Se connecter

Bibliographies thématiques / Polyester polyol / Articles de revues

Pour voir les autres types de publications sur ce sujet consultez le lien suivant : Polyester polyol.

Articles de revues sur le sujet « Polyester polyol »

Auteur : Grafiati

Publié le 7 juin 2025

Mis à jour le 2 août 2025

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres

Choisissez une source :

Consultez les 50 meilleurs articles de revues pour votre recherche sur le sujet « Polyester polyol ».

À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.

Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.

Parcourez les articles de revues sur diverses disciplines et organisez correctement votre bibliographie.

1

Abdollahi, Mohammad, and Behzad Khalili. "Advancements in polyurethane coating: Synthesis and characterization of a novel hyper branched polyester polyol." Current Chemistry Letters 13, no. 1 (2024): 117–26. http://dx.doi.org/10.5267/j.ccl.2023.8.004.

Texte intégral

Résumé :

Hyperbranched polyester polyols have emerged as a promising candidate for polyurethane coatings due to their unique structure and properties. In this context, this paper aims to synthesize a new hyperbranched polyester polyol and evaluate its potential as a polyol for polyurethane coating applications. In this study, the synthesis of hyperbranched polyester polyol involves the reaction between a multifunctional alcohol and a multifunctional carboxylic acid or anhydride. It is further modified by incorporating 2-hydroxyethyl methacrylate and styrene. The properties of the polyester polyol were

Styles APA, Harvard, Vancouver, ISO, etc.

2

Čuk, Nataša, Miha Steinbücher, Nejc Vidmar, Martin Ocepek, and Peter Venturini. "Fully Bio-Based and Solvent-Free Polyester Polyol for Two-Component Polyurethane Coatings." Coatings 13, no. 10 (2023): 1779. http://dx.doi.org/10.3390/coatings13101779.

Texte intégral

Résumé :

In recent years, many efforts are being devoted to the development of new materials that originate from renewable resources. Polyesters are one of the most important classes of such materials and several bio-based monomers are available for their synthesis. In this work, the development of fully bio-based and solvent-free polyester polyol used for two-component polyurethane coatings on industrial scale is presented. Fossil-based raw materials were substituted with bio-based alternatives that are commercially available on a large scale. Properties of polyols and coatings were determined and mea

Styles APA, Harvard, Vancouver, ISO, etc.

3

Lang, Kening, Regina J. Sánchez-Leija, Richard A. Gross, and Robert J. Linhardt. "Review on the Impact of Polyols on the Properties of Bio-Based Polyesters." Polymers 12, no. 12 (2020): 2969. http://dx.doi.org/10.3390/polym12122969.

Texte intégral

Résumé :

Bio-based polyol polyesters are biodegradable elastomers having potential utility in soft tissue engineering. This class of polymers can serve a wide range of biomedical applications. Materials based on these polymers are inherently susceptible to degradation during the period of implantation. Factors that influence the physicochemical properties of polyol polyesters might be useful in achieving a balance between durability and biodegradability. The characterization of these polyol polyesters, together with recent comparative studies involving creative synthesis, mechanical testing, and degrad

Styles APA, Harvard, Vancouver, ISO, etc.

4

Zhang, Zhaoyang, Nannan Ni, and Yahong Xu. "Effects of Different Polyols with Functions on the Properties of Polyester Polyol-Based Polyurethane Coatings." Coatings 15, no. 1 (2025): 61. https://doi.org/10.3390/coatings15010061.

Texte intégral

Résumé :

Polyester-based polyurethane coatings were widely used in automotive, industrial, construction, and plastics industries due to their excellent mechanical properties, adhesion, and relatively outstanding oil and chemical resistance. In these coatings, the type and ratio of polyester and isocyanate curing agents influenced the cohesion energy, hydrogen bonding, crystallinity, crosslinking density, molecular weight, and morphology of the polyurethane at the microscopic level, thereby affecting the macroscopic mechanical properties, electrical performance, and environmental resistance of the mater

Styles APA, Harvard, Vancouver, ISO, etc.

5

Gomzyak, V. I., N. V. Bychkov, A. S. Aduev, V. A. Ivanova, A. D. Koshelev, and S. N. Chvalun. "Polymerization of D,L-lactide in the presence of Boltorn™ polyester polyol." Fine Chemical Technologies 17, no. 3 (2022): 242–52. http://dx.doi.org/10.32362/2410-6593-2022-17-3-242-252.

Texte intégral

Résumé :

Objects. To synthesize monodisperse biodegradable hyperbranched polymers based on D,L-lactide in the presence of Boltorn™ H30 polyester polyol as a macroinitiator.Methods. 1H and 13C nuclear magnetic resonance (NMR) spectroscopy was used to study the chemical structure of the Boltorn™ H30 polyester polyol and (Boltorn™ H30)-PDLA hyperbranched copolymers. The molecular weight distribution of the polymers was studied by gel permeation chromatography (GPC). In order to study the thermal stability of Boltorn™ H30 polyester polyol, thermogravimetric analysis (TGA) was used. Polymerization of D,L-la

Styles APA, Harvard, Vancouver, ISO, etc.

