Publication Details (including relevant citation information):
Blakey, I.; George, G. A., Polymer Degradation and Stability 2000, 70 (2), 269-275.
Raman spectral mapping at a microscopic scale has been used to probe the heterogeneous photo-oxidn. of unstabilized single particles and films of polypropylene (PP). Anal. of resonance Raman spectra in conjunction with SEM/EDX data allowed detn. of the distribution of polymn. catalyst residues throughout the polymer. However, the distribution of oxidn. products was found not to correlate with the distribution of catalyst. Consequently, a conclusion was drawn that the catalyst residues, for the type of PP studied, tend to stabilize the polymer in the immediate vicinity, but also form reactive species that diffuse away from the catalyst to initiate oxidn.
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