不同接枝剂对水性聚氨酯性能的影响  

Effects of different grafting agents on the properties of waterborne polyurethane

作　　者：褚明利[1] 丁晓丹 CHU Mingli;DING Xiaodan(School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China)

机构地区：[1]长春工业大学化学工程学院,吉林长春130012

出　　处：《长春工业大学学报》2020年第5期481-487,共7页Journal of Changchun University of Technology

基　　金：国家自然科学基金资助项目(51273025)。

摘　　要：以异佛尔酮二异氰酸酯(IPDI)和聚四氢呋喃醚二醇(PTMG)为主要反应单体,季戊四醇三丙烯酸酯(PETA)和甲基丙烯酸羟乙酯(HEMA)为接枝剂,巯丙基-三乙氧基硅烷(MPTES)为封端剂,制备了一系列水性聚氨酯乳液(WPUHP)。红外测试证明了WPUHP乳液的成功合成;WPUHP胶膜接触角从77.9°提高到96.4°;吸水率从21.76%下降到16.85%;胶膜的拉伸强度由9.91 MPa提升到19.50 MPa,断裂伸长率由773.79%下降到327.25%。TGA测试结果表明,WPUHP胶膜的热稳定性显著提高。With isophorone diisocyanate(IPDI)and polytetrahydrofuran ether glycol(PTMG)as main reactive monomers,pentaerythritol triacrylate(PETA)and hydroxyethyl methacrylate(HEMA)as grafting agents,mercaptopropylene Base-triethoxysilane(MPTES)as an end-capping agent,a series of water-based polyurethane emulsions(WPUHP)are prepared.FTIR confirmed the successful preparation of WPUHP emulsion.The results show:contact angle of WPUHP films increases from 77.9°to 96.4°,water absorption decreases from 21.76%to 16.85%,tensile strength of the films increases from 9.91 MPa to 19.50 MPa and elongation at break decreases from 773.79%to 327.2%.TGA test indicates that thermal stability of WPUHP films is significantly improved.

关 键 词：水性聚氨酯 封端剂 接枝剂 交联 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]