聚丙烯腈原丝在强磁场条件下的微观结构分析  

The Analysis of Microstructure of Polyacrylonitrile Precursor in High Magnetic Field

作　　者：任小孟[1] 王源升[1,2] 梅永佳[1] 夏正才 何特[4] 

机构地区：[1]海军工程大学化学材料系,湖北武汉430033 [2]四川大学高分子材料工程国家重点实验室,四川成都610065 [3]国家脉冲强磁场科学中心,湖北武汉430074 [4]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《高分子材料科学与工程》2012年第7期51-54,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51073098);高分子材料工程国家重点实验室(四川大学)开放课题(KF200901)

摘　　要：聚丙烯腈(PAN)原丝微观结构中存在的缺陷极大会影响炭纤维的强度。采用0T、8T、12T、16T的强磁场对原丝进行处理,研究了磁场对原丝的结晶取向度、总取向度、结晶尺寸、结晶度等微观结构的影响。结果表明,磁场对纤维的晶区和非晶区都有取向作用,其取向度都随磁场强度的增大和磁场作用时间的延长而增加。磁场还能促使非晶区向晶区转变,使结晶尺寸、结晶度和密度均得到提高。Polyacrylonitrile（PAN） precursor was an important material to produce carbon fiber,however,its microstructure,especially the defects,had a significant effect on the strength of carbon fiber.The precursor was processed in 0T,8T,12T,16T high magnetic fields.The effects of magnetic field on crystal orientation,total orientation,crystal size,crystallinity were studied.The results show that magnetic field can induce the orientation in both crystal and amorphous regions.The orientation increases as the magnetic field intensity strengthens and the same result could be obtained when the processing time extends.Magnetic field can promote the conversion from the amorphous region to the crystal region,resulting at an increase of crystal size,crystallinity and density.Therefore,defects of fiber decreases and the strength of fibers increases.

关 键 词：强磁场 聚丙烯腈 原丝 取向 微观结构 

分 类 号：TQ342.31[化学工程—化纤工业]