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首页> 外文期刊>Journal of Applied Polymer Science >Homopolymerization of 4-Propionoxybenzoic Acid: A Kinetic Study
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Homopolymerization of 4-Propionoxybenzoic Acid: A Kinetic Study

机译：4-丙氧基苯甲酸的均聚：动力学研究

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摘要

A kinetic study of the synthesis of poly (4-oxybenzoate) by melt-step growth polymerization using para-propionoxybenzoic acid is reported. The polycondensations obey second-order kinetics, irrespective of whether the reaction was catalyzed or uncatalyzed. Breaks are observed in the kinetic plots, suggesting the presence of different kinetic regimes during the course of the reaction. An elaborate kinetic model that presupposes precipitation of oligomers predicts two-stage kinetics as well as breaks in the rate plots and fits experimental data well throughout the course of the reaction and the performance of two transesterification catalysts are estimated .No isokinetic tempertature is displayed for the transesterification reaction. Activation energy values for catalyzed reactions are found to be higher than the uncatalyzed reaction, indicating that entropy factors drive the reaction to completion.
机译：报道了使用对丙氧基苯甲酸通过熔融步骤生长聚合合成聚（4-氧苯甲酸酯）的动力学研究。不论反应是催化还是未催化，缩聚反应均遵循二级动力学。在动力学图中观察到断裂，表明在反应过程中存在不同的动力学方案。复杂的动力学模型以低聚物的沉淀为前提，可预测两阶段动力学以及速率图的破裂，并且在整个反应过程中均能很好地拟合实验数据，并且估计了两种酯交换催化剂的性能。酯交换反应。发现催化反应的活化能值高于未催化反应的活化能，表明熵因子驱动反应完成。

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