Gotowe bibliografie tematyczne / Polymer polyol

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Gotowa bibliografia na temat „Polymer polyol”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Polymer polyol"

Ferro, Fabiane Salles, Diego Henrique de Almeida, Amós Magalhães de Souza, Felipe Hideyoshi Icimoto, Andre Luis Christofóro, and Francisco Antonio Rocco Lahr. "Influence of Proportion Polyol/Pre-Polymer Castor-Oil Resin Components in Static Bending Properties of Particleboards Produced with Pinus sp." Advanced Materials Research 884-885 (January 2014): 667–70. http://dx.doi.org/10.4028/www.scientific.net/amr.884-885.667.

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The aim of this research is to evaluate the influence of castor-oil based polyurethane resin formulation (particularly proportion pre-polymer/polyol) in static bending properties of particleboards produced with Pinus sp. wood specie. Results related to modulus of rupture (MOR) and modulus of elasticity were determined. Four proportions polyol/pre-polymer were evaluated: 0.75:1; 1:1; 1:1.25; 1:1.5. Results showed improvement in MOR and MOE with increase of pre-polymer component. Proportion 1:1.25 (poliol: pre-polymer) was considered the most interesting once employs the least amount of the petr

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Han, Yan Ming, Te Fu Qin, and Fu Xiang Chu. "Preparation and Properties of Polyurethane Heat Insulating Building Materials Based on Lignin." Applied Mechanics and Materials 193-194 (August 2012): 505–8. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.505.

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The synthesis of polymer materials from renewable biomass resources has attracted lots of attention. In this study, lignin based polyurethane heat insulating building materials were prepared from isocyanate and lignin polyol. Lignin was modified by polyethylene glycol and glycerol with 0.6% acid at 120°C to obtain lignin polyol containing reactive hydroxyl groups, and then polyurethane foams were prepared by the reaction between the above lignin polyol and isocyanate. Hydroxyl value of lignin polyol, gel time, apparent activation energy for polymerization, impact strength and thermal conductiv

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Andrade Breves, Rodolfo, Daniel Ajiola, Roseany de Vasconcelos Vieira Lopes, et al. "Bio-Based Polyurethane Composites from Macauba Kernel Oil: Part 1, Matrix Synthesis from Glycerol-Based Polyol." Journal of Composites Science 8, no. 9 (2024): 363. http://dx.doi.org/10.3390/jcs8090363.

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Polyurethanes are the result of a reaction between an isocyanate and a polyol. The large variety of possible reagents creates many possible polyurethanes to be made, such as soft foams, rigid foams, coatings, and adhesives. This polymer is one of the most produced and consumed polymers in the world with an ever-increasing demand. Despite its usual petrochemical nature, research on bio-based polyurethanes flourishes due to the ease in creating bio-based polyols. This work covers the synthesis of a novel macauba kernel oil polyol by the epoxidation of the oil, followed by a ring-opening reaction

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de Luca Bossa, Ferdinando, Letizia Verdolotti, Vincenzo Russo, et al. "Upgrading Sustainable Polyurethane Foam Based on Greener Polyols: Succinic-Based Polyol and Mannich-Based Polyol." Materials 13, no. 14 (2020): 3170. http://dx.doi.org/10.3390/ma13143170.

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It is well known that the traditional synthetic polymers, such as Polyurethane foams, require raw materials that are not fully sustainable and are based on oil-feedstocks. For this reason, renewable resources such as biomass, polysaccharides and proteins are still recognized as one of the most promising approaches for substituting oil-based raw materials (mainly polyols). However, polyurethanes from renewable sources exhibit poor physical and functional performances. For this reason, the best technological solution is the production of polyurethane materials obtained through a partial replacem

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Lee, Ju-Hong, Won-Bin Lim, Jin-Gyu Min, et al. "Synthesis of Room Temperature Curable Polymer Binder Mixed with Polymethyl Methacrylate and Urethane Acrylate for High-Strength and Improved Transparency." Polymers 16, no. 10 (2024): 1418. http://dx.doi.org/10.3390/polym16101418.