6

Geng, Xiao Yi, Zhi You Hu, Fei Yang, et al. "Preparation and Characterization of Aqueous Polyurethane Polyol Used in Waterbore Two-Component Polyurethane Coating." Applied Mechanics and Materials 470 (December 2013): 53–57. http://dx.doi.org/10.4028/www.scientific.net/amm.470.53.

Texte intégral

Résumé :

Aqueous polyurethane(PU) polyols were synthesized from polyester polyol, toluene diisocyanate(TDI), dimethylolbutyric acid (DMBA) and diethanolamine(DEA). The structure of PU polyol and resulting polyurethane film were confirmed by the Fourier Transform Infrared Spectroscopy (FT-IR). The effects of NCO/OH and DMBA content on the particle size of PU polyol and resulting polyurethane films, which formed by the mixture of PU polyol and water-dispersible polyisocyanate, was investigated by dynamic light scattering analysis, dynamic mechanical analysis and measurement of the mechanical properties.T

Styles APA, Harvard, Vancouver, ISO, etc.

7

Aryani, Adriana Sari, Yulian Syahputri, and Hermawan Hermawan. "VALUE CHAIN PALM OIL INDUSTRY ANALYSIS ON THE POLYOL POLYESTER PATHWAY." IJTI (International Journal of Transportation and Infrastructure) 2, no. 2 (2019): 105–16. http://dx.doi.org/10.29138/ijti.v2i2.964.

Texte intégral

Résumé :

Palm oil is one of important Indonesia's export commodities. In 2017, the export value of palm oil and its derivatives (excluding oleochemicals and biodiesel) penetrated US $ 22.97 billion. The bright prospect of the palm oil commodity in the world vegetable oil trade encouraged the Indonesian government to develop an integrated palm oil industry. On the other hand, some downstream petrochemical products have begun to experience difficulties in raw materials, including Polyurethane. Polyurethane is a polymeric material from polyols and isocyanates which are widely used as packaging. Polyol its

Styles APA, Harvard, Vancouver, ISO, etc.

8

Zhang, Cheng, Yixuan Zhang, Yao Liu, et al. "Effects of Polyol Types on Underwater Curing Properties of Polyurethane." Polymers 17, no. 1 (2024): 5. https://doi.org/10.3390/polym17010005.

Texte intégral

Résumé :

This study aims to develop castable polyurethane suitable for applications on wet substrates or underwater construction. Polyurethanes were synthesized using various polyols with similar hydroxyl values, including poly(tetrahydrofuran) polyol, polyester polyol, castor oil-modified polyol, soybean oil-modified polyol, and cashew nut shell oil-modified polyol. The corresponding polyurethane curing products were evaluated for their underwater curing characteristics by volume expansion ratios and adhesion strength on dry and wet substrates, combined with analyses of reaction exothermic behavior, w

Styles APA, Harvard, Vancouver, ISO, etc.

9

Iannace, Salvatore, Roberta Alfani, Luigi Nicolais, Grazia Baggi, and Maurizio Zangrossi. "Effects of Composition on Thermal, Mechanical Properties and Biodegradability of Starch Based Polyurethane Foams." Cellular Polymers 18, no. 1 (1999): 21–33. https://doi.org/10.1177/026248939901800102.

Texte intégral

Résumé :

Polyurethane foams (PU) were prepared combining natural polysaccharides with polyester polyols and an aliphatic diisocyanate. Two classes of PU foams were studied: the first one was prepared by using starch as one of the components of the polyol mixture, while the second class was prepared by adding starch as filler to a reactive mixture containing sucrose in the polyol composition. Influence of chemical composition on mechanical, thermal and morphological properties were investigated. Moreover, biodegradation tests were performed on selected foams.

Styles APA, Harvard, Vancouver, ISO, etc.

10

Niesiobędzka, Joanna, Ewa Głowińska, and Janusz Datta. "Eco-Friendly Ether and Ester-Urethane Prepolymer: Structure, Processing and Properties." International Journal of Molecular Sciences 22, no. 22 (2021): 12207. http://dx.doi.org/10.3390/ijms222212207.

Texte intégral

Résumé :

This study concerns bio-based urethane prepolymers. The relationship between the chemical structure and the thermal and processing parameters of bio-based isocyanate-terminated ether and ester-urethane prepolymers was investigated. Bio-based prepolymers were obtained with the use of bio-monomers such as bio-based diisocyanate, bio-based polyether polyol or polyester polyols. In addition to their composition, the bio-based prepolymers were different in the content of iso-cyanate groups content (ca. 6 and 8%). The process of pre-polymerization and the obtained bio-based prepolymers were analyzed

Styles APA, Harvard, Vancouver, ISO, etc.

11

Sundang, Murni, Nur Sjanrah Nurdin, Sariah Saalah, et al. "Synthesis of Jatropha-Oil-Based Polyester Polyol as Sustainable Biobased Material for Waterborne Polyurethane Dispersion." Polymers 14, no. 18 (2022): 3715. http://dx.doi.org/10.3390/polym14183715.

Texte intégral

Résumé :

The utilization of vegetable oil in the production of polymeric material has gained interest due to its proven ability to replace nonrenewable petroleum sources, as it is readily modified via chemical reaction to produce polyol and subsequently for polyurethane production. Jatropha oil (JO), a second-generation feedstock, is one of the suitable candidates for polyester polyol synthesis because it contains a high percentage of unsaturated fatty acids. In this study, jatropha-based polyester polyols (JOLs) with different hydroxyl values were successfully synthesized via a two-step method: epoxid

Styles APA, Harvard, Vancouver, ISO, etc.

