Hologram formation reconsidered in dichromated polyvinylalcohol: polymer cross-linking around chromium (V)

Michele Bolte; Yael Israeli; Fatma Djouani; Agnes Rivaton; Lawrence Frezet; Roger A. Lessard

doi:10.1117/12.590395

21 April 2005 Hologram formation reconsidered in dichromated polyvinylalcohol: polymer cross-linking around chromium (V)

Michele Bolte, Yael Israeli, Fatma Djouani, Agnes Rivaton, Lawrence Frezet, Roger A. Lessard

Author Affiliations +

Proceedings Volume 5742, Practical Holography XIX: Materials and Applications; (2005) https://doi.org/10.1117/12.590395
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

The photochemical behavior of dichromated polyvinylalcohol (DCPVA) films was analysed upon exposure at 365 nm in connection with the hologram quality recorded in such a photosensitive material. The evolution of both involved species, chromium and polyvinylalcohol, were quantified by implementing an innovative approach. This approach combines the monitoring of the structural modification of the polymeric matrix and the fate of the various chromium species ((VI), (V) and (III)). For the first time, it was established that chromium (V) was at the origin of the cross-linking implied in the hologram formation by acting as a bridge between hydroxyl groups of the polymeric chains. A second unanswered question was also elucidated. The improvement brought by ammonium dichromate with respect to potassium dichromate involves amide groups as additional chelating sites for chromium (V) resulting in the increase of the matrix cross-linking.

Citation Download Citation

Michele Bolte, Yael Israeli, Fatma Djouani, Agnes Rivaton, Lawrence Frezet, and Roger A. Lessard "Hologram formation reconsidered in dichromated polyvinylalcohol: polymer cross-linking around chromium (V)", Proc. SPIE 5742, Practical Holography XIX: Materials and Applications, (21 April 2005); https://doi.org/10.1117/12.590395

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