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Urethane acrylate (UA) was synthesized from various di-polyols, such as poly(tetrahydrofuran) (PTMG, Mn = 1000), poly(ethylene glycol) (PEG, Mn = 1000), and poly(propylene glycol) (PPG, Mn = 1000), for use as a polymer binder for paint. Polymethyl methacrylate (PMMA) and UA were blended to form an acrylic resin with high transmittance and stress-strain curve. When PMMA was blended with UA, a network structure was formed due to physical entanglement between the two polymers, increasing the mechanical properties. UA was synthesized by forming a prepolymer using di-polyol and hexamethylene diisoc

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Cabrera Anaya, Juan Manuel, Kelly Johanna Navas Gómez, Jorge Enrique Pulido Flórez, and Manuel Fernando Valero Valdivieso. "Synthesis and characterisation of simultaneous interpenetrating polymer networks (SIN) formed by polystyrene and polyurethane obtained from castor oil and cassava starch polyol-suspensions." Ingeniería e Investigación 27, no. 1 (2007): 51–57. http://dx.doi.org/10.15446/ing.investig.v27n1.14780.

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Castor oil was modified by transesteritication with pentaerythritol and cassava starch was subsequently incorporated into this oil (oil modified by incorporating starch is called a polyol-suspension). Polyurethane/polystyrene SINs (simultaneously produced IPNs) were synthesized from them and styrene. Reactants used in the synthesis were MDI (methylene diphenyl diisocyanate) as diisocyanate, DVB (divinylbenzene) as crosslinking agent for polystyrene, dibutylamine as redox primer and benzoyl peroxide as styrene polymerisation primer. The variables considered in SIN synthesis were percentage weig

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Razali, N. I. M., F. Ali, A. S. Azmi, T. N. M. T. Ismail, M. E. S. Mirghani, and M. F. Omar. "Microwave-Assisted Synthesis of Polylactic Acid-Diol for Polyurethane as Biodegradable Packaging Material." IOP Conference Series: Materials Science and Engineering 1192, no. 1 (2021): 012015. http://dx.doi.org/10.1088/1757-899x/1192/1/012015.

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Abstract Since its discovery, plastic has been a part of human life and is widely employed in our daily lives. Excessive use of plastic has raised pollution rates around the world, with plastic ending up in landfills or the sea, posing a threat to both terrestrial and aquatic life. Considering this problem, the widespread use of polyurethanes (PUs) in many industries has resulted in unavoidable PUs pollution in everyday life. A reaction involving prepolymer, isocyanate, and polyol can be used to make PUs. Petroleum-based polyol and vegetable oil-based polyol are the two types of polyols availa

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Hu, Dengping, Chunyan Wang, Zhe Luo, and Xuanxuan Chu. "Study on Parameter Optimization and Mechanism of Rigid-Flexible Coupling Underground Engineering Structure of Steel Panel and Polymer." Advances in Civil Engineering 2021 (December 11, 2021): 1–13. http://dx.doi.org/10.1155/2021/5145712.

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Polymer grouting is carried out between the steel panel and surrounding soil in underground engineering, and the polymer material consists of isocyanates and polyols. The isocyanate/polyol composite slurry expands rapidly due to chemical reaction and solidifies immediately. Then, a dense impermeable polymer layer is formed after rapid expansion of isocyanate and polyol, which is widely used for ground reinforcement and foundation remediation. Thus, a steel panel-polymer composite structure is developed. Mechanical properties of the steel panel-polymer structure are studied. The results show th

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Mohammed, Dhey Jawad, Nizar Jawad Hadi, and Zoalfokkar Kareem Alobad. "Investigation of the Epoxy Concentrations Effect on the Mechanical Properties of Polyurethane Foams." Iraqi Journal of Industrial Research 9, no. 2 (2022): 50–58. http://dx.doi.org/10.53523/ijoirvol9i2id225.

