A novel approach to prepare core/shell polymer latex particles with high sulphonate contents |
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Authors: | Ji-shuai Wang Yang Hu Jie Shen Xin-yi Huang Cheng-you Kan |
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Institution: | 1. Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing, 100084, China
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Abstract: | Crosslinked x-P(St-MAA) seed latex was first prepared via soap-free emulsion copolymerization of styrene (St) and methyl methacrylic acid (MAA) with divinyl benzene as crosslinker and ammonium persulfate as initiator, and x-P(St-MAA)/x-P(St-NaSS) core/shell latex particles were then synthesized through a novel seeded emulsion copolymerization of St and sodium styrene sulphonate (NaSS) in the presence of water-soluble crosslinker N,N′-methylene bisacrylamide (BAA) using oil-soluble 2,2-azobis isobutyronitrile as initiator. TEM observation indicated that narrow dispersed core/shell latex particles were obtained, and element analysis showed that NaSS unit content in the whole particle and in the shell reached 22.8 wt% and 51.2 wt%, respectively. |
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Keywords: | Sulphonate-containing particles Seeded emulsion polymerization Morphology Core/shell |
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