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首页> 外文期刊>Polymer Science, Series B. Chemistry >Kinetic Features of Elementary Events in the Radical Polymerization of Methyl Methacrylate under Conditions of Nitroxide-Mediated Reversible Inhibition
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Kinetic Features of Elementary Events in the Radical Polymerization of Methyl Methacrylate under Conditions of Nitroxide-Mediated Reversible Inhibition

机译：甲基丙烯酸甲酯在氮氧化物介导的可逆抑制条件下基本事件的动力学特征

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摘要

The kinetic features of the elementary events of initiation, reinitiation, and reversible termination in the radical polymerization of methyl methacrylate mediated by piperidine and imidazoline nitroxides are studied. The rate constants of these reactions and the constant of equilibrium between the dormant and growing chains are determined. In all the systems studied, the reinitiation rate constant and the equilibrium constant decrease during polymerization. The activity of imidazoline nitroxides in the termination reaction turns out to be an order of magnitude lower than that of piperidine ones, and the constant of interaction of both types of nitroxides with methyl methacrylate growing radicals is two and a half orders of magnitude lower than that with their low molecular weight counterparts.
机译：研究了由哌啶和咪唑啉氨基氧化哌啶介导的甲基丙烯酸甲基丙烯酸甲基丙烯酸甲基甲基丙烯酸甲酯的基本事件的动力学特征。 确定这些反应的速率常数和休眠和生长链之间的平衡常数。 在研究的所有系统中，在聚合过程中再加率恒定和平衡常数降低。 终止反应中的咪唑啉硝基氧化物的活性为低于哌啶物的数量级，两种类型的硝基氧化物与甲基丙烯酸甲酯生长自由基的相互作用是两个和半数量级 用它们的低分子量对应物。

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