Article
  • Stability Change of Poly(vinyl alcohol)-Iodine Complexes Due to Moisture Absorption
  • Ha HO, Kim DS
  • 수분 흡수에 의한 폴리(비닐 알코올)-요오드 복합체의 결합 안정성 변화
  • 하현욱, 김대수
Abstract
We have investigated the transmittance change of a polyvinyl alcohol (PVA)-iodine polarizer to observe the stability change of PVA-iodine complexes due to moisture absorption. The polarizer dipped in the water showed transmittance difference because of the stability difference between PVA and iodine complexes. The transmittance of 380, 480 and 620 nm bands increased only 0.005, 0.017 and 0.023%, respectively but that of 410 and 525 nm bands increased up to 0.27 and 0.05%, respectively. The transmittance of longer than 680 nm increased drastically from the beginning of moisture absorption and the wavelength of the drastic transmittance rise shifted to shorter wavelength region with moisture absorption time. To find a reason for the stability difference of the PVA-iodine complexes, the chemical change of PVA film and the transmittance change of dried polarizer were observed after moisture absorption.

이 연구에서 수분 흡수에 의한 폴리비닐알코올-요오드(PVA-iodine) 복합체들의 결합 안정성을 확인하기 위하여, PVA-iodine계 편광 필름을 침수시킨 후 가시 광선 영역의 투과도 변화를 관찰하였다. 침수 3시간 후 PVAiodine 복합체들간의 결합 안정성 차이에 따른 투과도 차이가 관찰되었다. 380, 480 및 620 nm 영역의 투과도는 각각 0.005, 0.017 및 0.023% 상승하여 변화가 작았지만 410 및 525 nm 영역의 투과도는 각각 0.27 및 0.05% 상승하여 수분 흡수에 따른 PVA-iodine 복합체들간의 결합 안정성에 차이가 있음이 확인되었다. 680 nm 이상의 장파장 영역은 수분 흡수 초기부터 투과도가 급격히 증가하고, 흡수 시간이 증가할수록 투과 파장이 단파장으로 이동함이 관찰되었다. PVA-iodine 복합체들의 결합 안정성 차이의 원인을 찾기 위해 PVA 필름의 수분 흡수에 따른 화학적 변화를 관찰하였을 뿐만 아니라, 침수 후 건조된 편광 필름의 투과도 차이 영역에서 PVA의 화학적 차이를 살펴보았다.

Keywords: PVA-iodine polarizer; moisture absorption; stability change; PVA-iodine complexes; transmittance difference

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2017; 41(3): 507-513

    Published online May 25, 2017

  • 10.7317/pk.2017.41.3.507
  • Received on Nov 14, 2016
  • Accepted on Jan 31, 2017