Preparation of pitches for carbon fiber production


El Akrami H., Yardim M., Atakul H., Ekinci E.

10th International Conference on Coal Science, Taiyuan, China, 12 - 17 September 1999, pp.925-928 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Taiyuan
  • Country: China
  • Page Numbers: pp.925-928

Abstract

In this study pitches were produced from Turkish Avgamasya asphaltite and Raman Dincer crude oil by solvent extraction, pyrolysis followed by vacuum distillation air blowing methods. Pitches were characterized using elemental analysis and softening temperature determination. Spinability of pitches were also investigated. Results showed that the softening point of some pitches could be increased up to 250 degrees C by vacuum distillation. However; the yield of pitches decreased with increasing softening point. Air blowing caused reduction in hydrogen content and increase in oxygen contents. As far as the spinabilty is concerned, pitches that are originated from Avgamasya asphaltite by air blowing could not be spun. On the other hand, pitches obtained by solvent extraction and vacuum distillation resulted in spinable green fibres. Some of the Raman Dincer pitches prepared by vacuum distillation,, were found to have excellent spinable characteristics.