UV/오존에 의해 개질된 폴리프로필렌의 표면 조성 변화

Surface Composition Change of UV/Ozone Modified Polypropylene

  • 김재익 (경희대학교 환경응용화학부) ;
  • 류승훈 (경희대학교 환경응용화학부)
  • Kim, J.I. (College of Environment and Applied Chemistry Kyung Hee University) ;
  • Ryu, S.H. (College of Environment and Applied Chemistry Kyung Hee University)
  • 발행 : 2002.03.31

초록

UV 조사시간과 오존유량을 변화시키면서 폴리프로필렌을 UV/오존 산화하였으며 이의 표면특성을 접촉각과 XPS를 이용하여 살펴보았다. 산화된 표면의 노화거동을 공기, 물, 에틸렌 글리콜 하에서 살펴보았으며, 또한 lap shear 실험을 통하여 접착력을 관찰하였다. 극성표면 에너지와 접착력은 UV/오존 처리시간과 오존유량이 증가함에 따라 증가함을 알 수 있었다. 물에서 노화실험을 한 경우 극성표면 에너지의 변화가 없었으나, 공기 하에서 실시한 경우 2-3일 이내에 급격히 감소하여 처리하지 않은 폴리프로필렌의 값에 근접하였다.

Polypropylene is oxidized with UV/ozone as a function of UV treatment time and ozone flow rate and its surface characteristics are investigated using contart angle measurements and XPS. The aging behavior of oxidized surface is investigated under air, water and ethylene glycol as the aging media. Adhesion strength is also investigated using a lap shear test. Polar surface energy increases with increasing UV/ozone treatment time as well as ozone flow rate. No polar surface energy change is observed under water aging, while under air aging it decreases significantly within 2-3 days and reaches the close value as that of the untreated PP. Adhesion strength increases with increasing UV/ozone treatment time as well as ozone flow rate.

키워드

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