环氧-聚氨酯复合乳液的合成及表征  

Synthesis and Characterization of Epoxy-Polyurethane Resin Hybrid Emulsion

作　　者：邓朝霞[1] 叶代勇[2] 陈焕钦[2] 

机构地区：[1]广东第二师范学院化学系,广州510303 [2]华南理工大学化学与化工学院,广州510640

出　　处：《材料导报》2012年第10期107-109,122,共4页Materials Reports

基　　金：广东第二师范学院博士科研专项经费(10ARF11)

摘　　要：以甲苯二异氰酸酯(TDI-80)、聚醚二醇(N220)、二羟甲基丙酸(DMPA)、环氧树脂为主要原料,合成了环氧-聚氨酯复合乳液。主要讨论了环氧树脂对水性聚氨酯乳液及其涂膜性能的影响。实验结果表明,环氧-聚氨酯乳液的表面张力、粘度,涂膜的硬度、耐水性及力学性能随着环氧树脂用量的增大而增强,但乳液外观和稳定性变差,故适宜的环氧树脂添加量为4%～8%。采用傅里叶变换红外光谱、粒径分析仪、凝胶渗透色谱(GPC)、透射电镜(TEM)对乳液和涂膜进行了表征。傅里叶变换红外光谱分析表明,环氧树脂的环氧基和羟基都参与了反应。粒径分析仪和凝胶渗透色谱分析显示,加入环氧树脂后,水性聚氨酯(WPU)分散体粒径和分子量增大,粒径分布和分子量分布均变宽。The epoxy-polyurethane resin hybrid emulsion was prepared using toluene diisocyanate（TDI-80）, polyether（N220）, dimethylolpropionic acid（DMPA） and epoxy resin as the main raw materials. The influences of epoxy resin on the properties of the water-borne polyurethane emulsion and film were mainly discussed. The experimental results show that the surface tension and the viscosity of PUE emulsion and the hardness, water resistance and mechanical property of PUE film increase with the increasing of the amount of epoxy resin, while the appearance and the stability of PUE emulsion deteriorate. So the suitable amount of epoxy resin is 4%-8%. The emulsion and film was characterized by FT-IR, Malvern particle size analyzer, GPC and TEM. The FTIR found that the epoxy group and hydroxyl group of epoxy resin are all involved in the reaction. The particle size analyzer and the GPC measuring show that the particle size and the molecular weight of WPU increase and the particle size distribution and the molecular weight distribution become wide by adding epoxy resins.

关 键 词：环氧树脂 水性聚氨酯 复合乳液 凝胶渗透色谱 透射电镜 

分 类 号：TQ316.6[化学工程—高聚物工业]