Abstract
The effect of metal (Co and Zn) isopropylxanthates over the range of 0.3 to 2.5% (w/w) on the photodegradation of poly(2,6-dimethyl-1,4-phenylene oxide) film was examined, by changes in the carbonyl i.r. absorption, hydroperoxide, weight average molecular weight and quantum yield of the polymer samples. The data have been processed to yield the heats of activation of the system. The photodegradation of the polymer was affected by the kind of metal, concentration of the xanthates, wavelength of irradiated light, and by the temperature. Zinc isopropylxanthate was found as a photostabilizer whereas cobalt isopropylxanthate merely enhanced the degradation. The presence of metal xanthates changed the u.v. spectra of the polymer.
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