Simulated body fluid (SBF) with almost equal ion concentrations and pH to those of the human blood plasma, was prepared according to . This involved dissolving reagents including NaCl, NaHCO 3 , KCl, K 2 HPO 4 •3H 2 O, MgCl 2 •6H 2 O, 1M-HCl, CaCl 2 , Na 2 SO 4 , and (CH 2 OH) 3 CNH 2 in ionexchanged and distilled water at 36.5°C and adjusting the pH to 7.4 using 1N-HCl solution. The SBF was stored at 5°C until it was used the next day. The copolymer films were prepared with a thickness of 0.5 mm and dimensions of 15x15 mm (5 samples for each copolymer). To mimic physiological conditions, the samples were immersed in SBF and kept in dynamic conditions using an orbital shaker at 37°C. The SBF was replaced with fresh solution once per week, and after 4 weeks the samples were collected and rinsed with distilled water and dried in a vacuum oven for 24 hours. SEM images of the surfaces of the samples were obtained using a UHR FE-SEM Hitachi SU8020 equipped with energy dispersive X-ray spectroscopy (EDX). An ultra-thin coating (20 nm) of chromium (Cr) was applied to the surfaces of the samples using Quorum Q150T sputtering to provide electrical conductivity for the SEM.