摘要
采用原位乳液聚合法,合成聚氨酯过程中引入了功能性单体烯丙氧基羟丙基磺酸钠(AHPS),制得了稳定的无挥发性有机化合物(VOC)的磺酸基聚氨酯/聚丙烯酸酯(PUAS)复合乳液,采用傅立叶红外光谱(FTIR)和热失重分析(TGA)研究了聚合物的结构和性能,并系统测试了制得的PUAS乳液及其涂膜性能.FTIR结果表明,AHPS和聚氨酯发生了化学反应,TGA测试结果表明,随着丙烯酸酯(PA)含量的提高,胶膜的热稳定性提高.随着PA含量从0增加到40%,胶膜的耐水性、力学性能、耐热性、硬度等都会得到改善,但PA含量过大时,乳液不稳定.在PA含量为30%时,PUAS乳液及其胶膜的性能达到最佳.
The waterborne polyurethane/vinyl monomer prepolymer was prepared and allyloxy hydroxyl propanesulfonic salt（AHPS） were introduced to the waterborne polyurethane system and a stable waterborne polyurethane/polyacylate（PUAS） composite emulsion without any VOC had been obtained by means of emulsion polymerization in situ. The structure and properties of PUAS were characterized by fourier transform infrared spectroscopy（FTIR） and thermogravimetric analysis（TGA ） , and the properties of PUAS emulsion and ilms were tested. FTIR test results showed that AHPS has reacted with polyurethane and polyacrylate. TGA results showed that the thermal stability of PUAS ilms was improved with the increment of the acrylate content. The water resistance, mechanical properties, the thermal stability and hardness of the ilms were improved with the acrylate content increased from 0 to 40%. The PUAS emulsion will be stable while the polyacrylate content is excessive. When acrylate content was 30 % , the performance of PUAS emulsion and its ilms achieved thebest .
出处
《陕西科技大学学报（自然科学版）》
2016年第4期93-98,共6页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(81302706)
陕西省工业科技攻关项目(2016GY-241)
西安市科技计划项目(CXY1527)
