摘要：

以自制的亲水性聚氨酯丙烯酸酯(PUA)预聚体为高分子乳化剂，与自制的环氧丙烯酸酯(EA)树脂充分混合后，采用相反转乳化法制备了可UV固化的具有不规则核壳结构的PUA/EA复合乳液。利用傅里叶变换红外光谱对水性PUA合成过程以及复合乳液UV固化前后进行了表征，表明合成得到了目标产物且UV固化良好。透射电镜(TEM)测试表明，复合乳液呈不规则的核壳结构，且EA含量不同时核壳结构也不同。重点讨论了羧基含量对乳液相反转过程、PUA预聚体的乳化能力、复合乳液以及固化后涂膜性能的影响，结果表明，相反转过程中体系黏度与电导率有类似的变化趋势，最大值均随羧基含量的增加而增加，且出现得越来越晚；PUA预聚体的乳化能力随羧基含量的增加而增加，但超过2.3%后变化不再明显；此外，随羧基含量的增加，乳液的平均粒径变小、外观越来越透明、黏度变大、贮存稳定性变好，而

关键词: 聚氨酯丙烯酸酯, 环氧丙烯酸酯, 不规则核壳结构, 复合乳液

Abstract:

Waterborne UV curable polyurethane acrylate (PUA)/epoxy acrylate (EA）hybrid emulsion with anomalistic core-shell structure was prepared from waterborne PUA which was used as emulsor and EA resin by the method of phase inversion.FTIR was used to monitor the structure of PUA resin during its synthesis process and the hybrid emulsion before and after UV curing.The test results by transmission electron microscopy (TEM）showed that the particles of emulsion had an anomalous core-shell shape structure, and the particles exhibited different structures with different EA contents.The effects of —COOH content on the system during the process of phase inversion, the emulsification ability of PUA prepolymer, the abilities of the emulsions and its films were investigated.It was shown that the viscosity and electrical conductivity of the system had similar changing trend of change.The biggest value of them both increased and appeared later when —COOH content increased.The emulsification ability of PUA prepolymer also increased with increasing —COOH content.When the content was more than 2.3%, however, the emulsification ability changed little.Furthermore, the higher the —COOH content was, the smaller the particle size of emulsions, the more transparent the appearance, the bigger the viscosity of system, the better the stability of emulsions, and the higher the hardness of UV cured films.The hygroscopic coefficient of UV cured film increased, then decreased and again increased with increasing —COOH聚氨酯丙烯酸酯, 环氧丙烯酸酯, 不规则核壳结构, 复合乳液