Microvoids present in anisotropic mesophase pitch, their as-spun and annealed fibers

Hojung Yang, Seong-Ho Yoon, Yozo Korai, Isao Mochida, Osamu Katou

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The sizes of free volumes in the mesophase pitches, as-spun and annealed fibers were measured by positron annihilation lifetime spectroscopy (PALS). The size of free volume increased with increasing of methyl groups in the mesogen molecules. Spinning increased the free volume while annealing after the spinning decreased it to similar value of the starting pitch.

Original languageEnglish
Pages (from-to)168-169
Number of pages2
JournalChemistry Letters
Volume32
Issue number2
DOIs
Publication statusPublished - Feb 5 2003

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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