Abstract
9-Methylanthracene (9MA) photo-sensitizes the oxidation of styrene-butadiene copolymer (SBR). This effect was explained as being associated mainly with the ability of 9MA to form singlet oxygen. The calculated quantum efficiency of singlet oxygen formation resulting from the quenching by oxygen of electronic excited states of 9MA is high ( γ Δ M = 0·74 ± 0·04). This indicates that 9MA should be a rather efficient photo-sensitizer in photo-oxidation processes.
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