三软段聚氨酯弹性体的制备和力学性能研究  

Preparation and Property of Three-soft-segment PU Elastomer

作　　者：钟发春[1] 贺江平[1] 尚蕾[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《塑料工业》2006年第B05期243-246,共4页China Plastics Industry

摘　　要：采用半预聚体方法制备了系列由聚酯、聚醚二元醇及端羟基聚丁二烯为软段、液化MDI为硬段的三软段聚氨酯弹性体;研究了三软段聚氨酯弹性体的化学结构、力学性能及动态力学性能。结果表明,选择适当的软段组分和制备条件,通过半预聚体方式制备三软段聚氨酯弹性体是可行的。所有聚氨酯弹性体中MDI和软段羟基和交联剂羟基的反应较彻底,三软段可明显拓宽聚氨酯弹性体的玻璃化区域到150℃和有效阻尼温度范围(-30-30℃)。A series of three-sofi-segment PU elastomers was prepared with poly （tetramethylene glycol）（PTMG）, poly （ethylene glycol adipate） （PEA） and hydroxyl-terminated polybutadiene （HTPB） as soft segments, liquid 4,4＇- methylenediphenylene diisocyanate （MDI） as rigid segment by semi-prepolymer method. The chemical structure, mechanical and dynamic mechanical properties of the elastomers were analyzed and determined. The results showed that PU elastomers with broad glass transition temperature and damping temperature could be prepared with three soft segments by semi-prepolymer method at appropriate conditions. The NCO and OH in the PU elastomers reacted quite completely. Three-soft-segment in polyurethanes could broaden the glass transition temperature and damping temperature to 150℃ and 60℃ （from -30℃ to ＋ 30℃ ） respectively.

关 键 词：聚酯 聚醚二元醇 端羟基聚丁二烯 液化MDI 聚氨酯弹性体 力学性能 

分 类 号：TQ334[化学工程—橡胶工业]