PEG嵌段热塑性聚氨酯弹性体的形态结构和性能  

EFFECT OF MOLECULAR WEIGHT OF POLYETHELENE GLYCOL ON THE PROPERTIES AND MORPHOLOGY OF EO/THF COPOLYETHER TPU

作　　者：陈福泰[1] 多英全[1] 罗善国[1] 罗运军[1] 谭惠民[1] 

机构地区：[1]北京理工大学化工与材料学院,北京100081

出　　处：《高分子材料科学与工程》2001年第3期54-57,共4页Polymer Materials Science & Engineering

基　　金：国家"8 6 3"计划基金资助课题! (86 3- 715 - 0 11- 0 0 90 )

摘　　要：采用熔融预聚二步法合成了以环氧乙烷 -四氢呋喃无规共聚醚和聚乙二醇混合聚醚为软段 ,异佛尔酮二异氰酸酯和 1,4 -丁二醇为硬段的热塑性聚氨酯弹性体 ,利用 TEM、WAXD、DSC对聚合物进行了表征 ,并测试了其力学性能。结果表明 ,聚合物具有微相分离的特征 ,随着聚乙二醇分子量的增大 ,微相分离程度增加 ,拉伸强度和延伸率也随着增加。当 PEG分子量为 4 0 0 0时 。The properties and morphology of segmented polyether thermoplastic polyurethane elastomers consisting of EO/THF copolyether and polyethelene glycol(PEG) as the soft segments and isophorone diisocyanate extended with 1,4 butanediol as the hard segments were studied by means of tensile testing, TEM, WAXD and DSC. The results show that the TPUs have typical microphase separation which increases with PEG molecular weight increasing, as well as the stress and strain. When PEG with a molecular weight of 4000 is used, the integrative properties of TPU are optimum.

关 键 词：热塑性聚氨酯弹性体 微相分离 PEG 嵌段结构 形态 电子透射显微镜 广角X射线 差示扫描量热法 

分 类 号：TQ334.9[化学工程—橡胶工业]