超支化水性聚氨酯的合成与表征  

Synthesis and Characterization of Hyperbranched Waterborne Polyurethane

作　　者：姚畅[1] 曾少敏[1] 陈爱芳[1] 易昌凤[1,2] 徐祖顺[1,2] 

机构地区：[1]湖北大学材料科学与工程学院 [2]湖北大学有机功能分子与应用教育部重点实验室,湖北武汉430062

出　　处：《高分子材料科学与工程》2009年第6期35-38,共4页Polymer Materials Science & Engineering

基　　金：湖北省科技厅创新团队基金资助

摘　　要：以甲苯-2,4-二异氰酸酯(TDI)、聚碳酸酯二醇(PCDL)、二羟甲基丙酸(DMPA)和二乙醇胺(DEOA)为原料合成了一种具有超支化结构的水性聚氨酯,产物具有良好的水溶性。通过红外光谱(FT-IR)和核磁共振(13C-NMR)对产物结构的表征,证实了产物具有超支化结构,其支化度为0.32。用高效液相色谱质谱联用仪(LC-MC)对产物的分子量进行测定,其重均分子量为1.66×104。采用电子拉力机和热失重分析仪(TG)对产物的性能进行测试,结果表明,所制备的水性超支化聚氨酯具有良好的力学性能和热稳定性,并且涂膜具有较好的耐水性。Hyperbranehed waterborne polyurethane was prepared from 2, 4-toluylene diisocyanate （TDI）, dimethylol propionic acid （DMPA）, polycarbonatediol （PCDL） and diethanol a mine （DEOA） via A2 ＋ bB2 method. A stable aqueous polyurethane dispersion was obtained when the content of DMPA was 2.0 %. The structures of the result polymer were characterized by FT-IR and ^13C-NMR; the properties of cast film were measured by TGA, tensile tests and water resistance tests. The result shows that the degree of the branching （DB） of the polymer is 0.32. The degradation temperature of the resulting product is 195 ℃. The cast film exhibits good water resistance and tensile strength, the tensile strength of the is 28.4 MPa and the elongation is 359.1% at the break point.

关 键 词：超支化 水性聚氨酯 合成 表征 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]