等离子体引发炭黑 接枝聚合的溶剂效应

用等离子体处理炭黑发现，这些等离子体黑颗粒经辉发放电后会产生不同种类的活性种，如高能电子、光子、自由基等，这些活性能引发乙烯基单体进行接枝聚合反应。等离子体炭黑对不同的乙烯基单体具有较强的选择性，当选用不同的溶剂时会产生明显的溶剂效应，产生溶剂效应的原因与等离子体引发聚合的机理有关。等离子体的位阻排斥引发机理会对乙烯基单体的接枝聚合产生较强的选择性。等离子体的溶剂化活性引发机理会对乙烯基单体的接枝聚合产生较强的溶剂效应。当等离子体炭黑与甲基丙烯酸甲脂、甲基丙烯酸丁酯接枝聚合时，溶剂采用二甲基甲酰胺，可得到较高的树枝率。同时讨论了接枝反应的的影响因素。在炭黑颗粒上接枝不同的乙烯基单体会对炭黑体系的分散稳定性产生不同的影响。

SOLVENT EFFECT ON GRAFTING POLYMERIZATION OF ARBON BLACK INITIATED BY PLASMA

By plasma radiation carbon black,CB particles can produce various active species,such as high en- ergy electrons, light, free radicals. These active species can initiate grafting polymerization for vinyl monomer. Plasma CB has high selectivity for vinyl monomer and has the solvent effect in different solvent. The reason of solvent effect and monomer selectivity is associated with mechanism of plasma CB initiated polymerization. Steric-Replusion-Induced initiation mechanism of plasma can produce high monomer se- lectivity for polymerization of vinyl monomer. Solventized active seed mitiation mechanism of plasma can produce very strong solvent effect for polymerization of vinyl monomer. The mechanism of grafting poly- merization by plasma was simply described in this paper. Grafting polymerization of CB in the presence of vinyl monomer were investigated. Effects of experimental factors on grafting reaction and CB dispersion of system were discussed.