摘要
采用不同种类的聚醚多元醇、二异氰酸酯和扩链剂为原料合成聚氨酯,讨论了聚醚多元醇的相对分子质量、二异氰酸酯的结构、软硬段比例、二异氰酸酯指数、扩链剂种类及用量对聚氨酯性能的影响。结果表明：采用高相对分子质量的聚醚,聚氨酯的定伸强度、拉伸强度和撕裂强度下降,断裂伸长率提高;聚氨酯的性能随硬段含量的增加而提高;异氰酸酯指数控制在1.01~1.03左右;扩链剂链长越短,聚氨酯的微相分离程度和力学性能越好;聚氨酯性能随1、4-丁二醇用量的增加而提高,达到一定用量时反而下降。
Polyurethane（PU） based on all kinds of polyether-polygol,diisocyanate and chain-extender was prepared;the different influential factors of PU were discussed.The results showed that when the molecular weight of polyether-polygol increased,the hardness,tensile strength and tear resistance decreased but the elongation at break increased;the property of PU increased with the increasing perecentage of hard segment phase;R numerical value was controlled between 1.01 and 1.03;the shorter chain-extender had excellent micro phase separate and mechanical properties.With the amount of BDO incrasing,the performance of PU becomes well,but when the amount of BDO comes to a point it appears reverse.
出处
《弹性体》
CAS
北大核心
2011年第2期44-47,共4页
China Elastomerics
基金
洛阳理工学院科研项目(2007R201)
关键词
聚醚
聚氨酯
性能
polyether-polyol
polyurethane
properties