12

Kutyreva, M. P., A. E. Burmatova, A. A. Khannanov, and V. G. Evtugin. "High-temperature synthesis of cobalt nanoparticles in hyperbranched polyester polyol medium." Журнал общей химии 93, no. 1 (2023): 146–52. http://dx.doi.org/10.31857/s0044460x23010171.

Texte intégral

Résumé :

The synthesis of CoNPs cobalt nanoparticles by the method of polyol- process was proposed, which consists in a high-temperature synthesis of polymer-stabilized metal nanoparticles in a matrix of a fourth-generation hyperbranched polyester polyol. Branched polyester polyol acts as both a reducing agent and a stabilizer at the same time. It has been found that the reduction of the precursor CoCl2 with a hyperbranched polyester polyol occurs at 210°C. The introduction of NaOH into the reaction mixture makes it possible to lower the synthesis temperature by 50°C and leads to a change in the mechan

Styles APA, Harvard, Vancouver, ISO, etc.

13

Correia, Cristina Borges, and João C. Bordado. "Synthesis and Characterization of New Polyurethane Adhesives." Materials Science Forum 514-516 (May 2006): 843–47. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.843.

Texte intégral

Résumé :

Polyurethane adhesives provide excellent flexibility, impact resistance and durability. Polyurethanes are formed through the reaction of an isocyanate component with polyether or polyester polyols or other active hydrogen compounds. This paper refers to polyurethane adhesives made from polyester polyols with long aliphatic chains (up to 36 carbon atoms) and MDI (diphenylmethane-4,4’-diisocyanate). The polyester polyols have been made from dimer acids obtained from renewable sources and short chain diols. The polyols that were used presented different degrees of unsaturation. The influence of t

Styles APA, Harvard, Vancouver, ISO, etc.

14

Dong, Jingjing, Zexi Zhang, Hongyu Tian, et al. "Soybean-Oil-Modified Petrochemical-Source Polyester Polyurethane Improves the Nutrient Release Performance of Coated Urea." Agronomy 13, no. 12 (2023): 3008. http://dx.doi.org/10.3390/agronomy13123008.

Texte intégral

Résumé :

Due to the difficult degradation and high cost of polyester polyols (PPs), their further development in controlled-release fertilizers (CRFs) has been limited. It was of great significance to partially substitute PPs with soybean oil polyols (SOPs) in the preparation of CRFs, which can adjust the proportion of substitution to balance the nutrient release period and membrane degradability. And it is possible to adjust the nitrogen release curve and prepare coated urea with different release days without changing the coating thickness. In this study, a two-factor five-level interaction experimen

Styles APA, Harvard, Vancouver, ISO, etc.

15

Shin, Se-Ra, and Dai-Soo Lee. "Thermally Healable Polyurethane Elastomers Based on Biomass Polyester Polyol from Isosorbide and Dimer Fatty Acid." Polymers 16, no. 24 (2024): 3571. https://doi.org/10.3390/polym16243571.

Texte intégral

Résumé :

A fully bio-based polyester polyol based on isosorbide (ISB) and dimer fatty acid (DA) was synthesized through esterification. An ISB-based polyester polyol (DIS) was developed to synthesize a bio-based polyurethane elastomer (PUE) with enhanced mechanical and self-healing properties. The rigid bicyclic structure of ISB improved tensile properties, while the urethane bonds formed between the hydroxyl groups in ISB and isocyanate exhibited reversible characteristics at elevated temperatures, significantly enhancing the self-healing performance of DIS-based PUE compared to the control PUE (self-

Styles APA, Harvard, Vancouver, ISO, etc.

16

Rajput, Bhausaheb S., Thien An Phung Hai, and Michael D. Burkart. "High Bio-Content Thermoplastic Polyurethanes from Azelaic Acid." Molecules 27, no. 15 (2022): 4885. http://dx.doi.org/10.3390/molecules27154885.

Texte intégral

Résumé :

To realize the commercialization of sustainable materials, new polymers must be generated and systematically evaluated for material characteristics and end-of-life treatment. Polyester polyols made from renewable monomers have found limited adoption in thermoplastic polyurethane (TPU) applications, and their broad adoption in manufacturing may be possible with a more detailed understanding of their structure and properties. To this end, we prepared a series of bio-based crystalline and amorphous polyester polyols utilizing azelaic acid and varying branched or non-branched diols. The prepared p

Styles APA, Harvard, Vancouver, ISO, etc.

17

Zhang, Junrui, Guojun Jiang, Tianhao Huang, Jun Xie, and Da Shi. "Preparation and characterization of polyurethane–silica hybrid films." Pigment & Resin Technology 48, no. 5 (2019): 357–62. http://dx.doi.org/10.1108/prt-03-2019-0029.

Texte intégral

Résumé :

Purpose The paper aims to provide a facile approach to the synthesis of polyurethane–silica nanocomposites by introducing self-made aqueous silica sols with different particle sizes into polyurethane materials. This paper investigates the effects of the silica nanoparticles on the polyester polyol, as well as the physical properties and transmittance of the hybrid polyurethane coatings. Design/methodology/approach Colloidal silica particles of different sizes were obtained using a sol–gel process and were then embedded into polyester polyol by in-situ polymerization. These polyester polyol–sil

Styles APA, Harvard, Vancouver, ISO, etc.

