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KMID : 1059520090530060755
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Journal of the Korean Chemical Society
2009 Volume.53 No. 6 p.755 ~ p.760
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Physical Properties of Styrene Copolymer and Contact Lens Application
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Kim Tae-Hun
Ye Ki-Hun
Sung A-Young
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Abstract
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Styrene is broadly used as a polymer and a copolymer and is useful in manufacturing contact lenses due to its high refractive index. This study used styrene with the cross-linker EGDMA (ethylene glycol dimethacrylate), HEMA (2-hydroxyethyl methacrylate) and the initiator AIBN (azobisisobutyronitrile) for copolymerization. Measurement of the physical characteristics of the copolymerized material showed that the refractive index is 1.4412 ~ 1.4628, water content 20 ~ 35%, visible transmittance 82.6 ~ 87% and the tensile strength 0.143 ~ 0.344 Kgf. Also, measurements showed that the refractive index and tensile strength increased while the water content decreased as the ratio of styrene increased. Based on the results of this study, the produced copolymer can be estimated to be suitable for use as a material for high performance functional contact lenses.
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KEYWORD
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Styrene, Refractive index, Water content, Optical transmissibility
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