한국섬유공학회지 (Textile Science and Engineering)

  • 제41권5호
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  • Pages.347-357
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  • 2004
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  • 1225-1089(pISSN)
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  • 2288-6419(eISSN)
한국섬유공학회 (The Korean Fiber Society)
권호 표지

성형 전 용액상태에서 요드화된 폴리비닐알코올 필름의 연신 및 요드 제거에 관한 연구

Study on the Drawing and Deiodination of the Poly(vinyl Alcohol) Film Iodinated in Solution Before Casting

  • 손현식 (동아대학교 의상섬유학부 섬유공학전공) ;
  • 신은주 (동아대학교 의상섬유학부 섬유공학전공) ;
  • 이양헌 (동아대학교 의상섬유학부 섬유공학전공)
  • 발행 : 2004.10.01
⟨ 이전 논문 다음 논문 ⟩

초록

Two kinds of poly(vinyl alcohol)(PVA) films iodinated in solution before casting (IBC) with weight gains of 100%(slightly crystalline) and 150%(completely amorphous) were drawn at room temperature. Iodine was eliminated by immersing the films in sodium thiosulfate solutions in ethylene glycol(EG)/water and N-methylformamide(NMFA) followed by washing and drying. The degree of swelling of undrawn film on deiodination was lower and the deiodination time was longer in the NMFA solution than in the EG/water solution. All the undrawn films after deiodination and drying exhibited considerable and mutually similar crystallinity. While a major portion of the crystallization occurred in the course of drying after immersing in the EG/water solution, the larger half of the crystallization occurred in the course of immersing in the NMFA solution. Drawability of the IBC film was very high even at room temperature to readily produce a draw ratio of 8. The degree of swelling of the drawn film on deiodination decreased continuously and the deiodination time increased and then decreased with increasing draw ratio. The degree of swelling and the deiodination time were relatively low and long, respectively, when the NMFA solution was used as solvent. The crystallinity, orientation, initial modulus of the drawn films after deiodination and drying increased with draw ratio, and was relatively high when the NMFA solution was used as solvent and the weight gain were lower.

키워드

참고문헌

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