Suspension Polymerization of Styrene without Extra-Surfactant

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Abstract

Polystyrene particles prepared by suspension polymerization are widely used, however, the size distribution of polystyrene particles synthesized by traditional suspension polymerization is not narrow enough and the yield of the desired particles is low. In order to solve these problems, suspension polymerization without surfactant was used to prepare polystyrene particles. The dispersion system of ammonia persulfate/tricalcium phosphate (APS/TCP) was used as stabilizing agents in the preparation of polystyrene particles with suspension polymerization. The effects of dispersion system of APS/TCP on stability of suspension polymerization and the size distribution of polystyrene particles were discussed. In additional, the dispersion mechanism of APS/TCP system was analyzed. The results show that when the quantity of APS is 0.01% and that of TCP is 1.00% of the total monomer weight, suspension polymerization is stable, polystyrene particles are with good transparency, and the monodispersed polystyrene particles with average diameter of 1.35 mm can be obtained. The particle size and its distribution can be controlled by changing the amount of ammonium persulfate and tricalcium phophate.

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	Articles by authors
	Zhao Ying
	Chen Su
	Xu Yongshen
	Yuan Caideng

Keywords： suspension polymerization； styrene； dispersant； ammonium persulfate； particle size distribution

Received 2013-05-14;

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Zhao Ying, Chen Su, Xu Yongshen, Yuan Caideng.Suspension Polymerization of Styrene without Extra-Surfactant[J] Chemcial Industry and Engineering, 2015,V32(4): 24-29

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