Abstract
A stable free radical (2,2,6,6-tetramethylpiperidine-1-oxyl, TEMPO) polymerization technique was applied to a graft polymerization of styrene (ST) to polyethylene (PE). PE peroxides produced by γ-irradiation in air were used as macromolecular initiators for grafting. Grafted polystyrene (PSgraft) was cleaved from the PE main chains by reaction with hydroiodic acid. The molecular weight (Mn) and polydispersity of the PSgraft and free (nongrafted) polystyrene (PSfree) were determined by GPC. These PS’s have almost the same Mn in low conversion and narrow polydispersity. Nitroxide-terminated PS grafted to the PE was chain extended by sequential activation of the dormant chain ends in the presence of additional ST monomer. The grafting (weight) ratio of PS to PE was increased linearly with increasing Mn of PSgraft.
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Yamamoto, K., Nakazono, M., Miwa, Y. et al. “Living” Radical Graft Polymerization of Styrene to Polyethylene with 2,2,6,6-tetramethylpiperidine-1-oxyl. Polym J 33, 862–867 (2001). https://doi.org/10.1295/polymj.33.862
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DOI: https://doi.org/10.1295/polymj.33.862