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首页> 外文期刊>Journal of Applied Polymer Science >High-resolution thermogravimetry of poly(4-methyl-1-pentene)
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High-resolution thermogravimetry of poly(4-methyl-1-pentene)

机译：聚（4-甲基-1-戊烯）的高分辨率热重分析

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摘要

Thermal degradation and kinetics of poly(4-methyl-1-pentene) were investigated by nonisothermal high-resolution thermogravimetry at a variable heating rate. Thermal degradation temperatures are higher, but the maximum degradation rates are lower in nitrogen than in air. The degradation process in nitrogen is quite different from that in air. The average activation energy and frequency factor of the first stage of thermal degradation for the poly(4-methyl-1-pentene) are 2.4 and 2.8 times greater in air than those in nitrogen, respectively. Poly(4-methyl-1-pentene) exhibits almost the same decomposition order of 2.0 and char yield of 14.3-14.5 wt % above 500 °C in nitrogen and air. The isothermal lifetime was estimated based on the kinetic parameters of nonisothermal degradation and compared with the isothermal lifetime observed experimentally.
机译：通过非等温高分辨率热重分析法以可变加热速率研究了聚（4-甲基-1-戊烯）的热降解和动力学。热降解温度较高，但氮的最大降解速率低于空气。氮气中的降解过程与空气中的降解过程完全不同。聚（4-甲基-1-戊烯）在热降解的第一阶段的平均活化能和频率因数在空气中分别是氮的2.4和2.8倍。聚（4-甲基-1-戊烯）在氮气和空气中，在500℃以上的温度下，分解顺序几乎相同，为2.0，焦炭收率为14.3-14.5 wt％。根据非等温降解的动力学参数估算等温寿命，并将其与实验观察到的等温寿命进行比较。

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