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Thermosetting foam had a number of advantage in comparison with unfoamed polymer such as lightweights, higher specifics strength, and stiffness. In this work, preparations and characterizations of polymers foams from polyurethanes have carrying out by means of one shot methods for productions of microcellulars polymers that are using in the lower limp application. Many type of polyols (Local commercial market, Quickmast 110, and Quickmast 120) at equivalents ratios of (isocyanate:polyol) [1:1] mixing with 5 drops of distill water as chemicals blowing agent. Different amounts of epoxy resin [2.

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Rus, Anika Zafiah Mohd, Nurul Syamimi M. Salim, and M. F. Idaris. "Processing of Sustainable Polymer with Thermoplastics by Injection Moulding." Applied Mechanics and Materials 799-800 (October 2015): 57–61. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.57.

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Among different natural oils, recycling of waste vegetable oils from palm oil is widely explored for polyol synthesis to prevent pollution of waterways and clogging private and municipal drain systems, restaurants and other food preparation. The polyol is solidifying using cross linker and known as Sustainable Polymer (SP). SP is compounded with High-Density Polyethylene (HDPE) and Low-Density Polyethylene (LDPE) by melt-mixing using an injection molding machine. The effect of polymer compounding ratio on the mechanical properties was studied by tensile test. The result indicated that increasi

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Rozprawy doktorskie na temat "Polymer polyol"

Kanaan, Georges. "Conception, modélisation et optimisation d'un procédé continu d'élaboration d'une dispersion stabilisée de particules de polystyrène dans un polyéther polyol." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL073N/document.

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Ces travaux de recherche ont porté sur la mise au point et l’optimisation d’un nouveau procédé continu d’élaboration de dispersions stabilisées de particules de polystyrène dans un polyéther polyol. L’objectif final était de parvenir à minimiser le diamètre moyen des particules et à maximiser le taux de solide dans le mélange tout en maintenant sa stabilité.L’étude bibliographique a montré l’importance du choix du stabilisant et des paramètres opératoires du procédé dans la formation de la dispersion. Une étude préliminaire menée en réacteur fermé avec différents stabilisants a conduit à sélec

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Kull, Kenneth. "Synthesis and Characterization of Novel Polyurethanes and Polyimides." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6530.

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Four novel high performance soft thermoplastic polyurethane elastomers utilizing methylene bis(4-cyclohexylisocyanate) as a hard segment, 1,4 butanediol as a chain extender and modified low crystallinity carbonate copolymer as a soft segment were synthesized. The samples were characterized by infrared spectroscopy (FTIR), tensile, elongation, hardness, abrasion resistance and atomic force microscopy (AFM). SAXS data shows evidence of an interdomain "center-to-center" distance of 45Å. DSC traces show evidence of one glass transition temperature and a weak melting region. DMA analysis reveals a

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Zhou, Ping. "Preparation, characterization and in vivo evaluation of polyether polyol-platinate conjugate /." View abstract or full-text, 2010. http://library.ust.hk/cgi/db/thesis.pl?CBME%202010%20ZHOU.

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Saleh, Nabil Abdulkader. "Structure-property relationships in polymer-polyols-based polyurethane elastomers." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/35588.

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Polyurethanes are a class of materials which can be regarded as filling the gap between rubbery elastomers and rigid plastics and metals. They can exhibit both high elongation and resilience, while retaining high modulus which make them unique for a wide variety of applications in which both stiffness and extensibility is needed. It is now widely accepted that the diverse properties of these copolymers are attributed to the existence of a two phase microstructure. One phase is regarded as a glassy or hard segment, whereas the other phase is considered to be rubbery and to give soft segments. T

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Ling, Dee Ann. "Primary structural evolution in acid-catalyzed silica polysol-gel processes." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/11873.

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Río, Nieto Enrique del. "New polyurethanes from vegetable oil-based polyols." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/31904.

