Abstract
The interaction of low molecular weight models of poly(ether)urethanes (PEUs), used in various biomedical applications, with metal ions was studied. Interaction of calcium ion and silver ion with urethane and urea models of the hard segment were observed using protein nuclear magnetic resonance (1H NHR). Soft segment models, poly(tetramethylene ether)glycols and poly(propylene ether)glycols, were shown by atomic emission spectroscopy (AES) to extract metal ions, quantitatively and selectively, from aqueous solutions. Among the polyethers, those having a molecular weight of 1000 showed an enhanced capacity for extracting metal ions. These models studies support other data which indicate that PEUs extract metal ions from aqueous media, over a wide range of pHs, including physiologic pH, and the hypothesis that the ionic interaction or complexation and the mineralization of PEU may be interrelated.
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