18

Khannanov, Artur, Anastasia Burmatova, Klara Ignatyeva, et al. "Effect of the Synthetic Approach on the Formation and Magnetic Properties of Iron-Based Nanophase in Branched Polyester Polyol Matrix." International Journal of Molecular Sciences 23, no. 23 (2022): 14764. http://dx.doi.org/10.3390/ijms232314764.

Texte intégral

Résumé :

This article shows the success of using the chemical reduction method, the polyol thermolytic process, the sonochemistry method, and the hybrid sonochemistry/polyol process method to design iron-based magnetically active composite nanomaterials in a hyperbranched polyester polyol matrix. Four samples were obtained and characterized by transmission and scanning electron microscopy, infrared spectroscopy and thermogravimetry. In all cases, the hyperbranched polymer is an excellent stabilizer of the iron and iron oxides nanophase. In addition, during the thermolytic process and hybrid method, the

Styles APA, Harvard, Vancouver, ISO, etc.

19

Shafiq, Muhammad, Muhammad Taqi Zahid Butt, and Shahzad Maqsood Khan. "Synthesis of Mono Ethylene Glycol (MEG)-Based Polyurethane and Effect of Chain Extender on Its Associated Properties." Polymers 13, no. 19 (2021): 3436. http://dx.doi.org/10.3390/polym13193436.

Texte intégral

Résumé :

This study depicts the investigations of the effect of composition of aromatic polyester polyol produced from terephthalic acid (TPA) and different concentrations of mono ethylene glycol (mEG) as a chain extender on the mechanical properties of polyurethane (PU) elastomer. Aromatic polyester polyols are prepared via the poly-esterification of adipic acid, terephthalic acid, catalyst, and mono ethylene glycol; while a polyurethane elastomer is formulated via the pre-polymerization of polyol with pure monomeric Methylene diphenyl diisocyanate (MDI.) Mechanical properties of polyurethane elastome

Styles APA, Harvard, Vancouver, ISO, etc.

20

Paez-Amieva, Yuliet, and José Miguel Martín-Martínez. "Dynamic Non-Covalent Exchange Intrinsic Self-Healing at 20 °C Mechanism of Polyurethane Induced by Interactions among Polycarbonate Soft Segments." Polymers 16, no. 7 (2024): 924. http://dx.doi.org/10.3390/polym16070924.

Texte intégral

Résumé :

Two polyurethanes (PUs) were similarly synthesized by reacting a cycloaliphatic isocyanate with 1,4-butanediol and two polyols of different nature (polyester, polycarbonate diol) with molecular weights of 1000 Da. Only the PU synthesized with polycarbonate diol polyol (YCD) showed intrinsic self-healing at 20 °C. For assessing the mechanism of intrinsic self-healing of YCD, a structural characterization by molecular weights determination, infrared and X-ray photoelectronic spectroscopies, differential scanning calorimetry, X-ray diffraction, thermal gravimetric analysis, and dynamic mechanical

Styles APA, Harvard, Vancouver, ISO, etc.

21

Zhang, Meng, Li Qiang Zhang, and Yong Hong Zhou. "Preparation and Characterization of Polyurethane Foams from Modified Rosin-Based Polyether Polyol." Advanced Materials Research 887-888 (February 2014): 727–30. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.727.

Texte intégral

Résumé :

Rosin based polyether polyols were synthesized from rosin formaldehyde adduct, propylene epoxide and ethylene epoxide in the presence of catalyst. Rigid polyurethane foams (PUFs) were prepared with these rosin-based polyols and compared with foam made with an industrial polyether polyol (TC-4110) and rosin-based polyester polyols. The mechanical and thermal properties of foams were analyzed by some methods. The experimental results show that the foaming behavior for the foams prepared from such rosin based polyether polyols is similar to that of industrial products, but the reaction activities

Styles APA, Harvard, Vancouver, ISO, etc.

22

Moyano-Vallejo, Alejandra, María Pilar Carbonell-Blasco, Carlota Hernández-Fernández, Francisca Arán-Aís, María Dolores Romero-Sánchez, and Elena Orgilés-Calpena. "Enhanced Green Strength in a Polycarbonate Polyol-Based Reactive Polyurethane Hot-Melt Adhesive." Polymers 16, no. 23 (2024): 3356. http://dx.doi.org/10.3390/polym16233356.

Texte intégral

Résumé :

This study aimed to enhance the initial adhesion performance of reactive polyurethane hot-melt adhesives by using a bio-based polycarbonate polyol instead of traditional polyester or polyether polyols and by incorporating thermoplastic polyurethane (TPU) in varied proportions. Adhesives synthesized from bio-based polycarbonate polyols and polypropylene glycol with MDI as the isocyanate were characterized chemically, thermally, and mechanically (FTIR, DSC, plate–plate rheology, DMA, and T-peel strength test). Adding 10–15 wt.% TPU significantly improved green strength and initial adhesion at ro

Styles APA, Harvard, Vancouver, ISO, etc.