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Los poliuretanos son uno de los materiales poliméricos más usados debido a sus buenas propiedades. Tradicionalmente, los poliuretanos se han sintetizado a partir de derivados del petróleo, sin embargo, teniendo en cuenta motivos de sostenibilidad, se hace necesario desarrollar tecnologías más ecológicas y económicamente viables. En esta tesis se han obtenido poliuretanos con buenas propiedades mecánicas y memoria de forma a partir de polioles basados en aceites vegetales, utilizando diferentes estrategias sintéticas: A partir de oleato de metilo epoxidado, mediante polimerización por apertura

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Czech, Przemyslaw. "Molecular dynamics of polyerethanes bases on hyperbranched polymers." Lyon 1, 2006. http://www.theses.fr/2006LYO10127.

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Dubuisson, Michel. "Le Latin de Polybe : les implications historiques d'un cas de bilinguisme /." Paris : Klincksieck, 1985. http://catalogue.bnf.fr/ark:/12148/cb348369585.

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Helin, Alexandre. "Commentaire historique composé des livres XXII à XXIX des "Histoires" de Polybe." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCD036/document.

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La victoire des Romains sur les Séleucides à Apamée en 188 av. J.-C. leur permet d'acquérir le statut de puissance dominante du bassin méditerranéen, au détriment des monarchies hellénistiques et des confédérations de cités grecques. Dans les livres XXII à XXIX des Histoires, dont les fragments qui nous sont parvenus proviennent des Excerpta Constantiniana, Polybe nous décrit les événements qui ont suivi, jusqu'à la victoire de Rome sur la Macédoine de Persée en 168. Il cherche à justifier l'attitude des Romains, rejetant la responsabilité du déclenchement de la troisième guerre de Macédoine s

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Husby, Chad Eric. "Influence of Temperature and Time on Nutrient Release Patterns of Osmocote Plus™, Nutricote™, and Polyon™ Controlled-Release Fertilizers." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33658.

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Polymer-coated controlled-release fertilizers (PCFs) are the most widely used class of fertilizers in the production of container-grown nursery plants. Nutrient release from PCFs is primarily influenced by temperature. The objective of this study was to determine the influences of temperature and time on the nutrient release patterns of three PCFs (each with a rated longevity of 8-9 months), each using a different coating technology: Osmocote Plus™ 15N-3.93P-9.96K, Polyon™ 18N-2.62P-9.96K, and Nutricote™ 18N-2.62P-6.64K. The first three experiments investigated the effects of time on long-

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Książki na temat "Polymer polyol"

Thompson, Suzann. Pa te polyme re, pa te Fimo. E ditions Soline, 1999.

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1931-, Sakamoto N., ed. Polyol pathway and its role in diabetic complications: Proceedings of the International Symposium on Polyol Pathway and Its Role in Diabetic Complications, Kashikojima, Japan, 28-30 October 1986. Excerpta Medica, 1988.

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Greve, Bettina. Sternenhimmel: Die Chronik einer deutschen Schallplattenmarke. Hannibal, 2001.

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Moman, R. A. A fundamental study of the difference in PUR polymer and foam formation between ethyleneoxide and propyleneoxide terminated rigid foam polyols. UMIST, 1994.

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Günther, Manfred. Ein Name wie Musik: Die Polydor-Singles Deutschland, 1953-1970. Bear Family Records, 2001.

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International Symposium on Bacterial Polyhydroxyalkanoates (5th 1996 Davos, Switzerland). 1996 International Symposium on Bacterial Polyhydroxyalkanoates. NRC Research Press, 1997.

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Belkum, Alex Van (19..-....). Auteur and Hays, John P. (19..-....). Auteur, eds. Principles and technical aspects of PCR amplification. Springer, 2010.

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Panigrahi, Muktikanta, and Arpan Kumar Nayak. Polyaniline based Composite for Gas Sensors. IOR PRESS, 2021. http://dx.doi.org/10.34256/ioriip212.

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In this research work, we have demonstrated the synthesis, spectroscopic characteristics, thermal behaviour and DC conductivity of a few nanostructured composites, substituted conducting polymers (ICPs) and composites of ICPs. The physical properties of aforementioned composites are significantly changed by the doping with HCl, H2SO4, HNO3, H3PO4, or acrylic acid. The charge transport properties of these polymeric materials have been studied in detail because of their potential application in gas sensors. In the current work, varieties of conducting polymer based materials such as PANI-ES/Cloi

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Kyriacos, Deny. Biobased Polyols for Industrial Polymers. Wiley & Sons, Limited, John, 2020.

