Polymerizable water-insoluble surface-active macromers (SAMs), namely α,ω-divinylpolydimethylsiloxane (DVPDMS), α,ω-dipropylmethacrylatepolydimethylsiloxane (DPMPDMS) and α,ω-pair(vinylbenzyl)polydimethylsiloxane (PVBPDMS), were synthesized and characterized using NMR. The colloidal-chemical properties of the synthesized compounds were studied in comparison with non-polymerizable polydimethylsiloxane. Using DVPDMS, DPMPDMS and PVBPDMS as copolymerizable emulsifiers, polystyrene and poly(methyl methacrylate) suspensions with large particles, narrow particle size distribution and with the absence of the residual surfactant in the waste water were obtained. It is shown that in the presence of DPMPDMS it is possible to obtain polymer suspensions with an average particle diameter of 1.6 μm. The proposed mechanism of the effects of the SAMs on the polymerization is based on the copolymerization with the main monomers in the monomer–polymer particle interphases which results in stabilization of the particle protective layers from early stages of the reaction. © 2021 Society of Chemical Industry

中文翻译：

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在表面活性水不溶性有机硅大分子单体存在下通过多相聚合一步合成具有大的窄尺寸分布颗粒的聚合物分散体

可聚合的水不溶性表面活性大分子单体（SAMs），即α，ω-二乙烯基聚二甲基硅氧烷（DVPDMS），α，ω-甲基丙烯酸二丙酯聚二甲基硅氧烷（DPMPDMS）和α，ω-对(乙烯基苄基)聚二甲基硅氧烷 (PVBPDMS) 合成并使用 NMR 进行表征。与不可聚合的聚二甲基硅氧烷相比，研究了合成化合物的胶体化学性质。以DVPDMS、DPPMDMS和PVBPDMS为共聚乳化剂，得到了颗粒大、粒径分布窄、废水中无表面活性剂残留的聚苯乙烯和聚甲基丙烯酸甲酯悬浮液。结果表明，在 DPMPDMS 的存在下，可以获得平均粒径为 1.6 μm 的聚合物悬浮液。SAMs 对聚合反应的影响机制是基于与单体-聚合物颗粒界面中的主要单体的共聚，这导致了反应早期阶段颗粒保护层的稳定。© 2021 化学工业学会