Abstract

The homophase polymerization of acrylic acid is carried out in a solution of poly(butyl acrylate) trithiocarbonate (PBATC) in a mixed solvent 2-propanol–water. The phase diagram of the three-component PBATC-2-propanol–water system at 22°C is obtained. The homophase region of the compositions of semidilute solutions is determined. The homophase polymerization of AA in the three-component system at 70°C, in which the mixed solvent with respect to PBATC is similar in thermodynamic quality to the θ-solvent at 22°, yields solutions of the narrowly dispersed block copolymer butyl acrylate–acrylic acid. The content of the block copolymer in solutions is 15–23%, the MW of the copolymer is 10–20 × 10³, and the polydispersity coefficient is 1.12–1.16. As evidenced by dynamic light scattering, under normal conditions, the solutions contain nanoparticles with a diameter of up to 50 nm with a narrow size distribution.

中文翻译：

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在冷却过程中获得胶体特性的溶液中丙烯酸丁酯和丙烯酸的窄分散嵌段共聚物的合成

摘要

丙烯酸的均相聚合是在聚（丙烯酸丁酯）三硫代碳酸酯（PBATC）在2-丙醇-水混合溶剂中的溶液中进行的。获得了22°C下三组分PBATC-2-丙醇-水系统的相图。确定半稀释溶液的组成的同相区域。三组分体系在70°C时AA的均相聚合，其中混合溶剂相对于PBATC的热力学性质与θ-溶剂在22°C时相似，产生了窄分散的嵌段共聚物丙烯酸丁酯溶液–丙烯酸。溶液中嵌段共聚物的含量为15–23％，共聚物的MW为10–20×10 ³，多分散系数为1.12–1.16。如动态光散射所证明的，在正常条件下，溶液包含直径最大为50 nm且粒径分布窄的纳米颗粒。