热致晶体
对苯二甲酸
差示扫描量热法
材料科学
聚酯纤维
聚对苯二甲酸乙二醇酯
热稳定性
高分子化学
共聚酯
乙二醇
聚合物
缩聚物
傅里叶变换红外光谱
羟基苯甲酸
热重分析
化学工程
有机化学
复合材料
化学
液晶
物理
工程类
热力学
作者
Т. Р. Дебердеев,Alsu I. Akhmetshina,S. V. Grishin
出处
期刊:Key Engineering Materials
日期:2021-05-01
卷期号:887: 3-9
标识
DOI:10.4028/www.scientific.net/kem.887.3
摘要
The copolyesters derived from dimethyl ester of terephthalic acid, ethylene glycol, and 4-hydroxybenzoic acid (HBA) have been synthesized via catalytically promoted polycondensation omitting the acetylation step. FTIR spectroscopy results have evidenced an insertion of HBA along a polymer backbone. Of note, thermal gravimetric analysis has shown that the HBA moieties substantially improved the thermal stability of polyesters. As found by differential scanning calorimetry and polarizing microscopy, the copolyesters are capable of forming an anisotropic phase in a temperature range of 150-170 °C. Additionally, the free surface energy of the samples was determined to evaluate the compatibility of thermotropic copolyesters with other high-molecular compounds.
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