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Received February 11, 2009
Accepted April 21, 2009
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Scratch resistance and oxygen barrier properties of acrylate-based hybrid coatings on polycarbonate substrate
Green Engineering Team, Korea Institute of Industrial Technology, 35-3, Hongchon-ri, Ibjang-myeon, Cheonan 330-825, Korea 1Department of Applied Chemical Engineering, Dankook University, Anseo-dong, Cheonan 330-825, Korea 2Departmet of Chemical Engineering, Kyonggi University, 94-6 Yiui-dong, Youngtong-gu, Suwon 443-760, Korea
Korean Journal of Chemical Engineering, November 2009, 26(6), 1550-1555(6), 10.1007/s11814-009-0263-y
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Abstract
Organic/inorganic hybrid coating materials were synthesized using acrylate end-capped polyester, 1,6-hexanediolacrylate, tetraethoxysilane (TEOS), and _x000D_
3-trimethoxysilylpropylmethacrylate (TMSPM). The hybrid materials were cast onto a polycarbonate (PC) substrate and cured by UV irradiation to give a hybrid film with covalent linkage between the inorganic and the organic networks. The coating layer was characterized by FT-IR and 29Si-NMR, and pencil hardness and oxygen permeation rate of coated films were investigated. The pencil hardness of all samples examined in this study was higher than 1H, whereas that of uncoated PC substrate was 6B. The hardness enhancement after coating may due to incorporation of organic acrylate resin. The oxygen permeability coefficient of the film coated with hybrid material on 3-aminopropyltriethoxysilane (APTEOS) pretreated polycarbonate substrate was 1.67×10^(-3) GPU, the lowest value in this work, whereas that of uncoated PC substrate was 8.07×10^(-3) GPU. The lower oxygen permeation rates of these films are attributed to the good adhesion between organic/inorganic hybrid coating layer and PC substrate and a dense structure induced by an increase of network density.
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References
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Jackson CL, Bauer BJ, Nakatami AI, Barnes JD, Chem. Mater., 8, 727 (1996)
Gilberts J, Tinnemans AHA, Hogerheide MP, Koster TPM, J. Sol-Gel Sci. Technol., 11, 153 (1998)
Chen Z, Wu L, Chwa E, Tham O, Materials Science and Engineering A, 493, 292 (2008)
Jang K, Kim JS, Lee S, Kim H, Solid State Phenomena, 124, 683 (2007)
Vrancken KC, Decoster L, Vandervoort P, Grobet PJ, Vansant EF, J. Colloid Interface Sci., 170(1), 71 (1995)
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