以聚乙烯醇为保护胶体的乳液与部分官能团的接枝反应研究

Research on the Grafting Reaction between Emulsion and Partial Functional Group with Polyvinyl Alcohol as Protective Colloid

主要研究了在以聚乙烯醇为保护胶体的醋酸乙烯乳液聚合中,乳液与环氧丙烯酸酯、聚氨酯、硅烷等官能团的接枝反应。在以过硫酸铵为引发剂、以聚乙烯醇为保护胶体的醋酸乙烯乳液聚合中,乳液与上述各类官能团间发生的接枝反应直接影响乳液的黏度、固体含量、剪切强度等宏观性质。研究发现官能单体脂肪醇聚氧乙烯醚、丙烯酸异辛酯(2-EHA)等单体和丙烯酸(AA)与乙烯基三乙氧基硅烷共同作用时对乳液的宏观性质影响显著。

The grafting reactions between emulsion and functional groups, such as epoxy acrylate, polyurethane and silane in the process of emulsion polymerization of vinyl acetate （VAc） with poly（ vinyl alcohol） （PVA） as protective colloid are studied. The grafting reactions between emulsion and the functional groups mentioned above have direct＇effects on the properties of emulsion such as viscosity, solid content ,. shear strength and etc in the process of emulsion polymerization of VAc with ammonium persulfate as initiator and PVA as protective colloid. It is discovered that the simultaneous effects of monomers, acrylic acid and vinyltriethoxy silane will have great influences on the macroscopic properties of the emulsion; the monomers include functional monomer poly （ ethylene oxide） alkyl ether, 2 - ethylhexyl acrylate monomer and etc.