Uniform Polystyrene Particles by Dispersion Polymerization in Different Dispersion Medium |
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Authors: | Xin Zhang Shaohua Shen Liyuan Fan |
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Affiliation: | (1) Institute of Chemistry and Chemical Engineering, Hunan University of Science and Technology, 410027 Xiangtan, China |
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Abstract: | Using PVP K-30 as steric stabilizer and AIBN as initiator, uniform polystyrene (PS) particles were
prepared by dispersion polymerization of styrene in ethanol/water and isopropanol/ water media. The effects
of initiator and stabilizer concentration, alcohol/water volume ratio on the average sizes and size range
of PS particles were investigated. Unifrom PS particles in the size range of 0.7-1.7 μm were obtained.
The results showed that higher stabilizer concentration led to PS particles with smaller average sizes,
and higher initiator concentration caused greater average particle sizes. It was also found that the
average sizes reduced and size ranges became narrow as the polarity (solubility parameter) of dispersion
medium employed was increased. |
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Keywords: | |
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