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首页> 外文期刊>Journal of Applied Polymer Science >Kinetics and thermodynamics of hydrolytic depolymerization of poly(ethylene terephthalate) at high pressure and temperature
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Kinetics and thermodynamics of hydrolytic depolymerization of poly(ethylene terephthalate) at high pressure and temperature

机译：聚对苯二甲酸乙二醇酯在高温高压下水解解聚的动力学和热力学

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Hydrolytic depolymerization of PET (polyethylene terephthalate) waste in excess of water was studied using a 0.5-L stirred high-pressure autoclave at temperatures of 100, 150, 200, and 250degreesC and at 200, 300, 400, 500, 700, and 800 psi (pounds per square inch) pressure. Velocity constants of hydrolysis were calculated from the experimental data obtained. Maximum depolymerization (91.38%) of PET into monomer was obtained at 250degreesC and 800 psi. pressure. However, the maximum rate of reaction was recorded at 200degreesC and 500 psi temperature and pressure, respectively. The energy of activation and frequency factor were calculated, as 64.13 KJ/g mol and 7.336 X 10(4) min(-1), respectively, for higher pressure and temperature conditions. It was also reported that the hydrolytic depolymerization is first order with the velocity constant 1.773 X 10(-2) min(-1) at 250degreesC. (C) 2003 Wiley Periodicals, Inc. [References: 19]
机译：使用0.5升搅拌高压釜在100、150、200和250摄氏度以及200、300、400、500、700和800的温度下研究了PET（聚对苯二甲酸乙二酯）废料的水解解聚psi（磅/平方英寸）压力。由获得的实验数据计算水解速度常数。在250°C和800 psi下获得最大的PET解聚度（91.38％）。压力。但是，最大反应速率分别在200℃和500 psi的温度和压力下记录。对于较高的压力和温度条件，活化能和频率因数分别计算为64.13 KJ / g mol和7.336 X 10（4）min（-1）。还据报道，在250℃下，水解解聚是一级的，速度常数为1.773×10（-2）min（-1）。 （C）2003 Wiley Periodicals，Inc. [参考：19]

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