Continuous distribution kinetics for degradation of polystyrene in sub- and supercritical toluene

被引：0
|
作者：
Huang, Ke [1 ]
Tang, Li-Hua [1 ]
Zhu, Zi-Bin [1 ]
Ying, Wei-Yong [1 ]
机构：
[1] Institute of Chemical Technology, East China University of Science and Technology, Shanghai 200237, China
来源：
Journal of Analytical and Applied Pyrolysis | 2006年 / 76卷 / 1-2期
关键词：
When the degradation of polystyrene is carried out above 300 °C; the process of degradation is very complex with concurrent random scission and chain-end scission including depolymerization; intramolecular transfer and followed β-scission which produce volatile products. A quick- depolymerization assumption was proposed to simplify the reaction mechanism of this process. Based on this assumption; continuous distribution kinetics was used to describe the model of polystyrene degradation at the mechanistic level. Toluene was used as solvent to study the sub- and supercritical degradation of polystyrene at 310-370 °C and high yields of volatile products were obtained. The experimental data supported the assumption and determined rate coefficients of random scission and chain-end scission. The activation energies of random scission and chain-end scission; determined from the temperature dependence of the rate coefficients; were; 43.2; and; 42.7; kcal/mol; respectively;
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页码：186 / 190
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