title: Preparation and properties of SBS-g-DMAEMA copolymer membrane by ultraviolet radiation.
abstract: A styrene-butadiene-styrene triblock copolymer (SBS) membrane was prepared by solvent casting. Grafting of dimethyl amino ethyl methacrylate (DMAEMA) to this SBS membrane was subsequently conducted by ultraviolet radiation-induced graft copolymerization without degassing to obtain a SBS-g-DMAEMA copolymer membrane. The graft copolymer was characterized by infrared spectroscopy and scanning electron microscopy. The degree of grafting and the mechanical properties of SBS and SBS-g-DMAEMA were measured. Contact angle, water content, and protein absorption of fibrinogen and albumin experiments were also performed to evaluate the biocompatibility of SBS-g-DMAEMA graft copolymer membranes. It was found that the degree of grafting was related to the irradiation time, DMAEMA concentration, and temperature. The tensile strength of the SBS-g-DMAEMA membrane increased with an increase in the degree of grafting. By using Kaelble's equation and the contact angle data, the surface tension of SBS-g-DMAEMA was determined. It was found that with an increase in the degree of grafting, the surface tension and water content of SBS-g-DMAEMA membrane increased, whereas the contact angle decreased. The amount of absorption of albumin and fibrinogen decreased with an increase in amount of grafting. However, there was a minimum for the adsorption of proteins in the SBS-g-DMAEMA membrane.
authors.affiliation: Department of Chemical Engineering, Chang Gung College of Medicine and Technology, Taiwan, R.O.C.
authors.forename: J M
authors.initials: JM
authors.lastname: Yang
authors.forename: Y J
authors.initials: YJ
authors.lastname: Jong
authors.forename: K Y
authors.initials: KY
authors.lastname: Hsu
mesh_terms: D000042:Absorption; D000418:Albumins / Q000737:chemistry; D001672:Biocompatible Materials / Q000138:chemical synthesis* / Q000528:radiation effects; D005340:Fibrinogen / Q000737:chemistry; D007202:Indicators and Reagents; D008422:Materials Testing; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D011109:Polymethacrylic Acids / Q000138:chemical synthesis* / Q000528:radiation effects; D011137:Polystyrenes / Q000138:chemical synthesis* / Q000528:radiation effects; D013055:Spectrophotometry, Infrared; D013499:Surface Properties; D013500:Surface Tension; D013718:Tensile Strength; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry
chemical_list: D000418:Albumins; D001672:Biocompatible Materials; D007202:Indicators and Reagents; D008567:Membranes, Artificial; D011109:Polymethacrylic Acids; D011137:Polystyrenes; C107495:styrene-butadiene-styrene-dimethylaminoethylmethacrylate copolymer; D014867:Water; D005340:Fibrinogen