摘要
采用 I P N 技术,制备了一系列光固化型的聚氨酯( P U)与环氧树脂( E P)的 I P N 树脂,经力学性能测试表明,当 P U/ E P= 70/30 时, I P N 的断裂伸长率达160% ,拉伸强度比纯 P U 提高 210% ,显示出良好的正协同效应。利用红外光谱、光学显微镜、应力~应变、硬度等测试手段对 P U/ E P的互穿网络结构:两组分的相容性、微相分离的形态结构进行了表征。并且探讨了 I P N 的结构与力学性能之间的关系及影响因素。认为: P U/ E P的 I P N 力学性能所显示的正协同效应是两种聚合物网络互穿的结果。
A series of ulteraviolet cured polyetherurethane and epoxy resin interpenetrating polymer networks were prepared. The mechanical properties of these IPN have been shown: maximum values of elongation is 160% at PU/EP ratio 70/30. Tensile strength has improved 210% to PU. Structure, morphology and compatibility of IPN were characterized by techniques of IR, optical microscopy stress strain etc. The relationship between structure and mechanical properties of IPN were discussed.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1999年第5期172-175,共4页
Polymer Materials Science & Engineering
基金
浙江省教委应用基础研究资助
关键词
环氧树脂
IPN
聚氨酯
光固化型
polyetherurethane, epoxy resin, interpenetrating polymer networks