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Kyriacos, Deny. Biobased Polyols for Industrial Polymers. Wiley & Sons, Incorporated, John, 2020.

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Części książek na temat "Polymer polyol"

Gooch, Jan W. "Polyol." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9164.

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Shi, Yun Ze, Hui Qing Fan, Mei Tian Bi, Jie Zhang, and Xian Hua Zeng. "Synthesis and Growth Mechanisms of Ag Metallo-Organic Nanoparticles in Different Morphologies by Using Polymer-Mediated Polyol Process." In Advances in Composite Materials and Structures. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-427-8.817.

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Gooch, Jan W. "Polyox." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9170.

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Rabhi, F., G. Cheng, and T. Barriere. "Modeling of Viscoelasticity of Thermoplastic Polymers Employed in the Hot Embossing Process." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-58006-2_19.

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AbstractThe manufacturing of micro-scale components requires mastery of shaping processes ranging from micromechanics to electronic microfabrication. The hot embossing (HE) process is widely developed in various fields, since it allows to emboss complex structures at the micro/nanoscale such as optical sensors, diffractive lenses, microfluidic channels, and so on. The development of micro-structured parts via this process requires an in-depth analysis of the surface quality obtained and the mold filling rate. It is essential to analyze the influence of polymer properties to optimize the final

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Gooch, Jan W. "Triangle or Polygon of Forces." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_12070.

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Sharma, Sreekala S., V. N. Anjana, and Anu K. John. "PTT-Based Polymer Blends and IPNs: Preparation Methods." In Poly Trimethylene Terephthalate. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7303-1_2.

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Thomas, Rinku Mariam, Sreedha Sambhudevan, S. Hema, and Arunima Reghunadhan. "PTT/Rubber, Thermoplastic and Thermosetting Polymer Blends and IPNs." In Poly Trimethylene Terephthalate. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7303-1_4.

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Remya, V. R., and H. Akhina. "Characterization Techniques of PTT-Based Polymer Blends and IPNs." In Poly Trimethylene Terephthalate. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7303-1_3.

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Rath, Abjesh Prasad, and M. K. Kanny. "Textile Applications of PTT-Based Polymer Blends, Composites, and Nanocomposites." In Poly Trimethylene Terephthalate. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7303-1_12.

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Hema, S., Sreedha Sambhudevan, C. Sreelekshmi, Malavika Sajith, and K. Rashid Sulthan. "Industrial Applications of PTT-Based Polymer Blends, Composites, and Nanocomposites." In Poly Trimethylene Terephthalate. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7303-1_11.

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Streszczenia konferencji na temat "Polymer polyol"

Rahman, Mohammad Mizanur. "Biodegradable Antifouling Coating." In MPWT 2019. NACE International, 2019. https://doi.org/10.5006/mpwt19-15293.

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Abstract Due to the regulations of toxic biocidal products in marine environments, the development of nontoxic antifouling (AF) coatings has become required. The development of nontoxic antifouling formulations implies the use of ingredients (such as: polymers, additives and pigments) that are devoid of toxicity towards marine environments. In this regard, erodible coatings, based on biodegradable polymer, are used to respond to this problem. Recently, polyurethane (PU) has been adopted into antifouling coating due to its ability to migrate the certain functional groups which resist the attach

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Akram, Deewan, Eram Sharmin, and Sharif Ahmad. "Biohybrid Silver Nanocomposites as Antimicrobial Corrosion Protective Coating Materials." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01739.

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Abstract Organic-inorganic hybrid polyurethane silver nanocomposite (Ag/LPOSiPU) were prepared in three steps- (i) synthesis of organic-inorganic hybrids (LPOSi) from linseed oil polyol (LPO) as organic and tetraethoxyorthosilane (TEOS) as inorganic precursors, respectively through sol-gel process, (ii) preparation of silver nano-particles in organic-inorganic hybrids (LPOSi) via reduction of silver salt (AgNO3) by employing N,N_-dimethylformamide (DMF) as reducing agent at room temperature to obtain Ag/LPOSi, and (iii) Ag/LPOSi further treated with toluene 2,4 di-isocyanate to form their poly

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Amjad, Zahid. "Gypsum Scale Inhibitors Performance in the Presence of Impurities." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16707.

