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首页> 外文期刊>Journal of Macromolecular Science. Physics >Thermal Degradation Kinetics of Plasticized Poly (Vinyl Chloride) with Six Different Plasticizers
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Thermal Degradation Kinetics of Plasticized Poly (Vinyl Chloride) with Six Different Plasticizers

机译：塑化聚（氯乙烯）的热降解动力学与六种不同的增塑剂

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摘要

Plasticized PVC formulated with different kinds of normally used plasticizers, including bis(2-ethylhexyl) phthalate (DOP), dioctyl terephthalate (DOTP), acetyl tri-n-butyl citrate (ATBC), acetyl trioctyl citrate (ATOC), trioctyl trimellitate (TOTM), and a new vegetable devived plasticizer, isosorbide ester (ID-37), were prepared by a melt blending method. The effect of plasticizer on the thermal degradation behavior of plasticized PVC was investigated by thermal gravimetric analysis (TGA). The activation energies were calculated by three well known methods, developed by Flynn-Wall-Ozawa (FWO), Friedman and Kissinger, respectively. The TGA conducted in N-2 atmosphere showed that the type of plasticizer had an obvious influence on the thermal stability of plasticized PVC. It was found that the peak temperatures (T-P) of the thermal degradation processes shifted to higher temperature with the increase of the heating rate, with two processes being shown. The activation energy of the first thermal decomposition process (E-1), calculated by the Kissinger method, was between 118 and 130kJ/mol, while the activation energy of the second thermal decomposition process (E-2) was between 261 and 305kJ/mol, except 499kJ/mol for the PVC/TOTM formulation. The corresponding values of E-1 and E-2 obtained by the Flynn-Wall-Ozawa method were similar to the above data. E of the sample with TOTM also showed a higher value than the others; the results demonstrated that the PVC plasticized with TOTM was more thermally stable than with the others. The activation energies for certain conversion degrees were calculated by the Friedman method and the FWO method. The value of activation energy for 20%, 50%, and 80% conversion calculated by the Friedman method, exhibited an apparent difference from that calculated by the Flynn-Wall-Ozawa method; the results showed that the value of E obtained by the Friedman method was much more reasonable than that obtained by the Flynn-Wall-Ozawa method.
机译：用不同种类的通常使用的增塑剂配制的增塑PVC，包括双（2-乙基己基）邻苯二甲酸酯（DOP），苯二甲酸二辛酯（DOTP），乙酰基三丁酯（ATBC），乙酰三乙基柠檬酸乙酰乙烯酯（ATOC），三烯基纺丝酯（通过熔融共混方法制备Totm）和新的植物寿命增塑剂，异山梨醇酯（ID-37）。通过热重分析（TGA）研究了增塑剂对增塑PVC热降解行为的影响。激活能量通过三种众所周知的方法计算，分别由Flynn-Wall-Ozawa（FWO），弗里德曼和基辛格开发。在N-2气氛中进行的TGA表明，增塑剂的类型对塑化PVC的热稳定性有明显影响。发现热劣化过程的峰值温度（T-P）随着加热速率的增加而升高到较高的温度，有两个过程。通过吻指针方法计算的第一热分解过程（E-1）的激活能量在118至130kJ / mol之间，而第二热分解过程（E-2）的激活能量在261至305kJ之间/ Mol，除了PVC / Totm配方的499kJ / mol之外。通过Flynn-Wall-ozawa方法获得的E-1和E-2的相应值类似于上述数据。用TOTM的样品e也显示出比其他样品更高;结果表明，用Totm塑化的PVC比与其他PVC更热稳定。通过Friedman方法和FWO方法计算某些转换度的激活能量。通过Friedman方法计算的20％，50％和80％转化的活化能量值表现出由Flynn-Wall-ozawa方法计算的表观差异;结果表明，通过Frannn-Wall-ozawa方法获得的e获得的E的值更加合理。

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