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Proceedings Paper

Primary processes of photopolymerization or photocrosslinking in dichromated systems
Author(s): Michel Bolte
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Paper Abstract

The photoredox process occurring between HCrO4- and a vinyl monomer (acrylamide or acrylonitrile) leads to the formation of chromium(III) and the polymer as final photoproducts. The primary process is a charge transfer between HCrO4- in the excited state and the monomer giving rise to chromium(V) and to an organic radical initiator of the polymerization. The influence of pH, monomer concentration, absorbed light intensity Ia and chromium(VI) concentration on the polymerization rate Rp are reported. Two different domains are detected as a function of chromium(VI) concentration: at low concentration, the process of chain termination occurs by mutual annihilation of the macroradicals whereas at high concentration a process of oxidative termination of the radicals by chromium(VI) is involved. The influence of copper(II) on these different processes is also described.

Paper Details

Date Published: 20 January 1994
PDF: 12 pages
Proc. SPIE 2042, Photopolymers and Applications in Holography, Optical Data Storage, Optical Sensors, and Interconnects, (20 January 1994); doi: 10.1117/12.166337
Show Author Affiliations
Michel Bolte, Univ. Blaise Pascal (France)


Published in SPIE Proceedings Vol. 2042:
Photopolymers and Applications in Holography, Optical Data Storage, Optical Sensors, and Interconnects
Roger A. Lessard, Editor(s)

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