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- W1969484101 abstract "Results from the study of singlet oxygen reaction with cis-1,4-polyisoprene and with various models are compared. The nature of the products and their reactivity are discussed for two kinds of models, namely oligodienes and trisubstituted mono-olefins with various substituent length. The reactivity of the double bond decreases with lengthening of the alkyl substituents but the reactivity of 4-methyl-4-octene is close to that of the polymer. The hydroperoxidation of a unit in an oligodiene does not deactivate significantly the adjacent units towards singlet oxygen addition. The reactivity of the allylic hydrogen a, b, and c in the olefin depends on both the position and the length of the substituents and follows the sequences K c > k b > k a. The principle of syn-ene addition can be extrapolated to polyisoprene. The rate constant determined for the cis-1,4-polyisoprene 1O2 reaction allows the conclusion that the probability of reaction of 1O2 with the solid polymer may be high. Similarity in the behaviour of polymer and models in this reaction allows for the estimation of the reactivity of other unsaturated or reactive polymers towards 1O2." @default.
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- W1969484101 date "1985-01-01" @default.
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- W1969484101 title "Reactions of singlet oxygen with polyisoprene and model compounds" @default.
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- W1969484101 doi "https://doi.org/10.1016/s0040-4020(01)96585-8" @default.
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