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August 1, 1983Journal of The Electrochemical Society

The Mechanism of the Cross Linking of Poly(Vinyl Alcohol) by Ammonium Dichromate with U.V.‐Light

Lukas Grimm K. ‐J. Hilke Eric A. Scharrer

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Abstract

The phosphor raster of color TV screens is produced by the exposure of photosensitive coats to ultraviolet light. On the basis of existing papers and our own experiments, a model is presented showing the mechanism of the photosensitive reaction between poly(vinyl alcohol), ammonium dichromate, and water. A complex redox reaction takes place between the three components, leading to chromium (III) ions and poly(vinyl alcohol) cleavage products with terminal carboxyl groups. There is interaction to chelate complexes, thus resulting in a three‐dimensional poly(vinyl alcohol) network insoluble in water.

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Cite This Study

Grimm et al. (1983) studied this question.

synapsesocial.com/papers/6a74ca636a5eb4b8f50929e1 https://doi.org/10.1149/1.2120089

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