EFFECTS OF A POLYMERIC ADDITIVE IN A BIOMEDICAL POLY(ETHER URETHANEUREA)

The biomedical poly (ether urethaneurea) Biomer has previously been sh own to contain a standard antioxidant and a polymethacrylate additive with surface active properties. In the present communication, the latt er additive has been shown to influence the morphology, mechanical pro perties, and surface chemistry of a poly(ether urethaneurea) with a co mposition similar to Biomer. It was shown that the in vitro blood comp atibility of the poly (ether urethaneurea) was improved and that adsor ption of fibrinogen from blood plasma decreased significantly due to t he presence of the surface active polymethacrylate additive. (C) 1993 John Wiley & Sons, Inc.