【摘要】 <正> 端羟基液体丁二烯-丙烯腈共聚物(简称丁腈羟,以HTBN表示)通常用甲苯二异氰酸酯作固化剂,N,N′-二羟丙基苯胺为链延伸剂经二步法固化成丁腈羟聚氨酯弹性体。本文报导丁腈羟-甲苯二异氰酸酯预聚体和N,N′-二羟丙基苯胺体系中同化温度对同化反应及固化弹性体性能的影响规律。更多还原

【Abstract】 The polyurethane elastomers from hydroxy-terminated copolymer of butadiene-acrylenitrile(HTBN) were prepared at different curing temperatures. Toluene diisocyanate was used as curing agent and N,N’-bis(2-hydroxypropyl)aniline as chain extender. The results showed that the curing rate depends on the curing temperature and the high the temperature, the fast the rate. The activation energy of reaction was determined as 39 kJ/mol. The crosslinking density of cured elastomer, therefore, the tensile strength and hardness of the elastomer increase with increase of the curing temperature, and its elongation decreases with increasing curing temperature.更多还原