Preparation and Colloidal Stability of Phosphonium Latexes by Two Stage Shot-growth Polymerization

KAWASHIMA Yuka, WADA Risei, SHIMIZU Hidenobu, OKABE Masaru

doi:10.1295/koron.65.242

Bibliographic Information

Other Title

２　段階ソープフリー乳化重合によるホスホニウム化ポリスチレン粒子の作製と分散安定性

Abstract

Cationic phosphonium-containing particles were prepared by two stage soap-free emulsion copolymerization of styrene with tributyl-4-vinylbenzyl phosphonium chloride (VBPC). The effect of interfacial structure on colloidal stability was investigated. Different shell structures were constructed by varying the conversion at which the shot addition of VBPC was performed. The amounts of phosphonium groups introduced onto the particles were almost constant regardless of the shot conversion. Particle size analysis by transmission electron microscopy showed that the final size of shot latexes was about 180 nm when VBPC was added at a conversion of above 80%. The colloidal stability of various phosphonium latexes was evaluated by measuring the absorbance as a function of time for different KCl concentrations. Adding VBPC at higher conversion (>90%) caused a significant decrease in the critical flocculation concentration of the corresponding latexes compared to that of the latexes when VBPC was injected at between 80 and 90% conversion, although these particles had nearly the same particle size and nearly the same amounts of phosphonium groups. These results may reflect differences in the shell structure.<br>

Journal

KOBUNSHI RONBUNSHU

KOBUNSHI RONBUNSHU 65 (3), 242-247, 2008

The Society of Polymer Science, Japan

Keywords

Details 詳細情報について

CRID: 1390001206521608704

NII Article ID: 130004489161

DOI: 10.1295/koron.65.242

ISSN: 18815685; 03862186

Text Lang: ja

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JaLC
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Abstract License Flag: Disallowed

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