文献类型：期刊文献

中文题名：催化剂对异佛尔酮二异氰酸酯制备的脂肪族聚氨酯弹性体结构和性能的影响

英文题名：Effect of Catalyst on Structure and Properties of Aliphatic Polyurethane Elastomers Based on IPDI

作者：张立伟[1];王贵友[1];胡春圃[1];张杰[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2011

卷号：27

期号：7

起止页码：50

中文期刊名：高分子材料科学与工程

外文期刊名：Polymer Materials Science & Engineering

收录：CSTPCD;;EI(收录号：20113914370602);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家科技部项目(2009GJC00035)资助

语种：中文

中文关键词：催化剂;脂肪族聚氨酯弹性体;形态;氢键;力学性能

外文关键词：catalyst； aliphatic polyurethane elastomer； morphology； hydrogen bonding； mechanical property

摘要：采用一步法通过异佛尔酮二异氰酸酯与聚丙二醇和1,4-丁二醇反应合成了脂肪族聚氨酯(PU)弹性体。考察了催化剂的种类和含量对PU弹性体结构和性能的影响。结果表明,以辛酸亚锡为催化剂时,PU弹性体的软段相和硬段相间的相分离程度最明显且分子量最低,导致其力学性能最差;以辛酸铋为催化剂时,PU弹性体软段相和硬段相的相容性较好且分子量最高,其力学性能最好。随着辛酸亚锡含量的增加,PU弹性体软段相和硬段相间的相容性变好且分子量增大,PU弹性体力学性能提高。
A series of aliphatic polyurethane（PU） elastomers based on isophorone diisocyanate were prepared with different catalysts.For the PU elastomer prepared with stannous octoate as catalyst,the degree of separation between soft and hard domains in the PU was obvious,and the mechanical properties were poor.The degree of separation between soft and hard segments in the PU elastomer is decreased when bismuth octoate is used as catalyst,and the tensile strength and break elongation of the PU elastomers increase appreciably.The compatibility between soft and hard domains in the PU increases appreciably with the increase of stannous octoate content when the PU elastomers are prepared,which leads to the remarkably increase of mechanical properties of PU.