高校化学工程学报2024，Vol.38Issue(6)：909-915,7.DOI:10.3969/j.issn.1003-9015.2024.00.016
CET/CBT开环共聚酯的合成、结构和性能
Synthesis,structure and properties of CET/CBT ring-opening copolymerized polyesters
刘明 1王松林 2李院院 3高倩倩 1潘鹏举 1包永忠1
作者信息
- 1. 化学工程联合国家重点实验室(浙江大学),浙江大学 化学工程与生物工程学院,浙江 杭州 310058
- 2. 浙江恒逸石化有限公司,浙江 杭州 311029
- 3. 化学工程联合国家重点实验室(浙江大学),浙江大学 化学工程与生物工程学院,浙江 杭州 310058||浙江恒逸石化有限公司,浙江 杭州 311029
- 折叠
摘要
Abstract
Ring-opening copolymerization of cyclic ethylene terephthalate(CET)oligomer with cyclic butylene terephthalate(CBT)oligomer can reduce polymerization temperatures and produce polyesters with adjustable properties.Copolyesters were synthesized by ring-opening copolymerization using self-prepared CET and commercial CBT,and effects of CET/CBT mass ratios in feed monomer on molecular weights,compositions and sequence structure,crystallization,melting,and dynamic viscoelastic behavior of copolyesters were investigated.Copolyesters with high molecular weights can be prepared through ring-opening copolymerization of CET and CBT for 10 min at 300℃,especially for copolymerization system with CET mass fraction from 50%to 60%.When the ratio of w(CET)to w(CBT)is greater than or equal to 1:1,the molecular chain has a high degree of randomness.The copolyester with 50%mass fraction of CET has the lowest crystal melting temperature(181.1℃),while the copolyester with 70%mass fraction of CET has the lowest crystallization rate.The storage modulus and glass transition temperatures of copolyesters are increased as CET composition in copolyester increased.关键词
环状对苯二甲酸乙二醇酯低聚物/环状对苯二甲酸丁二醇酯低聚物/开环聚合/共聚酯/结晶Key words
cyclic ethylene terephthalate oligomer/cyclic butylene terephthalate oligomer/ring-opening polymerization/copolyester/crystallization分类
化学化工引用本文复制引用
刘明,王松林,李院院,高倩倩,潘鹏举,包永忠..CET/CBT开环共聚酯的合成、结构和性能[J].高校化学工程学报,2024,38(6):909-915,7.
