Y. Korai, Hidetoshi Oka, Seong-hwa Hong, I. Mochida, Isamu Kato
{"title":"Transverse Sphere and Texture of Carbon Fibers Prepared through Cross Shaped Nozzles of Different Lobe Dimensions","authors":"Y. Korai, Hidetoshi Oka, Seong-hwa Hong, I. Mochida, Isamu Kato","doi":"10.15017/7904","DOIUrl":null,"url":null,"abstract":"Methylnaphthalene <bived mesophase pitch was spun through Y- and cross- shaped nozzles of different lobe dimensions in temperature range of 280 to 295°C by fixing the spinning rate to evaluate die-swelling phenomena which defonned cross-sectional shape and domain alignment of the carbon fiber. The higher temperature of spinning enhanced the refonnation through the lower viscosity. The thinner lobe emphasized the die-swelling through the larger shear rate, which reduces the viscosity, although the nozzles of the present study had the same cross-sectional area. Shape factors of the nozzle and fiber rescribe the extents of cause and results of die-swelling, respectively. Die-swelling is found to change the radial type alignment of the constituent domains to random order. The degrees of preferred orientation along the fiber axis were slightly influenced by die-swelling. The pressure in spinning and the nozzle shape were correlated to the reformation extent of the resultant fiber.","PeriodicalId":22886,"journal":{"name":"The reports of Institute of Advanced Material Study Kyushu University","volume":"60 1","pages":"7-11"},"PeriodicalIF":0.0000,"publicationDate":"1999-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The reports of Institute of Advanced Material Study Kyushu University","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.15017/7904","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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