Abstract

The laws of dispersion polymerization of n-butyl acrylate in an aqueous-alcoholic medium in the presence of a hydrophilic reversible addition-fragmentation chain-transfer poly(acrylic acid)-based polymeric agent with a trithiocarbonate group within the chain are investigated. It is shown that the portioned introduction of the monomer into the synthesis makes it possible to achieve higher maximum conversions. The resulting block copolymers are characterized by a relatively narrow molecular weight distribution and their number-average molecular weight increases linearly with increasing monomer concentration. The obtained dispersions of triblock copolymer poly(acrylic acid)–block-poly(n-butyl acrylate)–block-poly(acrylic acid) have a unimodal particle size distribution that persists after dialysis against water. It is shown that the synthesized dispersions may be used as a polymer matrix for immobilizing zinc oxide nanoparticles and as a polymer precursor in the process of the seeded polymerization of styrene.

中文翻译：

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在水-醇介质中可逆链转移条件下丙烯酸和丙烯酸正丁酯嵌段共聚物的合成

摘要

研究了在链内具有三硫代碳酸酯基团的亲水性可逆加成-断裂链转移型聚丙烯酸丙烯酸类聚合剂的存在下，丙烯酸正丁酯在水性醇介质中的分散聚合规律。已表明，将单体分批引入合成中可以实现更高的最大转化率。所得的嵌段共聚物的特征在于相对窄的分子量分布，并且它们的数均分子量随着单体浓度的增加线性增加。将所得到的三嵌段共聚物的聚（丙烯酸）中的分散体-嵌段-聚（正-丙烯酸丁酯） -嵌段-聚（丙烯酸）具有单峰粒径分布，在用水透析后仍然存在。结果表明，所合成的分散体可以用作固定氧化锌纳米粒子的聚合物基质，也可以用作苯乙烯的种子聚合过程中的聚合物前体。