| 摘要 |
<p>A blood-compatible polymer solid at 37 DEG C comprises a block polymer including a sequence of block segments represented by the formula (A) (B) (C), in which A is a poly(alkylsiloxane), B is a hard block polymer segment with a crystalline melting point above 37 DEG C or a glass transition temperature above 37 DEG C (such as a polyurethane), and C is a hydrophilic polymer consisting of polyethylene oxide or polyethylene oxide-copolypropylene oxide. The block polymer may be blended with at least 95% of a blood-incompatible base polymer, i.e. a good structural polymer such as a polyurethane, to lower the surface free energy and produce a blood-compatible polymer mixture suitable for use as a blood-contacting surface of a biomedical device.</p> |
