섬유

processes in sulfur dioxide treatment of pan fibers

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 351
when pan fibers containing 4percent methyl acrylate, 3.2 denier, react with so/sub 2/ at increasing temperature up to 290 degreesc, the reaction is slow below 230 degreesc and rapidly increases thereafter. the effects of up to 20 w/o s have been studied. the incorporation of s leads to an increase in fiber diameter. reduction of dta exotherm with increasing s content suggests that the fibers become more oxidation resistant, which is confirmed experimentally. increase of secondary modulus and decrease of extension to failure values suggest the presence of cross-links: this is also indicated by ir absorption at 1690 cm/sup -1/
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