Amphiphilic copolymer molecular brushes of three different types with side chains consisting of alkyl and oligo(ethylene glycol) blocks based on higher alkoxy oligo(ethylene glycol) methacrylates (HAOEGM), methoxy oligo(ethylene glycol) methacrylates (MOEGM) and dodecyl(meth)acrylate have been successfully synthesized via conventional radical polymerization in toluene. In case of the copolymerization of HAOEGM with MOEGM, the monomer reactivity ratios were independent of the structure of higher alkyl groups (C12–C18) and the degree of ethoxylation (n = 6–11) and were equal to 0.76–0.81 and 1.19–1.27, respectively. In case of the copolymerization of HAOEGM or MOEGM with dodecyl methacrylate, the reactivity ratios were even closer to each other (1.00–1.17). Applicability of the reactivity ratios calculated at low conversions for estimating copolymer compositions at high conversions was shown. In all systems, compositionally homogeneous copolymers with a narrow molecular weight distribution were formed. For the HAOEGM (C12, n = 9)—dodecyl acrylate monomer system, the reactivity ratios were 0.88 and 0.25 and the resulting copolymers had high compositional heterogeneity.

中文翻译：

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基于烷氧基低聚（乙二醇）甲基丙烯酸酯和十二烷基（甲基）丙烯酸酯共聚物的分子刷：常规自由基聚合合成的特征

三种不同类型的两亲共聚物分子刷，侧链由烷基和低聚（乙二醇）嵌段组成，基于高级烷氧基低聚（乙二醇）甲基丙烯酸酯（HAOEGM）、甲氧基低聚（乙二醇）甲基丙烯酸酯（MOEGM）和十二烷基（甲基）丙烯酸酯已通过在甲苯中的常规自由基聚合成功合成。在 HAOEGM 与 MOEGM 共聚的情况下，单体反应率与高级烷基（C12-C18）的结构和乙氧基化程度（n = 6-11）无关，分别为 0.76-0.81 和 1.19-分别为 1.27。在 HAOEGM 或 MOEGM 与甲基丙烯酸十二烷基酯共聚的情况下，反应性比彼此更接近 (1.00-1.17)。显示了在低转化率下计算的反应性比率用于估计高转化率下的共聚物组成的适用性。在所有系统中，形成了具有窄分子量分布的组成均匀的共聚物。对于 HAOEGM (C12, n = 9)-丙烯酸十二烷基酯单体体系，反应率分别为 0.88 和 0.25，所得共聚物具有高度的组成异质性。