摘要
中间相沥青基炭纤维的性能直接取决于纺丝用中间相沥青,煤直接液化沥青因其饱和烃含量高,氢碳比高,高温融变性好,硫含量低等优点成为制备纺丝用中间相沥青的优良前驱体。本文以煤直接液化沥青为原料,研究不同热缩聚工艺对中间相沥青组成和结构的影响,通过考察其偏光织构、软化点、喹啉不溶物含量、黏温曲线和纺丝时长等指标综合评价可纺性。采用高低温结合多段聚合工艺制得具有大融并体结构、可纺性优良的中间相沥青,并进一步制得具有理想微观形貌的纤维,其拉伸强度为2.03 GPa,拉伸模量达到581 GPa。
The performance of mesophase pitch based carbon fibers directly depends on the spinning mesophase pitch.Coal direct liquefaction pitch has become an excellent precursor to prepare spinnable mesophase pitch due to its high saturated hydrocarbon content,high hydrogen carbon atomic ratio,good high-temperature melting properties,and low sulfur content.Coal direct liquefaction pitch was used as raw material to study the effects of different thermal condensation processes on the composition and structure of mesophase pitch.The spinnability of mesophase pitch was comprehensively evaluated by examining its polarizing texture,softening point,quinoline insoluble content,viscosity temperature curve,and spinning time.A mesophase pitch with a large domain texture and excellent spinnability was prepared using multi-stage polymerization process at both high and low temperatures The graphitized fibers with ideal cross-section microstructure,tensile strength of 2.03 GPa and tensile modules of 581 GPa were prepared.
作者
向柠
常鸿雁
刘青钰
窦睿智
程时富
Xiang Ning;Chang Hong-yan;Liu Qing-yu;Dou Rui-zhi;Cheng Shi-fu(China Shenhua Coal to Liqiud and Chemical Shanghai Research Insititute,Shanghai 201108,China)
出处
《炭素技术》
CAS
北大核心
2023年第6期59-63,共5页
Carbon Techniques
关键词
煤直接液化沥青
中间相沥青
热缩聚工艺
炭纤维
Coal direct liquefaction pitch
mesophase pitch
thermal polycondensation
carbon fiber
