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首页> 外文期刊>Journal of Applied Polymer Science >Influence of ozone on chemical reactions during the stabilization of polyacrylonitrile as a carbon fiber precursor
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Influence of ozone on chemical reactions during the stabilization of polyacrylonitrile as a carbon fiber precursor

机译：臭氧对聚丙烯腈作为碳纤维前体的稳定过程中化学反应的影响

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摘要

Chemical shrinkage was used for the in situ measurement of the progressing chemical stabilization reactions and the influence of ozone during the stabilization of polyacrylonitrile. A method for evaluating the activation energy through the sensitivity temperature is presented. The calculated results show that the activation energies were 161.57 kJ/mol in air and 181.23 kJ/mol in ozone-enriched air. Therefore, the chemical reactions were postponed during stabilization in ozone-enriched air. Ozone seemed to act in three ways: first, ozone promoted the formation of the serious skin-core structure. Second, ozone accelerated the chemical reactions and shortened the stabilization time at lower heating rates. Third, ozone postponed the chemical reactions. (C) 2008 Wiley Periodicals, Inc.
机译：化学收缩率用于进行中的化学稳定反应的原位测量以及聚丙烯腈稳定过程中臭氧的影响。提出了一种通过敏感温度评估活化能的方法。计算结果表明，活化能在空气中为161.57 kJ / mol，在富含臭氧的空气中为181.23 kJ / mol。因此，在富含臭氧的空气中稳定化过程中化学反应被推迟了。臭氧似乎以三种方式起作用：首先，臭氧促进了严重的皮肤核心结构的形成。其次，臭氧在较低的加热速率下加速了化学反应并缩短了稳定时间。第三，臭氧推迟了化学反应。 （C）2008 Wiley期刊公司

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