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Surface modification of poly styrene-b-ethylene-co-butylene-b-styrene elastomer via photo-initiated graft polymerization of poly ethylene glycol



Surface modification of poly styrene-b-ethylene-co-butylene-b-styrene elastomer via photo-initiated graft polymerization of poly ethylene glycol







Poly (styrene-b-(ethylene-co-butylene)-b-styrene) copolymer (SEBS) biomedical elastomer was covalently grafted with poly (ethylene glycol) methyl ether methacrylate (PEGMA) via a photo-initiated graft polymerization technique. The surface graft polymerization of SEBS with PEGMA was verified by ATR-FTIR and XPS. Effect of graft polymerization parameters, i.e., monomer concentration, UV irradiation time and initiator concentration on the grafting density was investigated. Comparing with the virgin SEBS film, the PEGMA-modified SEBS film presented an enhanced wettability and a larger surface energy. Besides, the surface grafting of PEGMA imparted excellent anti-platelet adhesion and anti-protein adsorption to the SEBS surface.

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