A comparison of emulsion and microemulsion copolymerization of styrene and acrylonitrile

被引：11
|
作者：
Mendizabal, E
RodriguezRuvalcaba, R
Rabelero, V
Puig, JE
Velaquez, R
Castano, V
机构：
[1] UNIV GUADALAJARA,DEPT INGN QUIM,GUADALAJARA 44430,JALISCO,MEXICO
[2] UNIV NACL AUTONOMA MEXICO,INST FIS,MEXICO CITY 01000,DF,MEXICO
来源：
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS | 1995年 / 30卷 / 3-4期
关键词：
D O I：
10.1080/00914039508028595
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 synthesis of styrene-acrylonitrile (SAN) copolymers by emulsion or microemulsion polymerization using either a water-soluble (potassium persulfate or KPS) or a water-insoluble (AIBN) initiator is presented here. The surfactant used was dodecyltrimethylammonium bromide (DTAB) or sodium dodecylbenzenesulfonate (SDBS). Polymerization in DTAB microemulsions initiated with AIBN are faster and have higher conversions than those initiated with KPS, but the opposite effect is observed for emulsion polymerization. In both emulsion and microemulsion polymerizations, high molecular weights (2-4 x 10(6) Dalton) SAN copolymers are produced with composition richer in styrene (S/AN = 81/19 w/w) than the initial feed composition (75/25 w/w). Latex produced by microemulsion polymerization contain particles two- to three-fold smaller than those prepared by emulsion polymerization.
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页码：167 / 179
页数：13
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