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preparation and properties of aromatic polyester

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preparation and properties of aromatic polyester

1999-7-1 · Read "Preparation and properties of new wholly aromatic polyesters containing a terphenyl analogue of 1,3,4‐thiadiazole in the main chain, Macromolecular Rapid Communications" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.


Most of the polyimides obtained by chemical cyclodehydration procedure were found to soluble in DMF, NMP, o ‐chlorophenol, and m ‐cresol. The Tg s of these polyimides were in the 260–328°C range and showed almost no weight loss up to 500°C under air and nitrogen atmosphere. © …


The molding properties of molding compounds based on wholly aromatic polyesters are improved by the addition to such wholly aromatic polyester compositions of a minor amount of an aromatic polyester which is a combination of the following units: ##STR1## Where; p=0 to …


2020-5-15 · They have high softening points (480 - 630 K), good dielectric strength, excellent mechanical properties, and good heat resistance. For example, the aromatic polyester produced by the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid (Vectran LCP) is on a pound-for-pound basis five times stronger than steel.


Moreover, the cycloaliphatic or aromatic structure of polyol dispersion has a significant effect on properties of 2K-WPU coating, such as hardness, water resistance, thermal stability and so on [7]. The cycloaliphatic and aromatic compounds for the preparation of polyol dispersion derive mainly from nonrenewable fossil resource.


2000-8-25 · Preparation and Properties of Novel Triphenylpyridine-Containing Hyperbranched Polyimides Derived from 2,4,6-Tris(4-aminophenyl)pyridine under Microwave Irradiation. Macromolecular Chemistry and Physics 2010 , 211 (16) , 1803-1813.


Preparation and characterization of an aromatic polyester/polyaniline composite and its improved counterpart . ... PBT-g-MA/PANI composites exhibited noticeably superior mechanical properties compared with those of PBT/PANI due to greater compatibility with the added PANI. The antibacterial and antistatic properties of the composites were also ...


on the preparation of aromatic polyester nanocomposites with TiO 2 as filler. The addition of TiO 2 nanoparticles (rutile phase) in the polymeric matrix can improve properties such as anti-corrosion, anti-bactericidal, UV protection among others15. A recent work described the preparation of a non-woven PET hybrid nanocomposite on which was made


properties (penetration, softening point, elastic recovery, etc.) by modification with polyester polyols. Based on this consideration, firstly, PET waste was depolymerized by glycolysis reaction and the obtained BHET was used for the synthesis of polyester. The effect of polyester polyol structure on the PMB’s characteristics was investigated.


2010-3-7 · In this study, series of biodegradable polyesters, that is aliphatic homopolyesters PBA, PBS, and aliphatic-aromatic copolyester PBAT were synthesized by melt polycondensation. The blends of PLA and these biodegradable polyesters were prepared using a twin screw extruder. The mechanical and thermal properties of the blends were investigated. 2.


2015-2-26 · Preparation and Properties of Aromatic Pol yamides from 2,2'-Bibenzoic Acid and Aromatic Diamines GUEY-SHENG LIOU, YOSHlYUKl OISHI, MASA-AKI KAKIMOTO, and YOSHIO lMAl Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Meguro-ku, Tokyo 152, Japan SYNOPSIS


Preparation and properties of some fluoroaliphatic-aromatic polyesters incorporating fluoroaliphatic ether units in the main chain Feast, W. J. Musgrave, W. K. R.


2020-8-3 · A series of new aromatic Polyesters were synthesized by polycondensation of various aromatic monomers di ,tri and tetra diols (BCAHPMNM , BHPMB, BHPPB , BPBHP) with Acids(4,4Azo Di benzoic acid and Adipic acid) using dibutyltine dilaurate as Catalyst .all polyesters(P.E1-P.E4)containing pyridine heterocyclic


2018-2-19 · Hyperbranched aromatic polyamide-silica composites were prepared using the sol-gel method, starting from tetraethoxysilane (TEOS). Three methods were employed for the preparation of the composites. The first method involves adding TEOS to the solution of hyperbranched aromatic polyamide in the mixture of DMF and formic acid (DMF method).


2000-2-9 · the grafting products decreased greatly compared with the raw polyester. The influence of the molecular structure of the grafted polyester was not observed. The effect of composition of the grafted polymers was discussed. Mechanical properties varied with the composition of the side chain. In the case of grafting onto aromatic polyesters,


Polyester may be produced in numerous forms. For example, polyester as a thermoplastic may be heated and processed into different forms and shapes, e.g., fibers, sheets and three-dimensional shapes. While combustible at high temperatures, polyester tends to shrink away from flames and self-extinguishes.


2021-6-7 · Preparation and properties of an aromatic polyamide fibre derived from a bio-based furan acid chloride Kaikai Cao, Yufeng Liu, Feng Yuan, You Yang, Jin Wang, Zhicheng Song, Zhongliang Li, Wei Wu, Mengjin Jiang, and Jun Yang


2020-7-20 · In this study, hollow glass beads (HGB) were introduced into an aromatic thermosetting polyester (ATPE) based foam to prepare HGB/ATPE composite foam, and effect of content of HGB and foaming conditions on the properties of HGB/ATPE composite foam were investigated. After modification, the specific strength of the HGB/ATPE composite foam can reach 26.2 MPa/(g·cm<sup>−3</sup>), …


1996-2-15 · The present invention relates to an improved process for the preparation of aromatic polyester is based on dialkyl esters of aromatic dicarboxylic acids and dihydric phenols. The invention more particularly relates to an improved process for the preparation of high molecular weight (Mn 12,000-15,000) aromatic polyester.


