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Title of Journal: Korean J Chem Eng

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Abbravation: Korean Journal of Chemical Engineering

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Springer US

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DOI

10.1016/0009-2614(75)80048-0

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1975-7220

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Diffraction efficiency change in PVA/AA photopolym

Authors: Daeheum Kim Seungwoong Nam Jiyun Lim
Publish Date: 2008/09/16
Volume: 25, Issue: 4, Pages: 874-
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Abstract

The highest diffraction efficiency DE value after illumination and postcuring of photopolymer films were obtained at the SeO2/Acrylamide AA Ratios of AA 30 g SeO2 10 g and the DE’s were stable values of over 90 By the addition of SeO2 the maximum DE at the initial stage of illumination was reached at 300 seconds which suggests SeO2 slows down the photopolymerization of DE variation curve for the optimum composition during extendedtime illumination of 9000 seconds resembles a sine curve due to the combination of the monomer diffusion and the photopolymerization and the photopolymer film expanded at about 8 after photopolymerization due to monomer migration

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