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Ultrathin films of poly(dimethylsiloxane)‐polyamide copolymers (PAS) with different silicone contents were prepared by the methods of water casting and spin coating. The surface properties of the films were investigated in detail using contact angle measurements and X‐ray photoelectron spectroscopy (XPS). The water‐cast films were thin enough to be applicable as laminate films for an artificial lung or an air‐separator for oxygen‐enrichted air. Uniform and ultrathin films were obtained by the spin coating method. XPS and contact angle measurements suggested that poly(dimethylsiloxane) segments were condensed at the outermost surface of spin‐coated PAS films. XPS measurements also revealed that the surface properties of PAS were affected by the molding method, especially the solvent evaporation conditions.
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Kishida et al. (1994) studied this question.
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