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范文编号:CL102 范文字数:8195,页数:17 摘 要：本文以十二烷基二甲基苄基溴化铵为阳离子乳化剂、KOH为催化剂、D4为单体进行环硅氧烷阳离子乳液聚合，在此基础上，讨论聚合动力学特征以及聚合过程中单体的扩散规律。研究结果表明：温度升高，聚合速率增加，平衡转化率在86%。阳离子乳化剂及KOH用量增加，聚合反应速率也增加，至一定程度再下降。此外，当聚合开始后，增溶胶束形成的乳胶粒聚合速率快，单体浓度低，单体液滴形成的乳胶粒聚合速率慢，单体浓度高，并随聚合的进行，由于扩散的作用，两者浓度差距变小，直至达到平衡状态，两者达到同样的浓度。 Abstract: This article take the lauryl dimethyl phenmethyl ammonium bromide as the positive ion emulsifier, KOH is the catalyst, D4 is the monomer carries on the link siloxanes positive ion emulsion polymerization, based on this, in discussion kinetics of polymerization characteristic as well as polymerization process monomer proliferation rule. The findings indicated: Temperature increment, the polymerization speed increases, balanced conversion rate in 86%. The positive ion emulsifier and the KOH amount used increases, the polyreaction speed also increases, drops again to the certain extent. In addition, after when gets together starts, increases the emulsoid partical polymerization speed which dissolves micellar forms to be quick, the monomer density is low, the monomer bubble forms the emulsoid partical polymerization speed is slow, the monomer density is high, and along with polymerization advance, because proliferates the function, both density disparity changes is small, until achieves the state of equilibrium, both achieve the similar density.
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