KINETIC AND THERMODYNAMIC ASPECTS OF MINIEMULSION COPOLYMERIZATION

被引：22
作者：
DELGADO, J
ELAASSER, MS
机构：
[1] Sensitive Adhesive Technology Center, 3H Center, St. Paul, Minnesota, 55144
[2] Emulsion Polymers Institute, Department of Chemical Engineering, Center for Polymer Science and Engineering, Lehigh University, Bethlehem, Pennsylvania
来源：
MAKROMOLEKULARE CHEMIE-MACROMOLECULAR SYMPOSIA | 1990年 / 31卷
关键词：
D O I：
10.1002/masy.19900310108
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Miniemulsion polymerization involves initiation of polymerization in preformed stable monomer emulsion droplets with average droplet diameter of 50–500 nm. At the end of the polymerization, only a fraction of the initial number of monomer droplets become polymer particles. The emulsifier system used for the preparation of such emulsions comprises a mixture of ionic surfactant and a fatty alcohol or long chain alkane (termed cosurfactant). The cosurfactant is essential for the formation of stable emulsion droplets and in addition it plays an important role in the interparticle monomer transport. Kinetic results are presented on conventional emulsion and miniemulsion copolymerization of different pairs of monomers, showing the main differences for both processes. These differences were related to the particle formation mechanism and the influence of the cosurfactant in the miniemulsion process. A theoretical model was developed, based on mass balances and equilibrium thermodynamics, which was found to describe accurately the experimentally generated data on comonomer distribution during the course of the copolymerization process and the interdroplet mass transport process. Copyright © 1990 Hüthig & Wepf Verlag
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页码：63 / 87
页数：25
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