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E-mail: say@sehan.ac.kr(Received August 22, 2012; Accepted September 6, 2012).   triacetoxyvinlysilane    EGDMA (ethylene glycol dimethacrylate) HEMA(2-hydroxyethyl methacrylate), MMA (methyl methacrylate), MA (methacrylic acid)   AIBN (azobisisobutyronitrile)   .      ,  35.63~32.44%,  1.4382~1.4480,  89.0~92.5%,  0.346~0.674 kgf .    triacetoxyvinlysilane   1% hexamethylene diisocyanate       hexamethylene diisocyanate 1%        .                  .: Triacetoxyvinylsilane, Hexamethylene diisocyanate, ABSTRACT. The copolymerization of triacetoxyvinylsilane, EGDMA (ethylene glycol dimethacrylate as a cross-linker),HEMA (2-hydroxyethyl methacrylate), MMA (methyl methacrylate), MA (methacrylic acid) was performed in the presenceof AIBN (2,2’-azobisisobutyronitrile) as an initiator. Measurement of the physical properties of the resulting copolymersshowed that water content, refractive index, visible ray transmittance, and tensile strength were in the range of 35.63~32.44%,1.4382~1.4480, 89.0~92.5% and 0.346~0.674 kgf, respectively. The values of tensile strength of copolymers-containing hex-amethylene diisocyanate were higher than those of the copolymers containing triacetoxyvinylsilane. From the results we cameto the conclusion that the produced copolymers are suitable for the application of ophthalmic contact lens with high tensilestrength, wettability and duraility.Key words: Triacetoxyvinlysilane, Hexamethylene diisocyanate, Tensile strength

Effect of Isocyanate Group on the Physical Properties of Hydrogel Contact Lenses Containing Silane