Graft polymerization of methyl methacrylate onto radiation-peroxidized ultrahigh molecular weight polyethylene in the presence of metallic salt and acid

✍ Scribed by Oh Hyun Kwon; Young Chang Nho; J. H. Jin; M. J. Lee; Y. M. Lee

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 209 KB
• Volume: 72
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19990502)72:5<659::aid-app6>3.0.co;2-c

✦ Synopsis

Using a radiation peroxide grafting technique, a ultrahigh molecular weight polyethylene (UHMWPE) stored at room temperature for 10 days after irradiation in air was graft copolymerized with methyl methacrylate (MMA) in the presence of metallic salt and acid. The MMA-grafted UHMWPE samples were analyzed by measuring Fourier transform infrared spectroscopy in attenuated total reflectance (FTIR-ATR) and by electron spectroscopy for chemical analysis (ESCA). The 1,1diphenyl-2-picrylhydrzyl (DPPH) technique was utilized to evaluate the concentration of peroxide formed in the peroxidized UHMWPE samples by counting the quantity of DPPH consumed from the reaction of peroxide radicals with DPPH. It was shown that the inclusion of an FeSO 4 ⅐7H 2 O and sulfuric acid in MMA grafting solutions was extremely beneficial and led to a most unusual synergistic effect in the radiationperoxidized grafting.