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Abstract In the present work a variety of polymers with different functional groups and molecular weight (MW) were tested as gypsum scale inhibitors. The polymers tested include: poly(acrylic acid) PAA; poly(maleic acid), PMA; poly(aspartic acid), PASP; poly(epoxysuccinic acid), PESA; carboxymethyl inulin (CMI-25); copolymers of maleic acid:sulfonated styrene, PMAS); maleic acid:vinyl pyrrolidone, PMVP. The results indicated that performance of polymers strongly depends on the polymer architecture. Based on the data collected, the polymers may be ranked as follows: PAA &gt; PMA &gt; PA

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Hellems, Steve, John Willhite, and Ramesh Subramanian. "Bio Based Waterborne Floor Coatings with Enhanced Flow, Appearance, and Early Hardness Development." In SSPC 2015 Greencoat. SSPC, 2015. https://doi.org/10.5006/s2015-00026.

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Abstract The use of sustainable materials in the flooring market has gained widespread interest in recent years. Bio based raw materials contribute significantly to these efforts and are used to prepare environmentally friendly coatings. Castor oil based emulsions are used as polyols in waterborne polyurethane coatings. These systems have outstanding chemical resistance and good durability. But they have inherent issues like very short pot life, poor appearance / flow properties, and delayed early hardness development. In this paper the development of a new castor oil based polyol emulsion tha

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Demadis, Kostas D., Aggeliki Stathoulopoulou, and Antonia Ketsetzi. "Inhibition and Control of Colloidal Silica: Can Chemical Additives Untie the "Gordian Knot" of Scale Formation?" In CORROSION 2007. NACE International, 2007. https://doi.org/10.5006/c2007-07058.

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Abstract Colloidal silica is one of the most unwanted deposits in the water treatment industry. Its control is a complicated issue and the decision on which control method to apply is frequently based on a number of factors. Our goal is the discovery, design and application of organic additives (preferably “green” and environmentally friendly) that have some effect on silicate polymerization. This paper reports the inhibition efficiency of a variety of polymeric additives and some combinations in retarding silicate polymerization is supersaturated aqueous solutions. There are three classes of

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Amjad, Zahid, and Peter G. Koutsoukos. "Influence of Inhibitor Architecture on Magnesium Ammonium Phosphate (Struvite) Precipitation for Waste Water Application." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-10926.

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Abstract In this work, a variety of polymers were evaluated as precipitation inhibitors for magnesium ammonium phosphate (struvite) in aqueous solution. The polymers tested include 1) homopolymers of acrylic acid and methacrylic acid of varying molecular weight (MW), maleic acid, 2-ethyloxazoline, 2) acrylic acid based co- and terpolymers containing monomers with different functional groups and 3) natural, bio- and hybrid based polymers. The results reveal that polymer performance as a struvite inhibitor is strongly affected by polymer dosage, MW, and ionic charge of the functional group. It h

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Montag, Petr, and Alena Kalendova. "INVESTIGATION OF RECYCLED POLYOL PRODUCED FROM SEMI-RIGID POLYURETHANE FOAM OUTSOURCED FROM THE AUTOMOTIVE INDUSTRY." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023/4.1/s18.22.

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Polyurethane, as a versatile polymer prepared by the polyaddition of isocyanates and hydroxyl group containing compounds, is widely used in the automotive industry and with an upcoming change of European legislation becomes recycling increasingly important as an alternative to landfilling or incineration. Glycolysis is one of the chemical degradation processes used to transform polyurethane waste using simple glycols as the degradation agents into a raw material. Single phase glycolysis was used to produce recycled polyol from polyurethane semi-rigid foam dedicated for headliner production. Th

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Rahman, M. M., N. Jahan, S. Zainuddin, M. V. Hosur, S. Jeelani, and Ashok Kumar. "Optimization of Low-Velocity Impact Properties of E-Glass/Epoxy Composites Using Plasticizing Modifiers." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85411.

