Radiation-induced graft polymerization of methyl methacrylate onto ultrahigh molecular weight polyethylene in the presence of a metallic salt and acid

An attempt was made to graft methyl methacrylate (MMA) onto ultrahigh molecular weight polyethylene preirradiated in air in the presence of a metallic salt and acid. The grafting yield increased with increasing monomer concentration. The maximum grafting yield was around a 60 vol % monomer concentra...

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Bibliographic Details
Published in:Journal of applied polymer science 2002-11, Vol.86 (9), p.2348-2356
Main Authors: Kwon, Oh Hyun, Nho, Young Chang
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Grafting and modifications
Physicochemistry of polymers
polyethylene (PE)
Polymers and radiations
radiation
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Summary:An attempt was made to graft methyl methacrylate (MMA) onto ultrahigh molecular weight polyethylene preirradiated in air in the presence of a metallic salt and acid. The grafting yield increased with increasing monomer concentration. The maximum grafting yield was around a 60 vol % monomer concentration. The results showed that the inclusion of FeSO4 · 7H2O and sulfuric acid in MMA grafting solutions was extremely beneficial and led to a most unusual synergistic effect in the radiation grafting, much more than with only a metallic salt. However, CuSO4 · 5H2O led to a detrimental effect. It is believed that sulfuric acid accelerates the decomposition of hydroperoxides in the presence of metallic salts such as Fe2+, inhibiting homopolymerization. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2348–2356, 2002
ISSN:0021-8995
1097-4628
DOI:10.1002/app.11266