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In this study,P(St-MAA) seed latex particles were first prepared via soap-free emulsion polymerization of styrene(St) and methacrylic acid(MAA),then the seed particles were allowed to swell with St at room temperature,and the P(St-MAA)/P(StNaSS) core/shell latex particles were then synthesized via seeded emulsion copolymerization of St and sodium styrene sulphonate (NaSS) using AIBN as initiator in the presence of N,N’-methylenebisacrylamide(BAA,water-soluble crosslinker).Results showed that the polymerization could be carried out smoothly when the ratio of BAA to total monomers was less than 3 mol%,the narrow dispersed P(St-MAA) seed particles with the diameter of 150 nm and the P(St-MAA)/P(St-NaSS) core/shell latexes with the particle size of about 200 nm were synthesized.When the 25/75 mole ratio of NaSS/(St + MAA) and 2 mol%of BAA were used in the seeded emulsion polymerization,the resulted P(St-MAA)/P(St-NaSS) latex product showed a low weight loss after water extraction,and the NaSS unit content in the whole particle and in the shell reached 11.7 mol%and 34.6 mol%,respectively.
In this study, P (St-MAA) seed latex particles were first prepared via soap-free emulsion polymerization of styrene (MA), then the seed particles were allowed to swell with St at room temperature, and the P (St-MAA) / P (StNaSS) core / shell latex particles were then synthesized via seeded emulsion copolymerization of St and sodium styrene sulphonate (NaSS) using AIBN as initiator in the presence of N, N’-methylenebisacrylamide -soluble crosslinker). Results showed that the polymerization could be carried out smoothly when the ratio of BAA to total monomers was less than 3 mol%, the narrow dispersed P (St-MAA) seed particles with the diameter of 150 nm and the P (St-MAA) / P (St-NaSS) core / shell latexes with the particle size of about 200 nm were synthesized. WHEN the 25/75 mole ratio of NaSS / (St + MAA) and 2 mol% of BAA were used in the seeded emulsion polymerization, the resulted P (St-MAA) / P (St-NaSS) latex product showed a low weight loss after water extraction, and the N aSS unit content in the whole particle and in the shell reached 11.7 mol% and 34.6 mol%, respectively.