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    Production of high tenacity graphitic fibrous materials
    7.
    发明授权
    Production of high tenacity graphitic fibrous materials 失效
    生产高强度石墨纤维材料

    公开(公告)号：US3954950A

    公开(公告)日：1976-05-04

    申请号：US354469

    申请日：1973-04-25

    申请人： Michael J. Ram ,  Arnold J. Rosenthal ,  Charles M. Clarke

    发明人： Michael J. Ram ,  Arnold J. Rosenthal ,  Charles M. Clarke

    IPC分类号： D01F9/22 ,  C01B31/07

    CPC分类号： D01F9/22

    摘要： A process is provided for the efficient conversion of acrylonitrile homopolymer fibrous materials and closely related acrylonitrile copolymer fibrous materials to graphitic fibrous materials of high tenacity. The process incorporates an initial brief fiber healing step which is conducted at a temperature of about 170.degree. to 220.degree.C., a preoxidation step, and a tandem carbonization/graphitization step as described. The relationship of the various variables required to produce the high tenacity graphitic fibrous product is set forth in the equation provided. In a preferred embodiment of the invention the carbonization/graphitization step of the process is conducted on a reliable and stable basis wherein the desired tenacity is achieved without the necessity of resorting to the exertion of high longitudinal tensions upon the preoxidized acrylic fibrous material.

    摘要翻译： 提供了一种将丙烯腈均聚物纤维材料和密切相关的丙烯腈共聚物纤维材料有效转化为高韧性的石墨纤维材料的方法。 该方法包括在约170℃至220℃的温度，预氧化步骤和如所述的串联碳化/石墨化步骤进行的初始短暂纤维愈合步骤。 所提供的方程式列出了产生高强度石墨纤维产品所需的各种变量的关系。 在本发明的优选实施方案中，该方法的碳化/石墨化步骤在可靠和稳定的基础上进行，其中实现所需的韧性，而不需要在预氧化的丙烯酸纤维材料上施加高纵向张力。