Al-backed PVF film shows more photodegradation than does the nonmetalized PVF film. The effect of several metal substrates (Al, Cu, Ag, and Au) on the photodegradation of polyacrylonitrile (PAN) has been examined. Under oxidative conditions, the order of PAN photodegradation in M/PAN
films is shown to be Cu/PAN ≫ PAN ≫ Al/PAN > Au/PAN > Ag/PAN. Formation of carbonyl group during the photodegradation is predominant in the cases of Al and Au. Under nonoxidative conditions there is no evidence of carbonyl group formation, but the photodegradation of Cu/PAN is
still substantial. Under oxidative conditions the Cu/PAN film begins to char after approximately one hour, compared with four and a half hours under nonoxidative conditions. The photodegradation mechanism in the range of 250 ≤ λ ≤ 400 nm suggests the formation of M(CN)x
species, but no such species are detected spectroscopically at the energy employed. A catalytic effect of metal films on the photodegradation of PAN is obvious.
Department of Chemistry, University of Denver, Denver, Colorado 80208 2:
Solar Energy Research Institute, 1617 Cole Blvd., Golden, Colorado 80401
Publication date: July 1, 1987
More about this publication?
The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)