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Citation: PENG Hui, YANG Ting-Ting, LIAO Qi-Jin, CHENG Shi-Yuan, IN JUN Park. Soap-free Emulsion Copolymerization of Perfluoroalkyl Acrylate In the Presence of Ionic Comonomers[J]. Chinese Journal of Applied Chemistry, ;2005, 22(2): 188-194. shu

Soap-free Emulsion Copolymerization of Perfluoroalkyl Acrylate In the Presence of Ionic Comonomers

1.
a College of Chemistry and Materials Science, Hubei University, Wuhan 430062;
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b Department of Chemical Engineering, Korea Research Institute of Chemical Technology, Taejon, South Korea

Corresponding author: CHENG Shi-Yuan,
Received Date: 29 March 2004
Available Online: 22 July 2004
Fund Project: 中韩政府间合作项目(国科交字[2001]193) (国科交字[2001]193)

The soap-free emulsion copolymerization of perfluoroalkyl acrylate(FA), methyl methacrylate(MMA) and n-butyl acrylate(n-BA) was carried out in the presence of sodium 2-acrylamide-2-methyl propanesulfonate(AMPSNa) as an ionic comonomer and potassium persulfate(KPS) as the initiator. The effects of reaction temperature and the concentrations of AMPSNa, KPS and FA on the kinetics of copolymerization, particle size and dispersive index(PDI), particle number per micro liter water(N_p) were investigated, the electrolyte stability and centrifugation stability of the emulsions were characterized as well. The aqueous dynamic contact angle and water resistance of FA copolymers were determined. The results show that the diameter of latex particles decreases initially and then increases with increase of AMPSNa and KPS concentrations. The polymerization rate indicates the same trend, while the particle diameter increases gradually with increasing fluorinated monomer amount and temperature. Compared with the copolymers prepared by conventional emulsion polymerization, the aqueous dynamic contact angle as well as water resistance of these copolymers were greatly improved.
- perfluoroalkyl acrylate,
- soap-free emulsion,
- ionic comonomer
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