Polystyrene latex particles obtained by emulsifier-free emulsion polymerization and their interaction with bentonite

被引：0

作者：

Bujanca I.C. ^{[1
]}

Corobea M.C. ^{[1
]}

Miculescu F. ^{[2
]}

Dimonie M. ^{[1
]}

机构：

[1] National Research and Development Institute for Chemistry and Petrochemistry, ICECHIM, Bucharest

[2] Center for Biomaterials-BIOMAT

来源：

Bujanca, Ioneta Codrina | 1600年 / European Polymer Federation卷 / 11期

关键词：

Anionic initiator (KPS); Cationic initiator (AIBA); Emulsifier-free; emulsion polymerization; Polystyrene;

D O I：

10.1515/epoly.2011.11.1.371

中图分类号：

学科分类号：

摘要：

Polystyrene latex particles were prepared by using an emulsifier-free emulsion polymerization with two ionic initiators: potassium persulfate (KPS) and 2,2'-azobis(2-amidinopropane)dihydrochloride (AIBA). The purpose of this study was to obtain polystyrene latex with a good stability in time, a high surface charge density and a small particle size (between 100 and 1000 nm). We used two distinctive molar concentrations for both initiators: 5.5 mM and 55 mM based on aqueous phase. The analysis showed that in the case of KPS initiator the latexes stability was better. With AIBA as initiator smaller latex particles can be achieved. A high surface charge density was measured for large initiator concentration. We achieved satisfying results with both initiators, the optimal condition of polymerization depending on the subsequent utilization of the latex. The SEM images showed that latexes containing bentonite and latexes with no clay have similar size.

引用

共 18 条

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