高等学校化学学报

高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (4): 642.

• 论文 • 上一篇    下一篇

长软链段对苯二甲酸乙二酯-环氧乙烷多嵌段共聚物的组成不均一性研究

罗筱烈, 张晓云, 王命泰, 马德柱   

  1. 中国科学技术大学材料科学与工程系, 合肥, 230026
  • 收稿日期:1996-04-15 出版日期:1997-05-24 发布日期:1997-05-24
  • 通讯作者: 罗筱烈, 女. 58岁, 教授.
  • 作者简介:罗筱烈, 女. 58岁, 教授.
  • 基金资助:

    国家自然科学基金;国家科委基础性研究重大关键项目

Compositional Heterogeneity of Ethylene Terephthalate-Ethylene Oxide Segmented Copolymer with Long Soft Segment

LUO Xiao-Lie, ZHANG Xiao-Yun, WANG Ming-Tai, MA De-Zhu   

  1. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026
  • Received:1996-04-15 Online:1997-05-24 Published:1997-05-24

PDF (PC)

被引次数

9

摘要： 合成了不同软链段长度和不同硬链段含量的系列对苯二甲酸乙二酯－环氧乙烷(PET-PEO)多嵌段共聚物,用NMR质子港测定了硬链段含量,对部分溶于氯仿的PET－PEO多嵌段共聚物进行了分离,并分别测定其氯仿可溶物和不溶物的硬链段含量、熔融热谱和热结晶谱.揭示了PET－PEO多嵌段共聚物的组成不均一性及其对软镇段长度和硬链段含量的依赖性,进而用DSC热谱证明了软链段和硬链段的结晶能力与PET－PEO多嵌段共聚物组成不均一性密切相关.

关键词: 对苯二甲酸乙二酯-环氧乙烷多嵌段共聚物, 组成不均一性, 结晶能力

Abstract: The series of ethylene terephthalate-ethylene oxide segmented copolymers withdifferent long soft segments and different hard segment contents have been synthesized.Thehard segment contents are measured by 1H NMR.Four PET-PEOsegmented copolymerswere separated into soluble and insoluble parts in chloroform.The results have revealed avery evident compositional heterogeneity in these four samples,which depends on the molec-ular weight of soft segment and hard segment content.Simultaneously the melting and ther-mal spectra of the four PET-PEOsegmented copolymers were obtained by DSC.The solubleand insoluble parts have shown the quite different crystallizability both for soft and hard seg-ments, which has the good correspondence with the compositional heterogeneity.

Key words: Ethylene terephthalate-ethylene oxide segmented copolymer, Compositional heterogeneity, Crystallizability

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