聚醚型聚氨酯弹性体玻璃化温度的影响因素  

Factors influencing the glass transition temperature of polyether polyurethane elastomer

作　　者：刘晓文 化雪晴 刘锦春[1] LIU Xiao-wen;HUA Xue-qing;LIU Jin-chun(Key Laboratory of Rubber-Plastic, Ministry of Education Qingdao University of Science ＆ Technology, Qingdao 266042, Chin)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室

出　　处：《热固性树脂》2018年第3期22-25,共4页Thermosetting Resin

基　　金：青岛科技大学绿色轮胎与橡胶协同创新中心资助项目(2015GTR0005)资助

摘　　要：选用二苯基甲烷二异氰酸酯体系,采用半预聚法合成了聚醚型聚氨酯弹性体,通过示差扫描量热分析研究了A、B组分中不同多元醇组合、扩链剂组合及扩链系数对弹性体玻璃化转变温度（Tg）的影响。结果表明,随着B组分中多元醇330 N含量增加,弹性体的Tg下降,耐低温性变好。A组分中的多元醇PTMG1000含量高时,弹性体的Tg较高,耐低温性较差。扩链剂1,4-丁二醇/三羟甲基丙烷的质量比为6/1时,材料的Tg最低,耐低温性较好。扩链系数为0.91时,材料的Tg最低,耐低温性最好。The polyether polyurethane elastomer was synthesized by semi-prepolymerization using the diphenylmethane diisocyanate system. The effects of different polyol combinations in component A and component B, chain extender combinations and chain extension coefficients on glass transition temperature（Tg） of elastomers were investigated by DSC.The results showed that with the increasing of 330 N content in the component B,the Tgof the elastomer was decreased and the low temperature resistance became better. When the content of the polyol PTMG1000 in the component A was high,the Tg of the elastomer was high and the low-temperature resistance was poor. When the mass ratio of chain extender 1,4-butanediol/trimethylolpropane was 6/1,the Tgof the material was the lowest,and the low temperature resistance was better. When the chain expansion coefficient was 0. 91,the material had the lowest Tgand the best low temperature resistance.

关 键 词：聚醚多元醇 聚氨酯弹性体 玻璃化转变温度 多元醇 扩链剂 扩链系数 耐低温性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]