23

Sonnabend, Maresa, Suzanne G. Aubin, Annette M. Schmidt, and Marc C. Leimenstoll. "Sophorolipid-Based Oligomers as Polyol Components for Polyurethane Systems." Polymers 13, no. 12 (2021): 2001. http://dx.doi.org/10.3390/polym13122001.

Texte intégral

Résumé :

Due to reasons of sustainability and conservation of resources, polyurethane (PU)-based systems with preferably neutral carbon footprints are in increased focus of research and development. The proper design and development of bio-based polyols are of particular interest since such polyols may have special property profiles that allow the novel products to enter new applications. Sophorolipids (SL) represent a bio-based toolbox for polyol building blocks to yield diverse chemical products. For a reasonable evaluation of the potential for PU chemistry, however, further investigations in terms o

Styles APA, Harvard, Vancouver, ISO, etc.

24

Tarnawski, Wiesław, Mateusz Tokarski, and Wiktoria Czernecka. "Influence of terephthalic and orthophthalic units on the properties of polyols and polyurethane foams." Polimery 68, no. 6 (2023): 337–43. http://dx.doi.org/10.14314/polimery.2023.6.5.

Texte intégral

Résumé :

The effect of aromatic ring substitution in the polyester polyol molecule on its physicochemicalproperties and on the conditions of synthesis, fire resistance and thermal stability of polyurethanefoams was investigated. The greater number of terephthalic units in the polyol results in greater viscosityand reactivity during foam formation. The obtained foams were characterized by higher thermalstability (TGA) and fire resistance (oxygen index, single flame test).

Styles APA, Harvard, Vancouver, ISO, etc.

25

Rajić, Ivona, Emi Govorčin Bajsić, and Tamara Holjevac Grgurić. "Application of polyurethane in the production of shoe soles." Koža & obuća 69, no. 1 (2021): 7–9. http://dx.doi.org/10.34187/ko.69.1.2.

Texte intégral

Résumé :

Good footwear should be comfortable, long-lasting and fit for purpose, polyurethanes allow designers to meet all of these objectives. Polyurethanes are used in the footwear industry to make insoles and shoe soles.There are two types of PU soles a polyether and polyester based PU sole. Polyether based PU soles have a high resistance against hydrolysis and low oil resistance while polyester based PU soles have a low resistance against hydrolysis and high oil resistance. In this work thermal and mechanical properties of PU elastomers with polyether and polyester polols with different hard segment

Styles APA, Harvard, Vancouver, ISO, etc.

26

ABDUL JALAL, TARAQ. "LINKED UNSATURATED POLYESTER BLENDED WITH POLYOL (HTPBO)." Journal of University of Anbar for Pure Science 1, no. 2 (2007): 126–39. http://dx.doi.org/10.37652/juaps.2007.15273.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

27

Mesias, Ricardo, and Edwin A. Murillo. "Hyperbranched polyester polyol modified with polylactic acid." Journal of Applied Polymer Science 132, no. 10 (2014): n/a. http://dx.doi.org/10.1002/app.41589.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

28

Ristić, Ivan, Suzana Cakić, Nevena Vukić, Vesna Teofilović, Jelena Tanasić, and Branka Pilić. "The Influence of Soft Segment Structure on the Properties of Polyurethanes." Polymers 15, no. 18 (2023): 3755. http://dx.doi.org/10.3390/polym15183755.

Texte intégral

Résumé :

A series of polyurethanes (PU) were synthesised via one-step polymerisation without a chain extender, using toluene diisocyanate as well as a variety of soft segments composed of different macrodiols. Poly(D,L-lactide) (PDLLA) and polycaprolactone diol (PCL) were synthesised as a polyester type polyols to obtain soft segments. The process of varying the molar ratio of newly synthesised PDLLA in soft segments has been confirmed as a powerful tool for fine-tuning the final properties of PU. Fourier-transformed infrared spectroscopy was used for evaluation of molecular structures of synthesised P

Styles APA, Harvard, Vancouver, ISO, etc.

29

Somisetti, Varaprasad, Shaik Allauddin, Ramanuj Narayan, and K. V. S. N. Raju. "Synthesis of a novel glycerol based B3-type monomer and its application in hyperbranched polyester urethane–urea coatings." RSC Advances 5, no. 90 (2015): 74003–11. http://dx.doi.org/10.1039/c5ra11712g.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

30

Simioni, F., M. Modesti, and C. A. Brambilla. "Polyester Polyols from Microcellular Elastomer Scrap for Rigid Polyurethane and Polyisocyanurate Foam Production." Cellular Polymers 8, no. 5 (1989): 387–400. http://dx.doi.org/10.1177/026248938900800503.

Texte intégral

Résumé :

Glycolysis products from microcellular elastomer polyurethane were used in the preparation of PUR-PIR rigid foams. Foams were generally good but, with a low NCO index, showed insufficient dimensional stability. The foam stability can be improved by an increase in the crosslinking density of the polymer, by using polyol components with an increased functionality or by increasing the isocyanurate content. The improved crosslinking induced by trimerisation is more efficient for stability than that derived by higher polyol functionality. The use of MDI with a high average functionality and glycoly

Styles APA, Harvard, Vancouver, ISO, etc.

