KINETICS OF GLYCOLYSIS OF POLY(ETHYLENE-TEREPHTHALATE) MELTS
KINETICS OF GLYCOLYSIS OF POLY(ETHYLENE-TEREPHTHALATE) MELTS
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DOI：
10.1002/app.1994.070541115
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发表时间：
1994-12-12
影响因子：
3
通讯作者：
COOPER, DG
中科院分区：
文献类型：
--
作者：
CAMPANELLI, JR;KAMAL, MR;COOPER, DG
在压力反应器中，在高于 245 摄氏度的温度下检查聚对苯二甲酸乙二醇酯 (PET) 熔体与乙二醇的反应。发现反应速率取决于温度以及液体乙二醇和聚合物中亚乙基二酯基团的浓度。发现为反应初始阶段提出的动力学模型与实验数据一致。研究发现，乙二醇的内催化作用在PET的糖酵解解聚中并不起重要作用。计算了三种不同温度下的糖酵解速率常数，产生的活化能为 92 kJ/mol。锌盐在 245 摄氏度以下对 PET 的糖酵解具有催化作用，但在该温度以上似乎不会影响糖酵解速率。 (C) 1994 约翰威利父子公司
The reaction of poly(ethylene terephthalate) (PET) melts with ethylene glycol was examined in a pressure reactor at temperatures above 245 degrees C. The reaction rate was found to depend on temperature and on the concentrations of liquid ethylene glycol and of ethylene diester groups in the polymer. A kinetic model proposed for the initial period of the reaction was found to be consistent with experimental data. It was found that internal catalysis by ethylene glycol does not play an important role in the glycolytic depolymerization of PET. The rate constants for glycolysis were calculated for three different temperatures, yielding an activation energy of 92 kJ/mol. Zinc salts, which have a catalytic effect on glycolysis of PET below 245 degrees C, do not appear to influence glycolysis rates above that temperature. (C) 1994 John Wiley and Sons, Inc.