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Effects of fluorinated substituents on the refractive index and optical radiation resistance of methacrylates

机译：Effects of fluorinated substituents on the refractive index and optical radiation resistance of methacrylates

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AbstractNovel fluorinated methacrylate polymers were synthesized. The purpose was to produce polymers with low refractive indices and increased resistance to optical radiation damage. Six different fluorinated substituents were appended on the monomer before polymerization. Optical‐quality samples were prepared, and their transmission spectra, through 0.8 cm thick samples, were obtained. Each sample was tested for refractive index and glass transition temperature. The samples absorbed 10 MRad gamma radiation from a60Co source in an air environment; their transmission spectra were recorded immediately after irradiation and again after seven days had elapsed. As expected, increasing the fluorine content in the side chains resulted in decreased refractive indices. Fluorine content also influenced optical radiation stability. One polymer, poly(1H,1H‐heptafluorobutyl methacrylate) retained superior UV/visible transmission after irradiation. © 1993 John WileySons,

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