耐水性聚醋酸乙烯酯乳液的制备和性能研究

摘要

The water resistance of polyvinyl acetate was enhanced by adding butyl acrylate and vinyl versa-tate. The dispersity was tested by SEM. The effect of evocator amount, protective colloid amount and vinyl versatate amount on emulsion and strengths of the films were discussed. The results showed that the best evocator amount is 2%, the dynamic viscosity and water absorption were enhanced with PVA amount increasing. The best temperature is 75℃.%本文以醋酸乙烯酯为主要单体，通过添加丙烯酸丁酯和叔碳酸乙烯酯来对聚醋酸乙烯酯进行改性以提高其耐水性，并通过扫描电镜对乳液的分散性进行了测试。讨论了引发剂用量、保护胶体用量以及叔碳酸乙烯酯用量对乳液及胶膜性能的影响。结果表明：引发剂的最佳用量为2%，体系粘度及吸水率随PVA用量的增加而增大；聚合反应的最佳温度为75℃。