123rd General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code MAT.P-482
Subject Effect of Styrene-PVP Interaction on the Properties of Silicone Hydrogel Lens
Authors Min-Jae Lee, A-Young Sung*
Department of Optometry, Daegu Catholic University, Korea
Abstract This research was carried out in order to analyze the effect of Styrene-PVP interaction on the properties of silicone hydrogel lens. Styrene group and PVP (Polyvinylpyrrolidone) were used as additives for the basic combination containing silicone monomer, TSMA (trimethylsilyl methacrylate) and DMA (n,n-dimethylacrylamide) added to the mix at ratios of 1~10%. The silicone hydrogel lens was produced by a cast-mold method. The polymerized lens sample was hydrated in a 0.9% saline for 24 hours before the optical and physical characteristics of the lens were measured. Measurement of the physical characteristics of the produced material showed that the refractive index is 1.3682~1.4321, water content 77.11~45.73%, visible light transmittance 95.14~88.20%, and tensile strength 0.0652~0.3113kgf. The results showed the decrease of refractive index as the ratio of additives and the water content also decreased. The result of the stabilization test of polymerization showed increase of extractables as the ratio of additives, but the difference was not significant in all the samples, so it can be judged that the stabilization of the polymer was maintained. Therefore, the interaction of styrene and PVP should be in consideration of the effect on the physical properties of silicone hydrogel lens.
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