31

Ma, Rong Yao, and Yu Hua Yi. "Study on Thermal Stability and Aging Resistance of High Hardness Polyurethane Elastomer via Thermal Analysis." Advanced Materials Research 849 (November 2013): 261–64. http://dx.doi.org/10.4028/www.scientific.net/amr.849.261.

Texte intégral

Résumé :

In this study, the role of chemical soft segment (SS) constructions in thermal and mechanical properties of the elastomers has been investigated by choosing two types of polyol, a polyester and a polyether. Also the effect of the hard segment (HS) chemical construction has been studied. The result showed that compared with polyether based PUs, polyester based PUs have better thermal stability under nitrogen atmosphere. However, the difference for the aging resistance performance of PUs based on polyester and polyether is not obvious without oxidation impact.

Styles APA, Harvard, Vancouver, ISO, etc.

32

Paez-Amieva, Yuliet, Noemí Mateo-Oliveras, and José Miguel Martín-Martínez. "Polyurethanes Synthesized with Blends of Polyester and Polycarbonate Polyols—New Evidence Supporting the Dynamic Non-Covalent Exchange Mechanism of Intrinsic Self-Healing at 20 °C." Polymers 16, no. 20 (2024): 2881. http://dx.doi.org/10.3390/polym16202881.

Texte intégral

Résumé :

Polyurethanes (PUs) synthesized with blends of polycarbonate and polyester polyols (CD+PEs) showed intrinsic self-healing at 20 °C. The decrease in the polycarbonate soft segments content increased the self-healing time and reduced the kinetics of self-healing of the PUs. The percentage of C-O species decreased and the ones of C-N and C=O species increased by increasing the polyester soft segments in the PUs, due to higher micro-phase separation. All PUs synthetized with CD+PE blends exhibited free carbonate species and interactions between the polycarbonate and polyester soft segments to a so

Styles APA, Harvard, Vancouver, ISO, etc.

33

Caschera, Alexander, Tristan Calayan, Nicola Piccolo, Adel Kakroodi, Jason James Robinson, and Guerino Sacripante. "Degradation of Bioderived Polyurethane Composites by Spectroscopy in ISO20200 Composting Conditions." Polymers 16, no. 14 (2024): 2071. http://dx.doi.org/10.3390/polym16142071.

Texte intégral

Résumé :

Polyurethane foam compositions derived from bioderived polyester polyols with various additives were evaluated for disintegration under composting conditions using the ISO 20200 standard and were characterized by thermogravimetric analysis, microscopy, infrared spectroscopy, and imaging to provide additional insight. Compared to polyether polyol-based polyurethanes, the bioderived polyurethanes were found to display increased disintegration with an average mass loss of 25.4 ± 3.6 weight percent when subjected to composting conditions for 45 days, suggesting that these materials are less likely

Styles APA, Harvard, Vancouver, ISO, etc.

34

ÇELEBİ, MİTHAT, and Tugba Yazici. "SYNTHESIS AND CHARACTERIZATION OF BIO-BASED POLYESTER POLYOL." Journal of the Turkish Chemical Society, Section A: Chemistry 3, no. 3 (2016): 721. http://dx.doi.org/10.18596/jotcsa.287306.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

35

lee, Choy Sin, and Song Cang Lee. "Preparation of Polyester Polyol from Epoxidized Palm Olein." Chinese Journal of Chemistry 29, no. 4 (2011): 840–46. http://dx.doi.org/10.1002/cjoc.201190167.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

36

Mun, Sung Phil. "Hydroxypropylation of Polyphenol-Rich Alkaline Extracts from Pinus radiata Bark and Their Physicochemical Properties." Molecules 27, no. 24 (2022): 9002. http://dx.doi.org/10.3390/molecules27249002.

Texte intégral

Résumé :

Pinus radiata bark is a rich source of polyphenols, which are mainly composed of proanthocyanidins. This study aimed to utilize P. radiata bark as a polyol source for bio-foam production in the future. Polyphenol-rich alkaline extracts (AEs) from P. radiata bark were prepared by mild alkaline treatment and then derivatized with propylene oxide (PO). Hydroxypropylated alkaline extracts (HAEs) with varying molar substitutions (MS 0.4–8.0) were characterized by FT-IR, NMR, GPC, TGA, and DSC. The hydroxyl value and solubility in commercial polyols were also determined. The molecular weights of the

Styles APA, Harvard, Vancouver, ISO, etc.

37

Zou, Jian Guo, Shi Ying Liu, Yong Yi Cao, and Zhi Hong Zhang. "Research on Synthesis Technology of Polyester Diol Using Vacuum Melting Method." Advanced Materials Research 988 (July 2014): 45–48. http://dx.doi.org/10.4028/www.scientific.net/amr.988.45.

Texte intégral

Résumé :

Using adipic acid, ethylene glycol and diethylene glycol as the main raw material, the polyester diol was prepared by vacuum melting method. The effects of the dosage of catalyst, the stuff molar ratio of diol and diacid, reaction temperature of the esterification reaction and other factors on the synthesis process of polyester diol were investigated. The optimal conditions of the polyester diol synthesis by vacuum melting method were determined as follows: the stuff molar ratio of diol and diacid 1.10:1, the dosage of catalyst 0.20‰ (the mass fraction of total amount of dicarboxylic acid and

Styles APA, Harvard, Vancouver, ISO, etc.

