Abstract

The regularities of the controlled synthesis of amphiphilic copolymers of styrene and acrylic acid mediated by dithiobenzoate and trithiocarbonates as reversible addition fragmentation chain transfer agents in a 1,4-dioxane solution are considered. The influence of the general composition and chain microstructure on the dispersion stability and hydrodynamic sizes of polymer particles of copolymers containing from 40 to 90 mol % of acrylic acid units is studied. It is shown that in dilute aqueous media random copolymers are dispersed to individual compacted coils owing to the intrachain hydrophobic association of styrene units. The addition of two poly(acrylic acid) blocks to such a copolymer improves its dispersibility in water, and the attachment of two polystyrene blocks makes it insoluble in water because of the interchain association of polystyrene units. The synthesized copolymers possess surface activity, and when applied to a hydrophilic glass surface, they moderately hydrophobize it. In general, this synthetic approach opens up broad prospects for obtaining a wide range of new polymer macromolecules with different properties from one pair of traditional monomers.

中文翻译：

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所需微结构的丙烯酸和苯乙烯两亲共聚物的合成及其性能

摘要

考虑了在1，4-二恶烷溶液中由二硫代苯甲酸酯和三硫代碳酸酯作为可逆的加成断裂链转移剂介导的苯乙烯和丙烯酸两亲共聚物的受控合成的规则性。研究了总组成和链微结构对丙烯酸单元含量为40至90 mol％的共聚物的聚合物颗粒的分散稳定性和流体力学尺寸的影响。结果表明，在稀水性介质中，由于苯乙烯单元的链内疏水性缔合，无规共聚物分散在各个压实的线圈中。在这种共聚物中添加两种聚丙烯酸嵌段共聚物可改善其在水中的分散性，由于聚苯乙烯单元的链间缔合，两个聚苯乙烯嵌段的结合使其不溶于水。合成的共聚物具有表面活性，当应用于亲水性玻璃表面时，它们会适度地疏水化它。通常，这种合成方法为从一对传统单体中获得具有不同特性的各种新型聚合物大分子开辟了广阔的前景。