Abstract
The effect of several metal substrates (Al, Cu, Ag, and Au) on the photodegradation of polyethylene terephthalate (PET) and polyvinyl fluoride (PVF) films has been examined. The effect of M on M/PET systems under both oxidative and non-oxidative conditions shows that the orders of photodegradation are: Cu/PET ≫ A1/PET > PET > Au/PET > Ag/PET (non-oxidative) and Cu/PET ⋙ PET > A1/PET > Au/PET > Ag/PET (oxidative). The effect of M on M/PVF films when irradiated under non-oxidative conditions shows that all metals have an adverse effect on the photodegradation of these films. Under oxidative conditions, Cu/PVF shows extreme photodegradation while the other M/PVF films show far less photodegradation than under the non-oxidative conditions. The trends in photodegradation are as follows: A1/PVF ≫ Cu/PVF > Au/PVF > Ag/PVF > PVF (non-oxidative) and Cu/PVF ≫ PVF > A1/PVF > Au/PVF > Ag/PVF (oxidative).
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