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- W1972269233 abstract "Laser exposure (at 488nm) of 2, 6-di(4′-methoxyphenyl)-4-phenylpyrylium hexafluoroantimonate (Pyr) in cycloaliphatic epoxy resin (CY 179) caused partial polymerization at laser dosage of 1.4J/cm2. Less reactive bisphenol-A epoxy (Epon 828) underwent partial polymerization at laser dosage of 7.0J/cm2. More complete polymerization of Epon 828 was observed at the same dose in the presence of 1, 6 hexanediol. Direct interaction of alcohol with the pyrylium excited state was demonstrated by fluorescence quenching. A Stern-Volmer plot and determination of pyrylium excited state lifetime allowed calculation of the rate constant for this reaction. The value of 3.8x108L equiv-1s-1 is indicative of an efficient interaction which is proposed to result in the photogeneration of protons. In contrast to the photochemical studies, thermally-induced polymerization of epoxy was not enhanced in the presence of alcohols." @default.
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- W1972269233 date "1996-01-01" @default.
- W1972269233 modified "2023-10-13" @default.
- W1972269233 title "Laser Induced Cationic Polymerization of Epoxy Resins Using 2,6-Di(4'-methoxyphenyl)4-Phenylpyrylium Hexafluoroantimonate. Effect of Alcohols on Photo and Thermal Polymerization." @default.
- W1972269233 doi "https://doi.org/10.2494/photopolymer.9.729" @default.
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