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The prime aim of this work is to enhance the energy absorbing capabilities of e-glass/epoxy composite under low velocity impact using plasticizing modifiers. Epoxy terminated polyol at 5–15 phr loading levels as plasticizing modifier was mixed into two-phase SC-15 epoxy resin system by a high speed mechanical stirrer. Modified epoxy resin system was then used to fabricate E-glass/epoxy composites by hot press processing. Low velocity impact test at two different energy levels was carried out to investigate the effectiveness of incorporating plasticizing modifier on impact properties of these c

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MA, XUEJIAO, SHUO AN, FANGDONG DONG, TIANLONG ZHANG, WENMIN YAN, and MANMAN XIONG. "COMPARATIVE EXPERIMENTAL STUDY ON THE CHARACTERISTICS OF PISTOL BULLET PENETRATING GELATIN AND POLYMER SIMULATED MUSCLE TARGET." In 32ND INTERNATIONAL SYMPOSIUM ON BALLISTICS. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/ballistics22/36194.

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Polyurethane elastomer material-simulated muscle target-was synthesized by prepolymer with isocyanate hard segment and polyether polyol with long chain soft segment. The polymer simulated muscle target could be stored and used at normal room temperature. Penetration experiments were carried out on gelatin and muscle simulated material target, used 9mm pistol bullet as killing element. Through the comparative analysis of experimental data: when the pistol bullet penetrates the gelatin and polymer simulated muscle target with soft protection, the change process of the depression was basically th

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Ahuja, Suresh K. "Visco-Elastic Modulus and Intercalation of Polymer Chains in Epoxy Nano-Composites." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42503.

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Polymer nano-composites (PNC) are polymers which are reinforced with less than 5% by volume of nano-sized particles with high aspect ratios (L/h > 300). Compared to conventional composites, where the reinforcement is on the order of microns, the nano-composites are reinforced on the order of a few nanometers with advantages in processing and toughness. Nano-composites of epoxy clay have been studied where epoxy is mixed at high shear rates with clay. In our method of making nano-composites, an epoxy, Diglycidyl ether of bisphenol (DGEBA) A was mixed under high shear with organically modifie

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Raporty organizacyjne na temat "Polymer polyol"

Karst, Adèle, Michel Bouquey, Jérémie Soulestin, Cédric Samuel, and Thibault Parpaite. Formulation of highly electro-conductive thermoplastic composites using PEDOT-based fillers with controlled shape factor. Universidad de los Andes, 2024. https://doi.org/10.51573/andes.pps39.gs.pc.2.

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The objective of this study is to develop a new conductive thermoplastic material with superior electrical properties. Currently, conductive polymers are typically filled with carbon or metallic particles [1]. However, these filled thermoplastics exhibit drawbacks such as high rigidity, toxicity, and high viscosity [2]. An alternative approach investigated in this work is to substitute these fillers with intrinsically conductive polymers like Poly(3,4-ethylenedioxythiophene) (PEDOT). PEDOT can achieve exceptional electrical conductivities (over 1000 S.cm-1) when combined with polymeric dopants

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Hilhorst, Marieke, Sara Caliari, Wouter Post, Lambertus J. Kuijpers, and Fresia Alvarado Chacon. Thin films from modified Poly(glycolic acid) with excellent water vapor barrier. Universidad de los Andes, 2024. https://doi.org/10.51573/andes.pps39.gs.farp.1.

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Commercial biodegradable polymers that combine high oxygen and water vapor barrier properties are scarce. In the packaging industry multilayer materials are usually used to achieve the barrier requirements, however they are usually not recyclable and will not biodegrade when discarded. The outstanding barrier properties of poly(glycolic acid) (PGA) make it an excellent candidate for a biodegradable oxygen and water vapor barrier packaging material. At the same time, its processability into films using standard converting equipment is a major challenge. Low melt strength, high processing temper

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Hills, R. G., P. D. Meyer, and M. L. Rockhold. PolyRES: A polygon-based Richards equation solver. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/179180.

