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The effects of time-dependent morphology changes on the photochemical degradation efficiencies of polymers were investigated using the segmented polyurethane 1. A segmented polyurethane was chosen for this study because segmented polyurethanes have distinct hard (crystalline) and soft (amorphous) morphologies in the solid-state. It is known that, as these polymers cure, the hard and soft domains expand...
The effect of temperature on the degradation quantum yield of a poly(vinyl chloride) polymer with Cp2Mo2(CO)6 units incorporated into its chains was studied (Cp = cyclopentadienyl). The polymer is photochemically reactive in the absence of oxygen because the CpMo(CO)3 radicals formed by photolysis of the Mo–Mo bonds react with C–Cl bonds to form CpMo(CO)3Cl units. Quantum yields as a function of temperature...
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