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Poly(styrene-co-sodium styrene sulphonate)(P(St-NaSS)) latex particles were prepared using the mixture of ethanol and water as continuous phase in the presence of surfactant by dispersion--emulsion combined polymerization.The influence of recipes on polymerization process as well as the content of sulphonate group in the purified products was investigated.Results showed that the copolymerization could be performed smoothly.When the mole ratio of NaSS/St/divinyl benzene(DVB) was 25/75/2 and the weight ratio of ethanol/water was 2/11,the product showed a low weight loss in methanol extraction purification,and the NaSS unit ratio in the purified product reached 20.6 mol%,which was close to its theoretical value of 24.9 mol%.
Poly (styrene-co-sodium styrene sulphonate) (P (St-NaSS)) latex particles were prepared using the mixture of ethanol and water as continuous phase in the presence of surfactant by dispersion - emulsion combined polymerization. The influence of recipes on polymerization process as well as the content of sulphonate group in the purified products was investigated. Results showed that the copolymerization could be performed smoothly. Whilst the mole ratio of NaSS / St / divinyl benzene (DVB) was 25/75/2 and the weight ratio of ethanol / water was 2/11, the product showed a low weight loss in methanol extraction purification, and the NaSS unit ratio in the purified product reached 20.6 mol%, which was close to its theoretical value of 24.9 mol%.