对苯二甲酸乙二酯-环氧乙烷多嵌段共聚物的结晶行为  

THE CRYSTALLINITY OF ETHYLENE OXIDE-ETHYLENE TEREPHTHALATE SEGMENTED COPOLYMERS

作　　者：张晓云[1] 罗筱烈[2] 马德柱[2] 

机构地区：[1]石油大学化学化工学院,山东东营257061 [2]中国科学技术大学高分子系,安徽合肥230026

出　　处：《高分子材料科学与工程》2003年第4期96-99,共4页Polymer Materials Science & Engineering

摘　　要：用两步法合成了对苯二甲酸乙二酯 -环氧乙烷 (EOET)多嵌段共聚物 ,并研究了软硬链段的结晶特性。 DSC研究表明软链段 PEO分子量不低于 4 0 0 0 ,在室温下方可结晶 ,并且软链段的结晶特性受硬链段含量和硬链段结晶度的影响 ;偏光显微镜观察硬链段易形成微晶 ,在软链段熔融温度以上起到物理交联点的作用。The series of ethylene oxide-ethylene terephthalate segmented copolymers(EOET) with different long soft segments and different hard segment contents were synthesized. The crystallinity and morphology of EOET segmented copolymers were studied by using DSC and polarizing microscopy methods. Only when PEO molecular weight isn′t lower than 4000, are the PEO segments able to crystallize at usual processing conditions. The crystallinity of PEO segments is influenced by hard segments contents and its crystallinity. The formation of hard segment domains is easy in EOET segmented copolymer. The hard segment domains act as physical crosslinks at temperatures above the melting point of the PEO crystals. The structural characteristics of EOET segmented copolymer may exhibit shape memory effect.

关 键 词：对苯二甲酸乙二酯 环氧乙烷 多嵌段共聚物 结晶行为 软链段 硬链段 

分 类 号：O631.13[理学—高分子化学] O633.14[理学—化学]