徐剑锋;曾志远;侯鑫新;

• 1:江西经济管理干部学院飞行技术学院

摘要(Abstract)：

采用水性聚丙烯酸酯(WPA)为核,水性聚氨酯(WPU)预乳液为壳,基于原位聚合法制备具有核壳结构的WPUA复合乳液,探究制备过程的主要影响因素并表征WPUA复合薄膜。结果表明:制备复合乳液的最佳反应时间为3 h,聚氨酯(PU)、丙烯酸(AA)和十二烷基苯磺酸钠(SDBS)的最佳质量分数分别为12%、3%和4%。反应过程中用碳酸氢钠调节pH值为4,反应后用氨水进行调节pH值在7～8之间,可得到稳定性好的WPUA复合乳液。此时聚合物之间相容性较高,又能够有效防止絮凝现象;复合材料伴有蓝光,反应速率稳定。红外测试表明:WPUA出现氨酯键和聚丙烯酸酯(PA)的特征吸收峰,表明已经成功引入PA。改性WPUA涂膜的力学性能和耐水性能显著增强,其抗拉强度和吸水率分别为28.47 MPa和7.62%,较WPU改善49.2%和62%。SEM和TEM测试发现:WPUA涂膜中,线性PU有序化程度受到破坏,聚合反应已经在核壳结构的表面发生,预乳液中WPA和WPU结合,形成稳定的核壳结构。

关键词(KeyWords)： 原位聚合;核壳结构;水性聚氨酯;水性聚丙烯酸酯

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 徐剑锋;曾志远;侯鑫新;

DOI: 10.15925/j.cnki.issn1005-3360.2021.08.006

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