열처리 조건에 따른 폴리아크릴로니트릴 섬유의 형태 및 물성

Effects of Heat Treatment Condition on the Morphology and Mechanical Properties of Polyacrylonitrile(PAN) Fiber

  • 방윤혁 (부산대학교 공과대학 섬유공학과) ;
  • 조현혹 (부산대학교 공과대학 섬유공학과)
  • 발행 : 1994.11.01

초록

As-spun filament of copolyacrylonitrile(AN/MA=95/5w1%) has been prepared and subsequcntly stretched. The stretched filaments which contain moisture were shrunk freely by 5%~25% on heating in dry air at 130~17$0^{\circ}C$. The change of morphology and mechanical properties was examined by various techniques such as thermal mechanical analyzer(TMA), scanning electron microscopy(SEM). rheovibron and tension. After heat treatment, residual shrinkage of fiber decreased significantly with increasing shrinkage, while it was little affected by heat treatment temperature. Electron microscopy revealed that surfaces of acrylic fibers were grooved along the fiber axis. The grooves developed by the collapse of voids during the process of drying increased slightly with increasing shrinkage and heat treatment temperature. Maximum tan § peak became broader with increasing shrinkage. Consequently, enhancement in thermal dimensional stability and mechanical properties of fibers treated under these conditions(16$0^{\circ}C$$\times$10%) may be due to an optimum increase of dipole bonds between -CN groups.

키워드

참고문헌

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