摘要
制备了一系列聚氨酯／环氧树脂互穿聚合物网络ＰＵ／ＥＰＩＰＮｓ。由ＤＳＣ、ＴＭＡ和ＤＤＶ研究表明，ＩＰＮｓ在高温区存在单一的玻璃化转变温度Ｔｇ，ＩＰＮｓ的相行为与其粘接剪切强度相关。
A series of polyurethane/epoxy resin (PU/EP) IPNs based on polymethylene polyphenyl isocyanate (PAPI) and polyether or polyester diols were prepared. The phase behavior and adhesive shear strength were investigated by DSC, TMA, dynamic viscoelastomer and tensile tester. Single glass transition temperature in high temperature regions implies good compatibility between two networks, especially for IPNs composed of novolac epoxy resin. The better the compatibility at the PU/EP=25/75, the larger the adhesive strength up to 16～18 MPa versus 12～13 MPa for epoxy resins. The existance of a graft polymer within the IPNs may be attributed to the improvement in compatibility.
出处
《高分子材料科学与工程》
CSCD
北大核心
1996年第5期122-127,共6页
Polymer Materials Science & Engineering
关键词
聚氨酯
环氧树脂
互穿网络聚合物
相行为
强度
polyurethane/epoxy resin IPNs
phase behavior
adhesive shear strength
