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- W2044897673 abstract "Abstract— Reaction of singlet oxygen ( 1 Δ g , 1 O 2 ) with cis ‐polyisoprene yields an allylic hydroperoxide with an olefinic double bond shifted in the polymer chain. The photochemical decomposition of the resultant hydro‐peroxide and the subsequent polymer chain scission kinetics have been studied in the absence of oxygen. Quantum yields of hydroperoxide decomposition range from 3.1 to 8.4 in cyclohexane, depending on the initial amount of hydroperoxide in the polymer. On the other hand, the quantum yields for polymer chain scission are low, and vary with the frequency of the incident light. The ratio for number of polymer scissions per number of hydroperoxy groups decomposed is of the order of 10 ‐2 . The polymer chain degradation is sensitized by the addition of ketones. Based on these data, a reaction mechanism for the overall photodegradation of the cis ‐polyisoprene initiated by singlet oxygen is proposed." @default.
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- W2044897673 date "1978-10-01" @default.
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- W2044897673 title "PHOTOCHEMISTRY OF <i>cis</i>‐POLYISOPRENE AND ITS SINGLET OXYGEN ADDUCT" @default.
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- W2044897673 doi "https://doi.org/10.1111/j.1751-1097.1978.tb06971.x" @default.
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