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研究了不同分子量聚苯乙烯在氮气气氛下不同升温速率的热分解动力学，认为聚苯乙烯的热分解动力学机制模型为D3和A0.6模型，即为扩散控制和咸核及生长机理。结果表明，不同聚苯乙烯的活化能在155．49KJ～256．36KJ之间，其活化能和热稳定性受分子量的影响。
The thermal decomposition kinetics of polystyrene with different heating rates at different heating rates was studied. The thermal decomposition kinetics model of polystyrene was assumed to be D3 and A0.6 models, which are diffusion control, salinization and growth mechanism. The results showed that the activation energies of different polystyrenes ranged from 155.49KJ to 256.36KJ, and their activation energy and thermal stability were affected by the molecular weight.