2017-5-24 · Keywords: polypropylene, thermoplastic polyester elastomer, blends, compatibilizer. Introduction Thermoplastic elastomers (TPE) are new materials having both elastic and plastic properties. Among the TPEs, a ther-moplastic polyester elastomer (TPEE), which


Aromatic–aliphatic random copolyamides of high molecular weights were prepared by the high‐temperature solution polycondensation from a combination of aromatic diisocyanates, 4,4′‐methylenedi(phenyl isocyanate), and 2,4‐tolylene diisocyanate, and a mixture of isophthalic acid and aliphatic dicarboxylic acids with 4–10 methylene groups.


2020-6-27 · Uses of benzene. It is used as a starting material for the preparation of varieties of aromatic compounds which are used for the manufacture of dyes, drugs, perfumes, explosives, etc. ( Eg. benzene is used for making toluene which is needed for making …


Preparation of Nylon Nylons are condensation copolymers and are prepared by reacting equal parts of a dicarboxylic acid and a diamine. Nylon 6, 6, made up of monomer units hexamethylenediamine and adipic acid is the most common variant of this synthetic fibre. ... Properties of Polyester Fibre. Now let's talk about some characteristics of ...


Aromatic polysters and copolyesters of high molecular weights with phenylindane units were prepared from combinations of 3-(4-hydroxyphenyl)-1,1,3-trimethyl-5-indanol and bisphenol A with isophthaloyl and terephthaloyl chloride by two-phase polycondensation in a nitrobenzene-water system with various phase-transfer catalysts.


1984-6-1 · Preparation and properties of aromatic polyesters and copolyesters containing phenylindane unit Imai, Yoshio; Tassavori, Shahrzad 1984-06-01 00:00:00 Aromatic polyesters and copolyesters of high molecular weights with phenylindane units were and prepared from combinations of 3-(4-hydroxyphenyl)-l,l,3-trimethyl-5-indanol bisphenol A with ...


Preparation and properties of aromatic polyester/TiO2 nanocomposites from polyethylene terephthalate By Leonardo Moreira dos Santos, Carlos Leonardo Pandolfo Carone, Sandra Mara Oliveira Einloft and Rosane Angélica Ligabue


1984-6-1 · Preparation and properties of aromatic polyesters and copolyesters containing phenylindane unit Imai, Yoshio; Tassavori, Shahrzad; Abstract. Publication: Journal of Polymer Science A Polymer Chemistry. Pub Date: June 1984 DOI: 10.1002/pol.1984.170220612 Bibcode: 1984JPoSA..22.1319I ...


2012-3-20 · 2.4. Preparation of composite materials The composites were prepared using a ‘Plasto-graph’ 200 Nm W50EHT mixer with a blade-type rotor (C.W. Brabender Instruments, Inc., Hacken-sack, NJ). Prior to composite formation, PANI sam-ples were dried in a vacuum oven at 50–60°C for 2 days. Composites of PBT/PANI or PBT-g-MA/


Preparation and properties of aromatic polyesters and copolyesters containing phenylindane unit Imai, Yoshio; Tassavori, Shahrzad; Abstract. Publication: Journal of Polymer Science A Polymer Chemistry. Pub Date: June 1984 DOI: 10.1002/pol.1984.170220612 Bibcode: 1984JPoSA..22.1319I ...


Preparation and Properties of Polyester Based Nanocomposites with Good Air-tightness Fusheng Luo Department of Chemical Engineering, Huizhou University Guangdong 516007, China Tel: 86-752-252-7229 E-mail: [email protected] The research is financed by China National key fundamental Research Foundation (2004CB217808) and Scientific


Aromatic polysters and copolyesters of high molecular weights with phenylindane units were prepared from combinations of 3-(4-hydroxyphenyl)-1,1,3-trimethyl-5-indanol and bisphenol A with isophthaloyl and terephthaloyl chloride by two-phase polycondensation in a nitrobenzene-water system with various phase-transfer catalysts. The phenylindane-containing polyesters and copolyesters were ...


The technique used (in situ polymerization) to produce aromatic polyesters with addition of TiO 2 as a reinforcement was effective in the preparation of nanocomposites with improved thermal properties and hardness producing materials with different characteristics.


Preparation and properties of polyester–urethane block copolymers Preparation and properties of polyester–urethane block copolymers Iwakura, Yoshio; Taneda, Yasuo; Uchida, Shinya 1961-01-01 00:00:00 Polyester–urethane block copolymers were prepared by the block polyaddition reaction of diisocyanate with two kinds of linear polyesters, one of which was polyethylene terephthalate.


2012-3-20 · Preparation and characterization of an aromatic polyester/polyaniline composite and its improved counterpart ... described the properties of their conductive core-shell particles upon incorporation into epoxy-based composites. This study focuses on the effects of


2.2 Preparation of DA and polyester. About 10 g of SO was added into a three-necked flask with 5 ml of acetate buffer. Then, 20 ml of acetone and ethanol with a ratio of 1:1 was added to the flask. By titration with 0.1 n KOH aqueous solution, the total fatty acid generated in the mixture was determined.


1984-6-1 · Preparation and properties of aromatic polyesters and copolyesters containing phenylindane unit Imai, Yoshio; Tassavori, Shahrzad 1984-06-01 00:00:00 Aromatic polyesters and copolyesters of high molecular weights with phenylindane units were and prepared from combinations of 3-(4-hydroxyphenyl)-l,l,3-trimethyl-5-indanol bisphenol A with isophthaloyl and terephthaloyl chloride by …


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