核壳结构硅橡胶粒子制备+文献综述
关键词 硅橡胶 核/壳结构 接枝共聚物 热性能 反应动力学 稳定性
Title Study on preparation of core-shell silicone rubber particles
Abstract
In this study, the core-shell silicone rubber particles were synthesized by
seeding emulsion polymerization method. The monomer conversion rate was
measured during the preparation of PSi seed emulsion by the gravimetric method.
The influence of concentration of H2SO4 and concentration of emulsifier (SDBS),
reaction temperature on the kinetics of reaction were investigated. The
results showed that the finally monomer conversion and the rate of the
copolymerization was promoted when the reaction temperature raised and the
concentration of catalyst or emulsifier increased. The apparent reaction order
for sulfuric acid and emulsifier was 0.54 and 0.49 respectively. The total
activation energy of the copolymerization was 39.5164 KJ/mol.
After the preparation of PSi seed emulsion, the subsequent polymerization
using BMA as the monomer. Under the suitable polymerization conditions, the
PSi seed emulsion was copolymerized with BMA to form the graft copolymer. We
got the PSi/PBMA core-shell particles by demulsifying, filtering and drying
the PSi/PBMA composite emulsion. The stability of the PSi/PBMA emulsion was
investigated. The structure and performance of core-shell silicone rubber was
confirmed by FT-IR,TEM and thermo gravimetric analysis (TGA).
Keywords silicon rubber core-shell structure graft copolymers thermal
properties reaction kinetics stabilization
目 次
1 绪论 ... 1
1.1 硅橡胶简介及发展现状 . 1
1.2 核/壳结构硅橡胶粒子的发展及现状 .. 2
1.3 核/壳结构硅橡胶的制备 4
1.4 课题研究的主要内容 .. 10
1.5 课题研究的意义 .. 11
2 有机硅乳液聚合动力学研究 .. 11
2.1 前言 11
2.2 实验部分 11
2.3 实验结果与讨论 .. 14
2.4 本章小结 24
3 核/壳硅橡胶粒子的制备及表征 ... 24
3.1 前言 24
3.2 实验部分 25
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