聚对苯二甲酸丙二醇酯的甲醇解聚研究

在高压反应器中研究了聚对苯二甲酸丙二醇酯的甲醇解聚反应规律，考察了反应温度、时间等对解聚反应的影响。结果表明，单体收率随反应温度的升高、反应时间的延长而增加；利用凝胶色谱分析了反应后固体产物的组成，利用羧甲基浓度随反应时间的变化建立了动力学方程，计算得到解聚反应的活化能为87.8kJ/mol。

Investigation on the depolymerization of polytrimethylene terephthalate in methanol

The depolymerization of polytrimethylene terephthalate in methanol was carried out in an autoclave reactor. The effects of reaction temperature and reaction time on the reaction were investigated. The results showed that the yields of monomers were dependent on the reaction temperature and reaction time. The variation of carboxymethl group in the solid-products were analyzed by gel permeation chromatograph. A kinetic model was used to describe the reaction, which fitted well with the experimental data. The dependence of rate constant on the reaction temperature was correlated by the Arrhenius plot giving the activation energy of 87.8 kJ/mol.