中文摘要：

运用TG-DSC-IR—MS联用分析技术研究了模塑发泡聚苯乙烯（EPS）保温材料在空气环境下的热解特性。研究表明，EPS在空气中的热解是一个放热过程，主要有一个阶段，随着升温速率的增加，最大热解速率对应的峰温有所升高，热解起始、终止温度也相应提高；EPS的热解过程是先软化熔融，之后长链断裂成较短的链，再解聚成小分子、低摩尔质量单体及其多聚体挥发物，主要分解产物有炔类物质、CO2、C、C4H3、C4H4、醛类及醇类物质；运用Ozawa—Flynn-Wall等转化率法求得活化能的平均值为90．7kJ／mol。

英文摘要：

The thermal decomposition characteristics of expanded polystyrene （EPS） in air environment was studied by using TG-DSC-MS-F17R simultaneous analysis method. The thermal analysis research indicated that there was one main weight loss processes during the thermal decomposition of expanded polystyrene. At higher heating rates, the maximum thermal decomposition shifted to a higher reaction temperature accompanied by an increase in the initial and external temperature. The effect of heating rate on thermal decomposition was very significant as the peak volatilization temperature of the expanded polystyrene sample. When expanded polystyrene was heated, it softened and melted first, then the long chains broke to shorter chains, and last the shorter chains depolymerized to small molecular, the low molecular weight monomer and the volatile matter of its polymer. The main products from the thermal decomposition of expanded polystyrene in air were the aldehydes material, CO2, C, C4 H3, C4H4, and so on. Ozawa-Flynn-Wall method study revealed the average activation energy of expanded polystyrene was 90. 7 kJ mol^ -1