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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 36, Number 1
JKCSEZ 36(1)
February 20, 1992

Title	Characterization of Surface of Polyvinylalcohol-graft-poly (2,2,2-trifluoroethyl methacrylate) Copolymer Polyvinylalcohol-graft-poly (2,2,2-trifluoroethyl methacrylate) Copolymer 의 합성과 표면 특성에 관한 연구
Author	Hee Ju Chae, Lee Seok Joon, Sohk Won Ko 채희주, 이석준, 고석원
Keywords
Abstract	Ce4+ ion을 개시제로 사용하여 폴리비닐알코올에 2,2,2-trifluoroethyl methacrylate를 그라프트중합 반응시켜 새로은 PVA/perfluoroalkylmethacrylate 그라프트 공중합체들을 합성하였다. 수소 결합능이 큰 폴리비닐알코올에 여러 가지 그라프트율을 갖는 공중합체의 표면 자유에너지를 이 고체 표면들과 여러가지 액체와의 접촉각을 측정하여 구하였다. Perfluoroalkyl group이 그라프팅이 커짐에 따라 고체의 표면 자유에너지는 감소하며, 그 고체들은 극성 부분에 의해 기여되는 힘이 크므로 극성 고체의 분자 특성을 고려한 식으로부터 γsi을 구하여 임계 표면 에너지 γc를 계산하였다. New graft copolymers were synthesized by grafting 2,2,2-trifluoroethylmethacrylate on polyvinylalcohol in aqueous solution with Ce4+ ions as initiator. Surface free energies of copolymers having various grafting percentages were studied by measurements of contact angles for various liquids. As the grafting of perfluoroalkyl group increases, surface free energy of solid decreases. Estimation of critical surface free energy should be accounted for molecular properties because the polar force components of these solids are relatively great. γc was calculated from the plot of γsi vs Φsl.
Page	131 - 136
Full Text	PDF

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