Abstract For the first time, polyvinyl chloride (PVC) was used as an easily-handled chlorine source for preparation of isotropic pitch-based carbon fiber (IPCF) incorporating ethylene bottom oil (EO) as a raw material. Pitch precursors were prepared by the chlorination–dehydrochlorination triggered by chlorine radicals originated from PVC; aromatization and poly-condensation reactions occurred by polyene-type radicals from PVC. Radical production and co-carbonization were facilitated by pretreatments of EO through vacuum distillation, bromination, and additional heat treatment. Pitches were prepared by the co-carbonization of pretreated EO and EO containing 20 wt% PVC, and had higher yields and better spinnability than those by simple distillation.

中文翻译：

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乙烯底油与聚氯乙烯共碳化制备沥青基碳纤维各向同性沥青前驱体

摘要 聚氯乙烯（PVC）首次作为易处理的氯源制备以乙烯底油（EO）为原料的各向同性沥青基碳纤维（IPCF）。沥青前驱体是由源自 PVC 的氯自由基引发的氯化-脱氯化氢反应制备的；芳构化和缩聚反应是由 PVC 中的多烯型自由基发生的。通过真空蒸馏、溴化和额外热处理对 EO 进行预处理，促进了自由基生产和共碳化。沥青是通过预处理的 EO 和含有 20 wt% PVC 的 EO 共碳化制备的，与简单蒸馏相比，具有更高的产率和更好的可纺性。