38

Chen, Shuang Lian, Guang Xue Chen, and Jiang Wen Liu. "Study on an Aliphatic Polyurethane Laminating Adhesive Based on Castor Oil." Applied Mechanics and Materials 262 (December 2012): 551–56. http://dx.doi.org/10.4028/www.scientific.net/amm.262.551.

Texte intégral

Résumé :

The first component of the Polyurethane adhesive was prepared with polyester polyol, polyether polyol ,castor oil and isophorone diisocyanate. And this component was mixed with the castor oil and its modified production to prepare a two-component solvent-free aliphatic polyurethane laminating adhesive. In this study, the influences of the copolymerization ratio of polyester/ether on viscosity, heat resistance, adhesion strength and boiling resistance were studied, as well as influences of castor oil and its modified production on curing speed and adhesion strength. The results showed that when

Styles APA, Harvard, Vancouver, ISO, etc.

39

Storozhek, G. O., M. B. Alikin, D. A. Panfilov, N. A. Lavrov, and I. M. Dvorko. "Obtaining unsaturated polyester resins using products of recycled polyethylene terephthalate solvolysis." Plasticheskie massy, no. 3 (July 22, 2024): 39–41. http://dx.doi.org/10.35164/0554-2901-2024-03-39-41.

Texte intégral

Résumé :

A technique for obtaining an unsaturated polyester resin based on recycled polyethylene terephthalate has been developed. The process of curing an unsaturated polyester resin under the action of styrene, a peroxide compound (Butanox 50M) and an accelerator (cobalt ortoate) has been studied. The physical and mechanical properties of polymeric materials based on the developed resin have been studied, it was found that their strength depends on the mass fraction of recycled polyethylene terephthalate in the oligoether polyol used in the synthesis.

Styles APA, Harvard, Vancouver, ISO, etc.

40

Yeoh, Fang Hoong, Choy Sin Lee, Yew Beng Kang, Shew Fung Wong, Sit Foon Cheng, and Wei Seng Ng. "Production of Biodegradable Palm Oil-Based Polyurethane as Potential Biomaterial for Biomedical Applications." Polymers 12, no. 8 (2020): 1842. http://dx.doi.org/10.3390/polym12081842.

Texte intégral

Résumé :

Being biodegradable and biocompatible are crucial characteristics for biomaterial used for medical and biomedical applications. Vegetable oil-based polyols are known to contribute both the biodegradability and biocompatibility of polyurethanes; however, petrochemical-based polyols were often incorporated to improve the thermal and mechanical properties of polyurethane. In this work, palm oil-based polyester polyol (PPP) derived from epoxidized palm olein and glutaric acid was reacted with isophorone diisocyanate to produce an aliphatic polyurethane, without the incorporation of any commercial

Styles APA, Harvard, Vancouver, ISO, etc.

41

Du, Xun Jun, Han Zhou Sun, Yu Xiong Wu, et al. "Synthesis of Tung Oil Anhydride-Ester Polyol." Advanced Materials Research 418-420 (December 2011): 693–97. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.693.

Texte intégral

Résumé :

Tung oil is a special biomass resource in China. Tung Oil has the characteristic to be transformed into serial derivatives for its active Conjugated double bond. Especially, tung oil anhydride-ester polyol (TOAEP) can be used as substitute of polyester polyol and/or polyether polyol in the synthesis and modification of polyurethane materials. Through esterification and transesterification, methyl-α-eleostearate-maleic anhydride adduct (MEMAA), a derivative of tung oil, was reacted with ethylene glycol and tung oil anhydride-ester polyol (TOAEP) was obtained. The optimal preparation condition a

Styles APA, Harvard, Vancouver, ISO, etc.

42

Storozhek, G. O., M. B. Alikin, D. A. Panfilov, N. A. Lavrov, and I. M. Dvorko. "Obtaining unsaturated polyester resins using recycled polyethylene terephthalate." Plasticheskie massy 1, no. 5-6 (2023): 41–43. http://dx.doi.org/10.35164/0554-2901-2023-5-6-41-43.

Texte intégral

Résumé :

A method for obtaining an unsaturated polyester resin based on recycled polyethylene terephthalate has been developed. The process of curing an unsaturated polyester resin under the action of styrene, a peroxide compound (Butanox 50M) and an accelerator (cobalt stearate and dimethylaniline) has been studied. The physical and mechanical properties of polymeric materials based on the developed resin have been studied. It has been established that their strength depends on the mass fraction of recycled polyethylene terephthalate in the oligoether polyol used in the synthesis.

Styles APA, Harvard, Vancouver, ISO, etc.

43

Sendijarevic, V., A. Sendijarevic, H. Lekovic, et al. "Heat Resistant Isocyanate Based Foams for Structural Applications." Cellular Polymers 10, no. 3 (1991): 213–26. http://dx.doi.org/10.1177/026248939101000303.

Texte intégral

Résumé :

This paper describes unique types of isotropic urethane-isocyanurate and urethane-urea isocyanurate foams based on a combination of an aromatic polyester polyol and an amine-containing tetrol as the only polyols with a low functionality polymeric isocyanate. The effects of isocyanate index, foam density, and curing temperature, as well as the mode of foaming (free-rise versus moulded) on the foam properties, were studied. The foam isotropy index, defined as the ratio of compressive strength parallel and perpendicular to the foam rise, was 1.0 (ideal). The normalized compressive strength (paral

Styles APA, Harvard, Vancouver, ISO, etc.

