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Citation: TANG Ye-Cang, FU Zhong, LUO Shi-Zhong, SUN Yi-Min. Preparation of Monodispersed PMMA Microspheres by Emulsifier-Free Emulsion Polymerization[J]. Chinese Journal of Applied Chemistry, ;2002, 19(10): 981-984. shu

Preparation of Monodispersed PMMA Microspheres by Emulsifier-Free Emulsion Polymerization

1.
College of Chemistry and Material Science, Anhui Normal University, Wuhu 241000

Corresponding author: SUN Yi-Min,
Received Date: 5 February 2002
Available Online: 10 June 2002
Fund Project: 安徽省教育厅自然科学基金资助项目(2000j1090和2001kj095) (2000j1090和2001kj095)安徽省自然科学基金资助项目(00046509) (00046509)

Monodispersed polymethyl metharylate(PMMA) microspheres were synthesized by emulsifier-free emulsion polymerization under the microwave irradiation. 2,2'-Azobis(2-methylpropionamidine)dihydro chloride(AIBA) and potassium persulphate(KPS) were used as cationic and anionic initiators. The effects of initiator, heating ways and monomer concentration on the particle size, uniformity and polymerization rate were discussed. By using AIBA as an initiator, the diameter of particle obtained was smaller than the corresponding polymer particles initiated by KPS, but the polymerization rate was more rapid to give more particles. Increasing the monomer concentration increased the particle diameter but decreased the conversion rate and the number of particles. In comparison with the conventional heating method, microwave irradiation could shorten the polymerization time and give more particles with smaller particle diameter.
- methylmethyacrylate,
- microwave irradiation,
- emulsion polymerization,
- monodispersed particle
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