Radiation grafting of N-isopropylacrylamide onto poly(vinyl chloride) tubes by gamma irradiation
Grafted copolymer of poly(vinyl chloride) (PVC) with N-isopropylacrylamide (NIPAAm) was prepared by radiation-grafting method using γ-ray source. NIPAAm was graft polymerized from its aqueous solution onto PVC tubes by preirradiation method, all samples were exposed in the presence of air at room temperature to 60Co. Conditions for achieving maximum grafting yield were observed between 0.5 and 1 moldm-3 of monomer concentration, pre-irradiation dose of PVC from 5 to 110 kGy, and reaction temperature of 323 and 333 K. Characterization of the grafted copolymer was conducted by various methods: FTIR-ATR, TGA, and SEM. The temperature-responsive behavior of grafted copolymer was studied by swelling at various temperatures and pH 6.8. © Springer-Verlag 2007.
Arenas, E; Bucio, E; Burillo, G; Lopez, GP
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