标题：The Coagulation Process of Nascent Fibers in PAN Wet-spinning
作者：Chen Juan; Ge Heyi; Liu Huashi; Li Guozhong; Wang Chengguo
作者机构：[Chen, J] School of Material Science and Engineering, University of Jinan, Ji'nan 250022, China;[ Ge, H] School of Material Science and Engineering, U 更多
通讯作者地址：[Ge, HY]Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China.
关键词：PAN; wet-spinning; coagulation; nascent fibers
摘要：The evolvement of microstructure and properties of nascent fibers during coagulation process in the polyacrylonitrile (PAN) wet-spinning and the effect of coagulation bath conditions on the structure and properties of the nascent fibers were investigated by the means of X-ray diffraction (XRD), scanning electron microscope (SEM), fiber fineness machine, fiber tensile strength machine, etc. The experimental results indicate that the nascent fibers become denser and have fewer inner defects, the diameter of nascent fibers shrink and the crystallization degree of nascent fibers gradually increases with the increasing of coagulation time. Too large spinning tension leads to grooves occurring on surface of fibers. To obtain circular cross-section of nascent fibers the optimal coagulation conditions are 50 degrees C, 65% (concentration) and 0.9 (draw ratio).