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Mays, Jimmy W. Poly(cyclohexadiene)-Based Polymer Electrolyte Membranes for Fuel Cell Applications. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1008339.

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Vargas Rojas, Manuela, Felipe Salcedo Galán, and Jorge Medina Perilla. Processability study of thermoplastic starch/poly(Butylene Succinate Adipate) blends in a reactive extrusion. Universidad de los Andes, 2024. https://doi.org/10.51573/andes.pps39.ss.bbb.3.

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Growing concerns about ocean contamination from fossil fuel based polymers have created a demand for biodegradable alternatives, particularly for packaging applications. Thermoplastic starch (TPS) is a promising, eco-friendly biopolymer but has poor mechanical properties and high hydrophilicity. To address these issues, this article explores modifying starches through reactive extrusion and blending them with other biodegradable polymers. The study evaluates blends of native or acetylated starch with poly(butylene succinate) adipate (PBSA), using glycerol as a plasticizer and tartaric acid as

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Dave, Foram, Mahmood Ali, Mozaffar Mokhtari, Richard Sherlock, Alistair Mcllhagger, and David Tormey. Effect of pigments on laser beam transmission in diode laser transmission welding of poly(propylene). Universidad de los Andes, 2024. https://doi.org/10.51573/andes.pps39.gs.pc.4.

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Welding technologies are state of the art for joining polymer composites, with one of the two joining parts considered laser transmissive (LT) and the other laser absorptive (LA). Pigments are often added to LT to enhance the crystallinity of the polymer matrix. However, pigments lead to internal scattering of the laser beam and the rate of transmission or the laser energy density decreases. Depending upon the type and amount of pigments added in the formulation of LT, the percentage of the laser beam transmitted, absorbed, or scattered differs. Laser welding performance depends on the laser e

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P. Hoven, Voravee, Kohn, Joachim, and Adisorn Poopattanapong. Immobilization of RGD Peptides on surface of Tyrosine-Derived Polycarbonate to enhance cell adhesion and proliferation. Chulalongkorn University, 2006. https://doi.org/10.58837/chula.res.2006.35.

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This research has focused on chemical immobilization of RGD-containing peptides (RGD, RGDS, GRGDS) on the surface of tyrosine-derived polycarbonates having carboxyl pendant groups, poly(DTE-co-20%DT carbonate) through a two-step reaction. The first step involved an activation of carboxyl groups by N-hydroxysuccinimide (NHS) in the presence of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI). The second step was a covalent attachment of RGD-containing peptides. The success of peptides. The success of peptide immobilization was determined by the ninhydrin method and x-ray photo

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Ashley, K., S. Pons, and M. Fleischmann. Mathematical Modelling of Transport through Conducting Polymer Films. 1. The Poly(paraphenylene) System. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada200842.

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Uppuluri, Srinivas, Petar R. Dvornic, June W. Klimash, Peter I. Carver, and Nora C. Tan. The Properties of Dendritic Polymers I: Generation 5 Poly(amidoamine) Dendrimers. Defense Technical Information Center, 1998. http://dx.doi.org/10.21236/ada346880.

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Sirivat, Anuvat. Electrically controlled release of drugs from alginate hydrogels for transdermal drug delivery application. Chulalongkorn University, 2014. https://doi.org/10.58837/chula.res.2014.80.

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A drug-loaded conductive polymer/hydrogel blend, benzoic acid-loaded poly(3,4-ethylenedioxythiophene/alginate (BA-loaded PEDOT/Alg) hydrogel, was used as a carrier/matrix for an electrical stimuli transdermal drug delivery system (TDDS). The effects of crosslinking ratio, PEDOT particle size, and electric field strength on the release mechanism and the diffusion coefficient (D) of BA were examined by using a modified Franz-diffusion cell. The diffusion scaling exponent value of BA is close to 0.5 which refers to the diffusion controlled mechanism, or the Fickian diffusion as the BA release mec

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