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http://dx.doi.org/10.5012/jkcs.2009.53.3.340

Copolymerization and Contact Lens Application of HEMA-Substituted Polyphosphazene  

Kim, Tae-Hum (Department of Ophthalmic Optics, Daebul University)
Seong, A-Young (Department of Ophthalmic Optics, Daebul University)
Publication Information
Journal of the Korean Chemical Society / v.53, no.3, 2009 , pp. 340-344 More about this Journal
Abstract
HEMA/vinyl-substituted polyphosphazene was prepared by the ring-opening polymerization of phosphonitrillic chroride trimer at $200{\sim}300\;{^{\circ}C}$, 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.
Keywords
Polyphosphazene; HEMA; Oxygen transmissibility;
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