The effect of structure of trunk polymer on radiation co-polymerization has been studied using cellulose, polyethylene, and wool as representative systems. Styrene, 4-vinylpyridine, and 5-methyl-2-vinylpyridine were used as monomers in a range of polar solvents. All grafting experiments were by the simultaneous method. For styrene in methanol system, cellu-lose and polyethylene exhibited Trommsdorff effects whereas wool did not. For the vinylpyridine monomers, gel effects were observed with both cellulose and wool. The results have been interpreted in terms of a charge-transfer theory for grafting.
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Dilli et al. (1972) studied this question.
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