The role of hydroperoxides as a precursor in the radiation-induced graft polymerization of methyl methacrylate to ultra-high molecular weight polyethylene

摘要: Abstract A graft polymerization of methyl methacrylate (MMA) to ultra-high molecular weight polyethylene (UHMWPE) with Co-60 γ-ray irradiation in air at room temperature has been carried out. The grafting yields were measured as a function the storage time (elapsed from end start grafting), and it was found that reach maximum values around several days since irradiation. In order clarify precursor polymerization, changes radical carbonyl groups ESR microscopic FT-IR, respectively. From similarities between depth profiles hydroperoxide formation products, concluded hydroperoxides can be main precursors radiation-induced MMA UHMWPE under given conditions.