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摘要
通过调整泵供量和喷丝板孔径尺寸得到不同直径的聚丙烯腈(PAN)凝固纤维,采用核磁(NMR)和电子探针(EPMA)定量表征纤维中溶剂二甲基亚砜(DMSO)含量和溶剂在纤维径向上的分布情况,采用广角X射线衍射(XRD)表征纤维的晶态结构。结果表明:随着PAN凝固纤维直径增大,纤维中溶剂含量增多、结晶度降低。当纤维直径增大到95μm以上时,纤维径向上溶剂分布产生不均匀性,芯部较多而表层较少。
Abstract
Polyacrylonitrile (PAN) fibers with different diameters were obtained by adjusting the pump supply and spinneret pore size.The solvent content and its radial distribution of PAN nascent fibers were quantitatively characterized by NMR and EPMA,and the crystal structure of PAN fibers was characterized by XRD.The results shown that with the diameter increase of PAN nascent fibers,the solvent content in the fiber increased and the crystallinity decreased.When the diameter of the fiber increased to more than 95μ m,the solvent distribution in the radial direction of PAN nascent fiber was uneven,with more in the core of nascent fibers and less in the surface of nascent fibers.
关键词
聚丙烯腈
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凝固纤维尺寸
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电子探针
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溶剂含量
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溶剂分布
Key words
polyacrylonitrile fiber
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nascent fiber diameter
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electron probe micro-analyzer
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solvent content
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solvent distribution
聚丙烯腈原丝制备过程中的凝固尺寸效应研究[J].
化工新型材料, 2021, 49(7): 126-128 DOI:10.19817/j.cnki.issn 1006-3536.2021.07.029
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基金资助
装备预研教育部联合基金项目(6141A02033231和6141A02033223);国防基础科研计划项目(JCKY2018110C139)
