Citation: Rong Long LI, Cheng You KAN, Yi DU, Ze Ping LI. Influences of Electrolytes on the Soap-free Emulsion Copolymerization of St-MMA-AA[J]. Chinese Chemical Letters, ;2006, 17(11): 1503-1506. shu

Influences of Electrolytes on the Soap-free Emulsion Copolymerization of St-MMA-AA

Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084

Received Date: 8 September 2006

Fund Project: This work is supported by the Grant from the Doctor Program Foundation of the Ministry of Education of China (No. 20030532003).

Monodisperse functional polymer microspheres with different particle size and with clean surface were prepared by batch soap-free emulsion polymerization of styrene, methyl methacrylate and acrylic acid in the presence of salts, and the influences of type and amount of electrolytes on polymerization process and particle morphology were investigated. Results showed that there was a critical concentration for different electrolyte to make polymerization process and the resultant emulsion stable, and the particle size increased with the increase of electrolyte concentration. The effect of metal ions was Ca²⁺ >> K⁺ > Na⁺ > Li⁺, and the effect of haloids was Br^- > Cl^- > F^-.
- Electrolyte,
- soap-free emulsion polymerization,
- polystyrene,
- latexparticle morphology
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