POLYMERIC SURFACTANTS IN EMULSION POLYMERIZATION

被引：17

作者：

PIIRMA, I

机构：

[1] Department of Polymer Science, The University of Akron, Akron, Ohio

来源：

MAKROMOLEKULARE CHEMIE-MACROMOLECULAR SYMPOSIA | 1990年 / 35-6卷

关键词：

D O I：

10.1002/masy.19900350128

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The stabilizing efficiency of a variety of amphipathic copolymers was studied in aqueous emulsion polymerizations of styrene, methyl methacrylate and acrylonitrile. Using the number, and size of the particles as the criterion of stability, it was found that the availability for anchoring of the backbone in the amphipathic graft copolymers was crucial for stability. Within a system, a change in the backbone chain length with the same percent hydrophilic grafts had no effect on the outcome of the reaction: the latices stabilized to the same number of particles of the same size. The results with the polystyrene‐block‐poly(ethylene oxide) copolymers as stabilizers in styrene polymerization gave indication that for efficient anchoring the block length need not be more than 10 monomeric units, and that a poly(ethylene oxide) (PEO) with weight‐average molecular weight Mw = 3000 is just as effective stabilizer as is a block with PEO of Mn = 9000. Copyright © 1990 Hüthig & Wepf Verlag

引用

页码：467 / 475

页数：9

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