离子型表面活性单体存在下的MMA/BA乳液聚合(Ⅰ)——表面活性单体的合成及其(共)聚合活性

Emulsion Polymerization of MMA/BA in the Presence of Ionic Surface Active Monomers(Ⅰ)——Syntheses and Polymerization Reactivities of the Surfmers

合成了两种离子型表面活性单体 (Surfmer)磺化 -十二醇 -烯丙基甘油 -丁二酸酯钠盐(ZC- L)和磺化 -十二醇 -甲基丙烯酰甘油 -丁二酸酯钠盐 (ZD- L) .着重研究了 ZC- L的结构、表面张力行为、均聚及共聚能力 .实验结果表明 ,不同 Surfmer用量以及不同固含量下 ,MMA/ BA/Surfmer,MMA/ Surfmer及 BA/ Surfmer共聚乳液的表面张力较高 ,说明 Surfmer已通过共聚结合在乳胶粒上 ,乳液中残留甚少 .对 MMA/ BA体系 ,ZC- L的共聚性能比 ZD-

Two surface active ionic monomers(surfmers)[sodium sulfonated lauryl(allyl glyceryl) succinate(ZC L) and sodium sulfonated lauryl(methacryloyl glyceryl) succinate(ZD L)] were synthesized and used in the emulsion copolymerization of methyl methacrylate(MMA) and butyl acrylate(BA). The investigation was emphasized particularly on ZC L for its molecular structure, surface tension behavior and the reactivity for homo and copolymerization. The surface tensions of MMA/BA/Surfmer, MMA/Surfmer and BA/Surfmer copolymer latexes were remarkably higher than that of MMA/BA/sodium dodecyl benzene sulfonate copolymer latex, while similar to or higher than that of MMA/BA emulsifier free copolymer latex, indicating that the surfmers were covalently bonded on polymer latex particles, and there is only a little remained in the aqueous solution. The ZC L copolymerization reactivity with MMA/BA is better than that of ZD L.