短链含氟丙烯酸酯对水性聚氨酯的改性研究  

Study on waterborne polyurethane modified by acrylate based on short chain fluoride

作　　者：周维燕[1] 陈红梅[1] 周涛[1] 梁红文[1] 张爱民[1] 

机构地区：[1]四川大学高分子研究所,高分子材料工程国家重点实验室,四川成都610065

出　　处：《中国胶粘剂》2010年第2期22-26,共5页China Adhesives

基　　金：国家自然科学基金面上项目资助(50873071);国家自然科学基金重点项目资助(50933004)

摘　　要：以甲苯二异氰酸酯(TDI)、聚酯二元醇(PBA)、二羟甲基丙酸(DMPA)和丙烯酸羟乙酯(HEA)等为主要原料,采用内乳化法制备出双键封端的水性聚氨酯(CCWPU);然后以该CCWPU作为甲基丙烯酸三氟乙酯(TFMEA)的大分子乳化剂,并与之发生共聚合反应,得到含氟水性聚氨酯(FPU)乳液。采用红外光谱(FT-IR)法、动态激光光散射(DLLS)法及静态接触角法等测试手段,研究了合成工艺、TFMEA用量等对FPU乳液粒径、耐水性能和接触角等影响。结果表明:当w(引发剂)=0.5%、反应温度为80℃和反应时间为4h时,随着TFMEA用量的增加,FPU胶膜对水的接触角由58°左右增至92.5°,FPU乳液的粒径从53nm增至96nm,FPU的耐水性能明显提高,并且经FPU乳液处理过的棉布具有超疏水性能。With toluene diisocyanate （TDI）, polyester diol （PBA）, dimethylol propionic acid （DMPA） and hydroxyethyl acrylate（HEA） as main raw materials, so a CCWPU（waterborne polyurethane terminated by doublebond） was prepared by inside-emulsification method. Then with CCWPU as macromolecule emulsifier and comonomer of TFMEA （namely fluoride acrylate）, so a FPU （waterborne polyurethane with fluorin element） emulsion was prepared. The influences of synthesizing condition,TFMEA content and other factors on FPU emulsion particle diameter, water resistance and contact angle were investigated by Fourier transform infrared spectroscopy （FT-IR）, dynamic laser light scattering （DLLS）, contact angle and other testing meanses. The results showed that the water resistance of FPU film was obviously improved （namely the contact angle of FPU film to water was increased form 58° about to 92.5°） ,and particle diameter of FPU emulsion was increased form 53 nm to 96 nm with increasing TFMEA contents when reaction temperature and reaction time were 80 ℃ and 4 h respectively,mass fraction of initiator was 0.5%. Therefore ,the cotton treated by FPU emulsion had super water resistance.

关 键 词：水性聚氨酯 含氟丙烯酸酯 共聚 疏水性 

分 类 号：TQ433.432[化学工程]