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Proceedings Paper

Dichromated photosensitive materials: involvement of the polymeric matrix
Author(s): Michele Bolte; Yael Israeli; Agnes Rivaton; Lawrence Frezet; Roger A. Lessard
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Paper Abstract

Irradiation of dichromated polyvinyl alcohol and dichromated polyacrylic acid DC(PVA-PAA) at 365 nm was investigated in order to understand the involvement of the polymeric matrix in the reduction process of the Cr(VI) leading to the formation of the hologram. The photochemical evolution of the matrix was directly correlated to the disappearance of the absorbing species, chromium(VI). A special attention was paid to the absorption profile of the films. Due to the impermeability of the polymer, no oxidation proceeded. The reduction of Cr(VI) into Cr(V) induced the formation of carboxylate species perfectly correlated with the consumption of carboxylic groups. Besides the acido-basic reaction undergone by the carboxylic groups, the reduction of Cr(VI) provoked the cross-linking of the polymer. Each polymer appears to play a specific role in the mechanism.

Paper Details

Date Published: 29 June 2004
PDF: 8 pages
Proc. SPIE 5290, Practical Holography XVIII: Materials and Applications, (29 June 2004); doi: 10.1117/12.529102
Show Author Affiliations
Michele Bolte, LPMM/CNRS-Univ. Blaise Pascal (France)
Yael Israeli, LPMM/CNRS-Univ. Blaise Pascal (France)
Agnes Rivaton, LPMM/CNRS-Univ. Blaise Pascal (France)
Lawrence Frezet, LPMM/CNRS-Univ. Blaise Pascal (France)
Roger A. Lessard, COPL/Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 5290:
Practical Holography XVIII: Materials and Applications
Tung H. Jeong; Hans I. Bjelkhagen, Editor(s)

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