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불소함유 랜덤 공중합체의 표면 특성
Surface Properties of Random Copolymer Containing Perfluoroalkyl Ethyl Acrylate
HWAHAK KONGHAK, June 1992, 30(3), 303-309(7), NONE
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Abstract
공중합 단량체로 perfluoroalkyl ethyl acrylate(FA)혼합물, 스테아릴메타아크릴레이트와 염화비닐리덴을 사용하여 용액 중합에 의해 FA공중합체를 합성하였다. 유리판에 이 공중합체의 피막을 형성시켜 DCAA(Dynamic Contact Angle Analyzer)로 접촉각을 측정함으로써 FA 공중합체의 표면특성을 분석하였다. FA 공중합체의 고유의 접촉각을 얻기 위해서는 피막 형성시 FA 공중합체의 고형분 농도가 0.08wt% 이상인 피막 형성 용액을 사용해야 한다. FA 공중합체의 발유성은 발수성에 비하여 FA 공중합체의 FA 함량에 크게 영향을 받으며, FA 공중합체의 임계표면장력도 FA 함량에 아주 민감하게 변한다. FA 공중합체의 FA 함량이 40-60wt% 범위에서 임계표면장력은 18.0과 8.2dyne/cm사이의 값을 보인다. FA 공중합체의 표면에너지 추정에 Young-Fowkes-Good식과 Young-Daelble식이 적합하다. FA 공중합체의 표면에너지는 거의 dispersion component 만으로 구성된다.
Perfluoroalkyl ethyl acrylate(FA) copolymers were prepared by solvent polymerization using FA mixture, stearylmethacrylate and vinylidene chloroide as comonomers. A film of FA copolymer was formed on a slide glass, and its surface properties were analyzed by measuring the contact angles with DCAA(Dynamic contact Angle Analyzer). the solid content of FA copolymer in the copolymer cating solution used to prepare the film of FA copolymer should be above 0.08wt%. The oil repellency of FA copolymer is more dependent upon the FA content of FA copolymer than the water repellency. The critical surface tension of FA copolymers varies sensitively with FA content. The critical surface tension of FA copolymers, whose FA content is in the range of 40-60wt%, shows a value between 18.0 and 8.2 dyne/cm. Young-Fowkes equation and Young-Kaelble equation are suitable for the prediction of surface energy of FA copolymer. The surface energy of FA copolymers consists of mainly dispersion component.
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