• Studies on the Syndiotactic Poly(vinyl alcohol) Polarizing Film -Iodine Desorption Behavior of High Molecular Weight Syndiotactic Poly(vinyl alcohol)/Iodine Complex Film-
  • Lyoo WS, Yeum JH, Choi JH, Ji BC, Yoon WS, Noh TH, Ghim HD, Kim JP
  • 신디오탁틱 폴리비닐알코올 편광필름에 관한 연구 - 고분자량 신디오탁틱 폴리비닐알코올/요오드 복합체 필름의 요오드 탈착 거동 -
  • 류원석, 염정현, 최진현, 지병철, 윤원식, 노태환, 김한도, 김재필
Abstract
High molecular weight syndiotactic poly(vinyl alcohol)(HMW s-PVA) with number-average degree of polymerization of 10000 and syndiotactic diad content of 61.5%/iodine complex film was prepared. Its adsorption and desorption behaviors of iodine in hot water were investigated. In comparison with atactic PVA film or low molecular weight s-PVA film, the degree of solubility of s-PVA film and the iodine desorption of HMW s-PVA/iodine film in hot water were limited to an extremely lower level. As the soaking time increased, the iodine desorption in hot water was increased. This reason might be explained by the fact that as the soaking time increased, so the iodine adsorption increased not by the stable molecular complex between PVA and iodine but by the simple physical adsorption of iodine.

수평균 중합도 10000 및 신디오탁틱 다이애드기 함량 61.5%의 고분자량 신디오탁틱 폴리비닐알코올(high molecular weight syndiotactic poly(vinyl alcohol) (HMW s-PVA))/요오드계 편광필름을 제조하고 이의 흡착 거동 및 열수 하에서의 요오드의 내구성을 고찰하였다. 아탁틱 PVA 및 저분자량 s-PVA/요오드계 필름과 비교할 때 열수하에서의 HMW s-PVA 필름의 용해도 및 HMW s-PVA/요오드계 필름의 요오드 탈착은 현저히 억제되었다. 요오드 침지시간이 길어질수록 열수하에서의 요오드 탈착현상이 점차 심화되었다. 이는 처리 시간이 길어짐에 따라 PVA 분자와 요오드 분자간에 안정한 복합체가 형성되기보다는 물리적인 흡착에 의하여 흡착량이 증가하였기 때문이라고 설명된다.

Keywords: high molecular weight; syndiotactic; s-PVA/iodine film; degree of solubility; desorption

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  • Polymer(Korea) 폴리머
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This Article

  • 2001; 25(1): 115-121

    Published online Jan 25, 2001

  • Received on Jun 10, 2000