摘要
用溶液聚合法和RIM合成了软段为胺端基聚环氧丙烷,硬段为4,4′-二苯甲烷二异氰○用二乙基甲苯二胺扩链的热塑性嵌段聚脲。用凝胶渗透色谱和应力-应变研究了这些聚合物的性质。和溶液聚合相比,RIM聚脲有显著的低分子量部分,但二者力学性能差别不大。
A series of amine terminated polypropylene oxide based thermoplastics polyurcas with hard segment contents of 30, 50, and 70%were synthesized via solution polymerization and reaction injection molding (RIM) .4,4 -diphenylmethane-diisocyanate ( MDI ) extended with diethyltoluenediamine (DETDA) as the hard segment and amine terminated polypropylene oxide of Mn=2050 was used as the soft segment. Polyureas were characterized by gel permeation chromatography (GPC) and tensil testing.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1990年第6期15-19,共5页
Polymer Materials Science & Engineering
关键词
聚脲
聚氨酯
反应注射成型
RIM
polyurea, polyurethane, reaction injection molding.
