Petroleum Refinery Engineering ›› 2025, Vol. 55 ›› Issue (7): 56-59.

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Comparative study on spinnable mesophase pitch based on different feedstock

Zhang Xinyue, Guo Dan, Wu Yun, Zhang Yuanyuan, Liang Xitong, Li Shiwen, Li Ruzhen   

  1. SINOPEC (Dalian) Research Institute of Petroleum and Petrochemicals Co., Ltd., Dalian, Liaoning 116045
  • Online:2025-07-15 Published:2025-07-21

基于不同原料的可纺中间相沥青对比研究

张馨月, 郭丹, 武云, 张媛媛, 梁晰童, 李诗文, 李汝振   

  1. 中石化（大连）石油化工研究院有限公司, 辽宁省大连市116045
  • 作者简介:张馨月, 助理工程师, 硕士研究生, 2022年毕业于新加坡国立大学材料科学与工程专业, 主要研究高端碳材料制备技术。联系电话: 15904996369, E-mail: zhangxinyue.fshy@sinopec.com
  • 基金资助:
    中国石化重大科技项目（124106）

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Abstract:

Taking four typical spinnable mesophase pitches (coal-based CT-MP, naphthalene-based AR-MP, and petroleum-based PR-MP1 and PR-MP2) as research objects, the differences in structural composition and performance characteristics among the samples were comparatively analyzed. It was found that the selected coal- and oil-based spinnable mesophase pitches are more suitable for producing high thermal conductivity fibers, while the selected naphthalene-based spinnable mesophase pitch has greater advantages for producing high modulus carbon fibers. The high-end oil-based spinnable mesophase pitch sample exhibits better performance than the other two samples due to its higher content of naphthenic structures and aliphatic side chains, moderate softening point, higher molecular arrangement regularity, and wider low-viscosity stable region, enabling the longest stable melt-spinning time and being of great significance for improving the quality of high-performance asphalt-based carbon fibers.

Key words: mesophase pitch, coal tar pitch, petroleum pitch, naphthalene pitch, structural analysis, thermal stability, rheological properties, spinnability

摘要：

以4种典型的可纺中间相沥青（煤系样品CT-MP、萘系样品AR-MP、油系样品PR-MP1与PR-MP2）为研究对象，对比分析了不同样品之间结构组成、性能特征的差异。发现，选取的煤系与油系可纺中间相沥青更适合生产高导热纤维；选取的萘系可纺中间相沥青在生产高模量碳纤维方面优势较大；高端的油系可纺中间相沥青样品较另外两种样品性能更优，原因在于其含有更多的环烷结构和脂肪族支链，具有最适中的软化点、更高的分子排列规整度以及更宽的低黏平稳区，能够实现最长时间稳定熔融纺丝，对高性能沥青基碳纤维品质的提升具有重要意义。

关键词: 中间相沥青, 煤焦油沥青, 石油沥青, 萘沥青, 结构分析, 热稳定性, 流变性能, 可纺性能