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.
出处
《塑料工业》
CAS
CSCD
北大核心
2006年第B05期243-246,共4页
China Plastics Industry
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
Polyester
Poly （ethylene glycol adipate）
Hydroxyl-terminated Polybutadiene
Liquid-MDI
PU Elastomer
Mechanical Properties
