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ժҪ ��ԭλ��Һ�ۺϷ��Ʊ��TiO2 PS(�� ۱��ϩ)��΢��,̽��˸��΢��Ʊ��,��ú��⡢͸��羵�Ͳ��ȷ��ȷ��ֶζ��ṹ��˱��,��ԭλ��Һ�ۺϷ��Ʊ��ֲ��һ�Ĳ�ͬ��TiO2 PS��΢��,��Ӧ��΢��γɼ��Ӱ��ܴ�,��pH>7�Լ��黯��С��ٽ罺��Ũ��γɸ��΢��ı�Ҫ��;��΢��汽��ϩŨ��Ӷ��

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Abstract�� In this paper,the composite microspheres of TiO_2/PS(titania/polystyrene)were prepared by in-situ emulsion polymerization.Their reactive conditions and their structure were explored by infrared spectrum (FTIR),transmission electron microscopy (TEM) and differential thermal analyzer (DTA).The results show that TiO_2/PS mono-dispersed composite microspheres with different diameters can be prepared by in-situ emulsion polymerization.In order to get the composite microspheres,it is necessary that the pH of the medium should be above 7 and the amount of emulsifier should be below the critical micelle concentration (CMC).The size of composite microspheres increases with the increasing of styrene concentration.

Keywords��

Received 2004-09-15; published 2004-09-15

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��,�߽�ƽ,��.ԭλ��Һ�ۺϷ��Ʊ��/�۱��ϩ��΢��[J]. ��ѧ��ҵ�빤��, 2004,21(5): 340-343

LI Li,GAO Jian-ping,XIANG An .Preparation of TiO_2/PS Composite Microspheres by In-Situ Emulsion Polymerization[J]. Chemcial Industry and Engineering, 2004,21(5): 340-343

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