Abstract
The presence of hydroxyl radicals during aging (“ripening”) of alkali cellulose has been confirmed by selective trapping. As none of the spin traps available to date was working under such strongly alkaline conditions, a novel, alkali‐stable trapping agent was developed, γ‐tocopheryl‐iso‐propyl ether. This spin trap reacts selectively with hydroxyl radicals, but not with other reactive oxygen species or radicals present. The presence of hydroxyl radicals was confirmed additionally by the inhibition of the chain degradation in the presence of the OH‐trap, which allowed estimating the contribution of OH radicals to the overall degradation of alkali cellulose during aging.
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