摘要
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.
出处
《合成纤维》
CAS
北大核心
2005年第3期1-4,11,共5页
Synthetic Fiber in China
基金
国家自然科学基金资助(20174004)。
