摘要
以硅氧烷、丙烯酸乙酯为原料，经乳液聚合制备了有机硅－丙烯酸酯共聚物。实验证明，在以丙烯酸乙酯为主的体系中，加入不大于３０％（质量）的硅氧烷进行乳液共聚合，不影响聚合反应的正常进行；当乳化剂浓度（［Ｅ］）为（２．０１～１０．０９）×１０￣（－２）ｍｏｌ／Ｌ，引发剂浓度（［Ｉ］）为（０．８６～５．２６）×１０￣（－３）ｍｏｌ／Ｌ时，本体系聚合动力学关系式为Ｒ∝_（ｘ）［Ｅ］￣（０．６）［Ｉ］￣（０．５）；共聚胶乳粒子的粒径及其分布，极大地受到聚硅氧烷助乳化作用的影响，其平均粒径为０．０４８４μｍ，明显小于聚丙烯酸酯的粒径。
The silicone-acrylate copolymer was synthesized using siloxane and ethyl acrylate by emulsion polymerization.The results showed that adding siloxane less than 30% to the system in which ethyl acrylate was main did not influence the normal course of polymerization.When the emulsifier concentration[E] was (2.01～10.09)×10-2mol/L and the initiator concentration [I] was (0.86～5.26)×10-3mol/L,the kinetic relation of the system was R[E]0.6[I]0.5. The action of polysiloxane cosurfactant had great influence on the latex partical size and its distribution of the copolymer. It's average partical size was 0.0484μm which was obviously less than that of pure acrylate polymer.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1994年第4期224-227,共4页
China Synthetic Rubber Industry
关键词
硅氧烷
丙烯酸乙酯
乳液聚合
siloxane
ethyl acrylate
emulsion polymerization
polymerization kinetics
partical size
