作业帮英语翻译During thethermal degradation of XPS,the activation ener
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英语翻译
During thethermal degradation of XPS,the activation energy increases before a= 0.25 andthen the value stabilizes in the range of 220–230 kJ·mol−1.Through theentire process,the E values of XPS are always smaller than that of EPS andthey show different dependence on the degree of conversion.This reveals thatunder nitrogen environment,the thermal degradation of XPS is easier than EPS.In the range of a=0.1–0.85 for thermal degradation of EPS,the differences ofactivation energies are very small in regard to experimental errors and the average value of E is about245 kJ·mol−1,thus we can regard the value of E as a constant.It indicates that the thermaldegradation process of EPS in a nitrogen environment can be approximated as asingle reaction step.At the initial and final stage of the reaction of thethree materials,the change of E values is larger and the results show a highstandard.
During thethermal degradation of XPS,the activation energy increases before a= 0.25 andthen the value stabilizes in the range of 220–230 kJ·mol−1.Through theentire process,the E values of XPS are always smaller than that of EPS andthey show different dependence on the degree of conversion.This reveals thatunder nitrogen environment,the thermal degradation of XPS is easier than EPS.In the range of a=0.1–0.85 for thermal degradation of EPS,the differences ofactivation energies are very small in regard to experimental errors and the average value of E is about245 kJ·mol−1,thus we can regard the value of E as a constant.It indicates that the thermaldegradation process of EPS in a nitrogen environment can be approximated as asingle reaction step.At the initial and final stage of the reaction of thethree materials,the change of E values is larger and the results show a highstandard.
在 XPS 的热降解过程中,在a= 0.25之前,活化能增加前,然后在 220–230 kJ•mol−1 的范围内趋于稳定.综观全过程, XPS 的活化能一直低于EPS,他们显示出对转换的不同依赖度.这表明在氮环境下,XPS 的热降解比 EPS 更容易.a= 0.1–0.85在范围内, EPS的热降解活化能的偏差具有非常小的实验误差,EPS热降解活化能的平均值约 245 kJ•mol−1,因此我们可以将此值视作为常数.它表明EPS 在氮环境中的热降解过程可以近似为一个一级反应.这三种物质的降解反应从初始阶段至终了阶段的活化能变化较大,其结果显示出了高标准.
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