带型聚丙烯腈纤维制备及其预氧化反应特性研究  

Preparation and pre-oxidation characteristics of strip polyacrylonitrile fiber

作　　者：张顺 陈洞 刘杰[2] 赵振文 徐樑华[3] 李常清[2,3] Zhang Shun;Chen Dong;Liu Jie;Zhao Zhenwen;Xu Lianghua;Li Changqing(Weihai Tuozhan Fiber Co.,Ltd.,Weihai 264211;State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029;Key Laboratory of Carbon Fiber and Functional Polymer,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029)

机构地区：[1]威海拓展纤维有限公司,威海264211 [2]北京化工大学有机无机复合材料国家重点实验室,北京100029 [3]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《化工新型材料》2019年第12期156-159,共4页New Chemical Materials

基　　金：山东省碳纤维技术创新中心（CX2019-01）

摘　　要：采用具有带型喷丝孔的喷丝板湿法纺丝制备带型聚丙烯腈纤维,研究了纺丝牵伸对聚丙烯腈截面形态和力学性能的影响,以及截面形态对聚丙烯腈纤维预氧化反应程度的影响。结果表明:凝固牵伸、一级牵伸和二级牵伸越大,得到的带型聚丙烯腈原丝截面尺寸越小,凝固阶段纤维形变率更大;带型原丝截面尺寸越小,拉伸强度越大。预氧化热处理时,带形纤维截面尺寸越小,预氧纤维体密度越大、H/C含量比值越小、O/C比值越大,表明预氧化反应程度越高。当带形纤维截面短轴尺寸大于圆形纤维直径时,其预氧纤维皮芯比越小。The strip polyacrylonitrile fibers were prepared by wet spinning with spinneret of strip holes.The effects of spinning drafting on the cross-sectional morphology and mechanical properties of fibers were studied,as well as the effect of cross-sectional morphology on the degree of pre-oxidation reaction of fibers.The results shown that the larger the coagulation drafting,first-order drafting and second-order drafting,the smaller the cross-section size of the strip precursor,the larger the deformation rate of the fibers in the coagulation stage.The smaller the cross-section size of the strip precursor,the greater the tensile strength.The smaller the cross-section size of ribbon fibers,the larger the density,the smaller the H/C content ratio and the larger the O/C ratio of pre-oxidized fibers,indicating the higher the degree of pre-oxidation reaction.When the short axis size of the cross-section in ribbon fibers was larger than the diameter of circular fibers,the smaller the skin-core ratio of pre-oxidized fibers.

关 键 词：聚丙烯腈纤维 带型截面 截面尺寸 纺丝牵伸 预氧化反应程度 

分 类 号：TQ342.742[化学工程—化纤工业]