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KMID : 1059520090530030340
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Journal of the Korean Chemical Society
2009 Volume.53 No. 3 p.340 ~ p.344
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Copolymerization and Contact Lens Application of HEMA-Substituted Polyphosphazene
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Kim Tae-Hun
Sung A-Young
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Abstract
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HEMA/vinyl-substituted polyphosphazene was prepared by the ring-opening polymerization of phosphonitrillic chroride trimer at 200~300 oC, followed by Grignard reaction with vinyl magnesium bromide and then by the reaction with HEMA(2-hydroxyethyl methacrylate). HEMA/vinyl-substituted polyphosphazene was copolymerized with EGDMA(ethylene glycol dimethacrylate; used as a cross-linker for the free-radical copolymerization), NVP (N-vinyl-pyrrolidone) in the presence of AIBN (azobisisobutyronitrile) as a radical initiator. The oxygen transmissibility, water content and visible-ray transmissibility of the resulting copolymer were measured to be Dk/t 88, 30.89% and 87%, respectively, indicating that the copolymer can be used as a good contact lens material.
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KEYWORD
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Polyphosphazene, HEMA, Oxygen transmissibility
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