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High T g and tough poly(butylene 2,5‐thiophenedicarboxylate‐ co ‐1,4‐cyclohexanedimethylene 2,5‐thiophenedicarboxylate)s: Synthesis and characterization
Author(s) -
Wang Guoqiang,
Liang Yin,
Jiang Min,
Zhang Qiang,
Wang Rui,
Wang Honghua,
Zhou Guangyuan
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48634
Subject(s) - glass transition , differential scanning calorimetry , materials science , thermogravimetric analysis , polyester , thermal stability , polymer chemistry , amorphous solid , ultimate tensile strength , polymer , composite material , chemical engineering , crystallography , chemistry , thermodynamics , physics , engineering
The purpose of this study was to enhance the glass‐transition temperature of poly(butylene 2,5‐thiophenedicarboxylate) (PBTF). A series of poly(butylene‐ co ‐1,4‐cyclohexanedimethylene 2,5‐thiophenedicarboxylate)s (PBCTFs) were synthesized from 2,5‐thiophenedicarboxylic acid, 1,4‐cyclohexanedimethanol (CHDM), and 1,4‐butanediol. CHDM can increase the chain rigidity and lead the β relaxation temperature shift to lower temperature. Consequently, PBCTFs showed not only the high glass‐transition temperature, but also high elongations at break. PBTF was a crystalline polyester. However, differential scanning calorimetry and wide‐angle X‐ray diffraction results suggested PBCTFs were amorphous polyesters. Thermogravimetric analysis results indicated the thermal stability of copolyesters was gradually enhanced with increasing the CHDM content. When the CHDM content was 95 mol %, PBCTF95 exhibited high glass‐transition temperature (69.2 °C), tensile strength (44.4 MPa), and elongation at break (205%). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48634.