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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of small-sized carboxylated latexes by emulsion polymerization using alkali-soluble random copolymer
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Preparation of small-sized carboxylated latexes by emulsion polymerization using alkali-soluble random copolymer

机译：碱溶性无规共聚物乳液聚合制备小型羧化胶乳

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摘要

Alkali-soluble random copolymer (ASR), poly(styrene/alpha-methylstyrene/acrylic acid) [M-n: 4,300; acid number: 190], was used as a polymeric emulsifier in the emulsion polymerization of styrene and methyl methacrylate, respectively. ASR containing a large number of carboxyl groups could form aggregates like micelles, and the solubilization ability of the aggregates was dependent on the neutralization degree of ASR. The polystyrene latexes prepared using ASR showed the small particle size (ca. 40 nm) and monodispersed particle size distribution, On the other hand, the particle size distribution of poly( methyl methacrylate) latexes became broader as the neutralization of ASR increased. This could be explained, by the effects of water solubility of the monomer and the neutralization degree of ASR on particle formation. Thin layer chromatography/flame ionization detector analysis confirmed that the grating reaction of polystyrene to ASR occurred during emulsion polymerization. The zeta potentials of final latexes showed high values due to ASR that was adsorbed and grafted on the surface of the latex particle. (C) 1998 John Wiley & Sons, Inc. [References: 17]
机译：碱溶性无规共聚物（ASR），聚（苯乙烯/α-甲基苯乙烯/丙烯酸）[M-n：4,300; m / z]。酸值：190]分别用作苯乙烯和甲基丙烯酸甲酯的乳液聚合中的聚合物乳化剂。含有大量羧基的ASR可以形成胶束状的聚集体，其溶解能力取决于ASR的中和度。使用ASR制备的聚苯乙烯胶乳显示出较小的粒径（约40 nm）和单分散的粒径分布，另一方面，随着ASR的中和作用增加，聚（甲基丙烯酸甲酯）胶乳的粒径分布变得更宽。这可以通过单体的水溶性和ASR的中和度对颗粒形成的影响来解释。薄层色谱/火焰电离检测器分析证实，乳液聚合过程中发生了聚苯乙烯对ASR的光栅反应。由于ASR被吸附并接枝在乳胶颗粒的表面上，因此最终乳胶的ζ电位显示出较高的值。 （C）1998 John Wiley＆Sons，Inc. [参考：17]

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