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Low dose Co 60 radiation of nylon 66 and poly(vinyl alcohol) in the presence of methanol–water–allyl methacrylate (AMA) mixtures allows crosslinking of the polymers. In both cases, crosslinking is facilitated by the presence of the polyfunctional monomer and does not occur in its absence. Nylon gel fractions of 40% have been obtained after a dose of 3 Mrad; poly(vinyl alcohol) gel fractions of over 75% have been obtained after 5 Mrad. With both polymers, the gel fraction is dependent upon the radiation dose, AMA level, and water level during radiation.
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Bernstein et al. (1965) studied this question.
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