujet "Polymer aqueous solution"

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Pierce, John G. An Empirical Model-based MOE for Friction Reduction by Slot-Ejected Polymer Solutions in an Aqueous Environment. Fort Belvoir, VA : Defense Technical Information Center, décembre 2007. http://dx.doi.org/10.21236/ada475951.

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