水性超支化聚氨酯丙烯酸酯乳液的合成与性能  

Preparation and properties of waterborne hyperbranched polyurethane acrylate emulsion

作　　者：韩浩然 刘欣 许泽军[1,2] 张道洪 HAN Haoran;LIU Xin;XU Zejun;ZHANG Daohong(South-Central Minzu University,College of Chemistry and Materials Science,Wuhan 430074,China;South-Central Minzu University,Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications,Wuhan 430074,China)

机构地区：[1]中南民族大学化学与材料科学学院,武汉430074 [2]中南民族大学超支化聚合物合成与应用技术湖北省工程研究中心,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2024年第3期289-294,共6页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(51873233);中央高校基本科研业务费专项资金资助项目(CZP20006,CZH23005)。

摘　　要：以聚四氢呋喃(PTMG-1000)、异佛尔酮二异氰酸酯(IPDI)、季戊四醇三丙烯酸酯(PETA)和端羟基超支化聚酯(HBP-OH)等为主要原料,制备了水性超支化聚氨酯丙烯酸酯(WHPUA-n)乳液.通过傅里叶变换红外光谱(FT-IR)和核磁共振氢谱(1H NMR)表征了WHPUA-n的化学结构.研究了HBP-OH的分子量对WHPUA-n乳液及固化膜性能的影响.结果表明:HBP-OH能显著提高乳液的稳定性和综合性能,随着HBP-OH分子量的增加,乳液的黏度先降低后增加,乳液固化膜的拉伸韧性、耐磨性、耐水性和耐热性先增加后降低,中等分子量的HBP-OH(H102)制备的乳液的综合性能最好.WHPUA-n乳液稳定性好、粒径均匀,其固化膜光泽度高、硬度高、附着力高和耐水性优异,在水性涂料领域潜力巨大.A waterborne hyperbranched polyurethane acrylate(WHPUA-n)emulsion was synthesized by polytetrahydrofuran glycol(PTMG-1000),isophorone diisocyanate(IPDI),pentaerythritol triacrylate(PETA)and hydroxyl-terminated hyperbranched polyester(HBP-OH).The chemical structures of WHPUA-n were characterized by FT-IR and 1H NMR.The influence of the molecular weight of HBP-OH on the properties of WHPUA-n emulsion and cured films was studied.The results showed that HBP-OH significantly improved the stability and comprehensive properties of emulsion.With the increase in molecular weight of HBP-OH,the viscosity of emulsion first decreased and then increased.The toughness,wear resistance,water resistance and heat resistance of the emulsion cured films first increased and then decreased.The emulsion prepared by medium molecular weight HBP-OH(H102)showed the best comprehensive performance.The WHPUA-n emulsion demonstrated good stability,uniform particle size,good glossiness,high hardness,high adhesion,excellent water resistance and great potential in the field of waterborne coatings.

关 键 词：聚氨酯丙烯酸酯 超支化聚酯 乳液 合成 性能 

分 类 号：O631.5[理学—高分子化学]