PET-PEG共聚物相变性能的研究Study on the Phase-change Properties of PET-PEG Copolymers
周光宇,胡吉,朱美芳,陈彦模,许文菊
ZHOU Guang-yu; HU Ji; ZHU Mei-fang; CHEN Yan-mo; XU Wen-ju(College of Material Science and Technology;
摘要(Abstract)：
通过共聚反应合成了聚乙二醇(PEG)相对分子质量不同及PEG含量不同的PET-PEG嵌段共聚物,以DSC法表征了共聚物在常温下的相变性能。结果表明:当用于共聚的PEG相对分子质量达到4000以上时,共聚物才具有良好的常温相变性能;且共聚物的相变焓随PEG含量的升高而升高,但PEG含量达到55%后相变焓反而下降。
PET-PEG copolymers with different PEG molecular block and PET-PEG cpolymers with different PEG contents were synthesized by copolymerization. The phase -change properties in the normal temperature were analyzed by DSC. It was concluded that the copolymers had improved phase-change properties after the molecular weight of PEG which was used in the copolymerization exceeded particular the true numerical value. The phase-change enthalpy of copolymers had been increasing with the increasing of PEG contents, but it would drop after the PEG contents exceeded the 50 percent.
关键词(KeyWords)：
相变;PET-PEG;嵌段共聚酯
phase-change, PET-PEG, copolyester
基金项目(Foundation): 国家自然科学基金资助(20174004)。
作者(Authors):
周光宇,胡吉,朱美芳,陈彦模,许文菊
ZHOU Guang-yu; HU Ji; ZHU Mei-fang; CHEN Yan-mo; XU Wen-ju(College of Material Science and Technology;
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