一种涂料用非离子型水性聚氨酯的制备和表征  

Preparation and Characterization of Anon-ionic Waterborne Polyurethane for Coatings

作　　者：夏晓健 万芯媛 陈云翔 韩纪层 林德源 许晖烨 陈天鹏 罗盛相 徐立功[4] XIA Xiao-jian;WAN Xin-yuan;CHEN Yun-xiang;HAN Ji-ceng;LIN De-yuan;XU Hui-ye;CHEN Tian-peng;LUO Sheng-xiang;XU Li-gong(Power Research Institute of State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350003,China;State Grid Fujian Electric Power Co.,Ltd.,Putian Power Supply Company,Putian 351100,China;Fujian Yili Construction Engineering Co.,Ltd.,Fujian Electric Power Debugging Branch,Fuzhou 350016,China;School of Sports Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]国网福建省电力有限公司电力科学研究院,福建福州350003 [2]国网福建省电力有限公司莆田供电公司,福建莆田351100 [3]福建省亿力建设工程有限公司福建电力调试分公司,福建福州350016 [4]华东理工大学体育科学与工程学院,上海200237

出　　处：《化学试剂》2021年第10期1443-1447,共5页Chemical Reagents

摘　　要：采用自制酸酐与聚乙二醇单甲醚(MPEG)连续通过酯化反应、缩酮脱除反应、己内酯开环反应制备了含支链聚乙二醇单甲醚的聚己内酯二元醇(MPCL),通过^(1)HNMR、GPC和XRD对其结构及结晶性进行表征并以其作为软段制备非离子型水性聚氨酯乳液,采用SEM、FTIR和万能试验机对乳液及成膜物进行微观及力学性能表征,制备了综合性能优异的非离子型水性聚氨酯乳液(WPU)。MPCL结构及分子量符合预期,随己内酯聚合度升高,支链聚乙二醇单甲醚的结晶性减弱直至消失,以MPCL为软段的聚氨酯分子链在水相中呈球状,在原料物质的量配比相同的前提下,MPCL分子量越大,成膜物断裂伸长率越高,拉伸强度则越低;以结构清晰的MPCL为软段制备的聚氨酯聚合物完全可分散在水中形成乳液,MPCL的分子量对乳液成膜物的各项性能有明显影响。Prepare the non-ionic waterborne polyurethane emulsion with excellent compressive properties.Anhydride made by lab and mono-methoxy poly ethylene glycol(MPEG)were used to prepare the polycaprolactone diol with branched MPEG according to the esterification,ketal removal and caprolactone ring-opening reaction continuously.The structure and crystallinity of polymer were characterized by^(1)HNMR,GPC and XRD;then the waterborne polyurethane was synthesized by the polymer as soft-segment and the performance before and after film formation was characterized by the SEM,FTIR and universal tester.The structure and molecule weight met the expectation.With the increase of the degree of caprolactone polymerization,the crystallinity of branched-chain PEG monomethyl ether decreased and even disappeared.The PU molecular chain with MPCL as the soft segment can easily dispersed in water phase to form spherical micelles.PU polymer prepared by MPCL with clear structure as soft segment can be completely dispersed in water phase to form emulsion.The molecule weight of MPCL has obvious influence on the properties of the emulsion film.

关 键 词：酯化 缩酮脱除 开环反应 非离子型水性聚氨酯 乳液 

分 类 号：TQ317.4[化学工程—高聚物工业]