PPCD型超支化水性聚氨酯的合成及性能  

Synthesis and Properties of PPCD-type Hyperbranched Waterborne Polyurethanes

作　　者：谢正斌 艾娇艳[1] 袁洁 区炜 刘保华[1] 许一齐 XIE Zhengbin;AI Jiaoyan;YUAN Jie;OU Wei;LIU Baohua;XU Yiqi(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,Guangdong,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《聚氨酯工业》2022年第5期12-15,共4页Polyurethane Industry

基　　金：广东省应用型科技研发专项资金项目(15ZK0498);二氧化碳聚合物应用研究项目(20HK0202)。

摘　　要：采用聚碳酸亚丙酯二醇(PPCD)、异佛尔酮二异氰酸酯(IPDI)、2,2-羟甲基丙酸(DMPA)和1,4-丁二醇合成端NCO基聚氨酯预聚体,再用正丁醇进行部分封端后与由IPDI、DMPA及二乙醇胺(DEOA)合成的超支化多元醇(HP)进行接枝反应,制得PPCD型超支化水性聚氨酯(HWPU)乳液。讨论了HP用量对PPCD型HWPU的化学结构、耐水性、力学性能及热稳定性的影响,并与聚己二酸-1,4-丁二醇酯二醇(PBA)和聚四氢呋喃二醇(PTMG)制备的HWPU进行对比。结果表明,随着HP含量的增加,HWPU膜的拉伸强度增大,断裂伸长率减小,吸水率显著降低,热稳定性提高;与PBA型和PTMG型HWPU相比,PPCD型HWPU具有较高的强度与柔韧性。The NCO-terminated polyurethane prepolymer was synthesized by polypropylene carbonate diol(PPCD),isophorone diisocyanate(IPDI),2,2-hydroxymethylpropionic acid(DMPA),and 1,4-butanediol,then partially capped with n-butanol.The PPCD-type hyperbranched waterborne polyurethane(HWPU)emulsions was prepared with prepolymer and hyperbranched polyol(HP)synthesized from IPDI,DMPA and diethanolamine(DEOA).The effects of HP dosage on the chemical structure,water resistance,mechanical properties and thermal stability of PPCD-HWPU were discussed and compared with those prepared by poly(1,4-butylene adipate)diol(PBA)and polytetrahydrofuran diol(PTMG).The results showed that,with the increase of HP content,the tensile strength of HWPU film increased,the elongation at break decreased,the water absorption decreased significantly,and the thermal stability improved.Compared with PBA-HWPU and PTMG-HWPU,the PPCD-HWPU had higher strength and flexibility.

关 键 词：聚碳酸亚丙酯二醇 超支化聚合物 水性聚氨酯 机械性能 耐水性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]