44

Khoon Poh, Ang, Lee Choy Sin, Cheng Sit Foon, and Chuah Cheng Hock. "Polyurethane wood adhesive from palm oil-based polyester polyol." Journal of Adhesion Science and Technology 28, no. 11 (2014): 1020–33. http://dx.doi.org/10.1080/01694243.2014.883772.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

45

Farias, E. D., M. C. G. Passeggi, and V. Brunetti. "Thermal transitions in hyperbranched polyester-polyol assemblies on carbon." European Polymer Journal 102 (May 2018): 68–74. http://dx.doi.org/10.1016/j.eurpolymj.2018.03.021.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

46

Singh, Ashish Pratap, C. Suryanarayana, R. Baloji Naik, and G. Gunasekaran. "Development of hyperbranched polyester polyol-based waterborne anticorrosive coating." Journal of Coatings Technology and Research 13, no. 1 (2015): 41–51. http://dx.doi.org/10.1007/s11998-015-9720-1.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

47

Jiang, Lin, Qiang Xu, and Chun Pu Hu. "Preparation and Characterization of Waterborne Polyurethaneurea Composed of Dimer Fatty Acid Polyester Polyol." Journal of Nanomaterials 2006 (2006): 1–10. http://dx.doi.org/10.1155/jnm/2006/14906.

Texte intégral

Résumé :

A series of polyurethaneurea (PUU) aqueous dispersions, which were stable at ambient temperature for more than 1 year, were prepared with C36-dimer-fatty-acid-based polyester polyol, isophorone diisocyanate, dimethylol propionic acid, and ethylenediamine. The particle size of all these PUU (DPU) aqueous dispersions (<100nm) was less than that of comparable specimens, that is, poly-(neopentyl glycol adipate) polyester-polyol-based PUU (APU) aqueous dispersions, and the polydispersity index was very narrow (≤1.13). The films prepared with the DPU aqueous dispersions exhibited excellent waterp

Styles APA, Harvard, Vancouver, ISO, etc.

48

Ernzen, Juliano R., José A. Covas, Angel Marcos-Fernández, Rudinei Fiorio, and Otávio Bianchi. "Soybean-Based Polyol as a Substitute of Fossil-Based Polyol on the Synthesis of Thermoplastic Polyurethanes: The Effect of Its Content on Morphological and Physicochemical Properties." Polymers 15, no. 19 (2023): 4010. http://dx.doi.org/10.3390/polym15194010.

Texte intégral

Résumé :

Thermoplastic polyurethanes (TPUs) are remarkably versatile polymers due to the wide range of raw materials available for their synthesis, resulting in physicochemical characteristics that can be tailored according to the specific requirements of their final applications. In this study, a renewable bio-based polyol obtained from soybean oil is used for the synthesis of TPU via reactive extrusion, and the influence of the bio-based polyol on the multi-phase structure and properties of the TPU is studied. As raw materials, 4,4′-diphenylmethane (MDI), 1,4-butanediol, a fossil-based polyester poly

Styles APA, Harvard, Vancouver, ISO, etc.

49

Burmatova, Anastasia, Artur Khannanov, Alexander Gerasimov, et al. "A Hyperbranched Polyol Process for Designing and Manufacturing Nontoxic Cobalt Nanocomposite." Polymers 15, no. 15 (2023): 3248. http://dx.doi.org/10.3390/polym15153248.

Texte intégral

Résumé :

A method for the design and synthesis of a metallopolymer composite (CoNP) based on cobalt nanoparticles using the hyperbranched polyol process was developed. It was shown that hyperbranched polyester polyols in a melted state can be both a reducing agent and a stabilizer of metal nanoparticles at the same time. The mechanism of oxidation of hyperbranched polyol was studied using diffuse reflectance IR spectroscopy. The process of oxidation of OH groups in G4-OH started from 90 °C and finished with the oxidation of aldehyde groups. The composition and properties of nanomaterials were determine

Styles APA, Harvard, Vancouver, ISO, etc.

50

Eun, Jong Hyun, and Joon Seok Lee. "Study on the NCO index and base knitted fabric substrates on the thermal, chemical, and mechanical properties of solvent-less formulations polyurethane artificial leather." Journal of Engineered Fibers and Fabrics 15 (January 2020): 155892502091645. http://dx.doi.org/10.1177/1558925020916458.

Texte intégral

Résumé :

In this article, we have studied the thermal, chemical, and mechanical properties of the polyurethane artificial leather. Polyurethane artificial leathers were made from polyol, diisocyanate, chain extender, a catalyst, polyester circular knitted fabric, and warp knitted fabric. After manufacturing the artificial leathers, the properties of six different samples were investigated according to the NCO index. The equivalence ratios of the isocyanates to polyols containing a hydroxyl group are referred to as the NCO index. Samples were synthesized with an NCO index of 1.0, 1.4, and 1.8 by changin

Styles APA, Harvard, Vancouver, ISO, etc.

Nous offrons des réductions sur tous les plans premium pour les auteurs dont les œuvres sont incluses dans des sélections littéraires thématiques. Contactez-nous pour obtenir un code promo unique!