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首页> 外文期刊>Journal of Applied Polymer Science >KINETICS OF CARBONIZATION AND GRAPHITIZATION OF PBO FIBER
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KINETICS OF CARBONIZATION AND GRAPHITIZATION OF PBO FIBER

机译：PBO纤维的碳化和石墨化动力学

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PBO [poly(p-phenylenebenzobisoxazole)] fiber has been shown to convert to an ordered carbon fiber without the need for stabilization. This article presents the first detailed analysis of the carbonization and graphitization behavior of this unique material. The carbonization process was modeled as a series of free-radical reactions, and thermogravimetric analysis was used to determine an activation energy of 76 +/- 6 kcal/mol for the thermal initiation of free radicals. The initiation reaction data then were applied to determine the temperature dependence of the termination reaction. Additionally, the development of long-range order in the graphitizing fiber was examined. The spacing between graphene planes was shown to decrease with increasing treatment temperature and soak duration. Carbonized PBO fibers developed more long-range order than carbon fibers produced from other polymers, which may partially explain why these PBO-based fibers display excellent lattice-dependent properties. Finally, an Arrhenius analysis found the activation energy for graphitization to be 120 +/- 17 kcal/mol. (C) 1996 John Wiley & Sons, Inc. [References: 21]
机译：PBO [聚（对苯撑苯并二恶唑）纤维]已显示无需稳定即可转变为有序碳纤维。本文介绍了这种独特材料的碳化和石墨化行为的首次详细分析。将碳化过程建模为一系列自由基反应，并使用热重分析法确定自由基热引发的活化能为76 +/- 6 kcal / mol。然后将引发反应数据用于确定终止反应的温度依赖性。另外，研究了石墨化纤维中长程有序的发展。石墨烯平面之间的间距显示随着处理温度和浸泡时间的增加而减小。碳化的PBO纤维比其他聚合物生产的碳纤维具有更长的有序性，这可以部分解释为什么这些基于PBO的纤维表现出出色的晶格依赖性。最后，Arrhenius分析发现石墨化的活化能为120 +/- 17 kcal / mol。 （C）1996 John Wiley＆Sons，Inc. [参考：21]

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