Porous segmented polyurethanes—possible candidates as biomaterials

A systematic series of chemically well defined, segmented polyurethane‐polyether copolymers and their mixtures are shown to develop predictable and controlled morphologies. Changes in compositions and casting histories allow the preparation of polymer films with various types of morphological structures including uniform nonporous, coalesced spherulitic nonporous, spherulitic porous, and “Swiss cheese‐like” structures with uniform (but alterable) pore sizes. The desirability of producing biocompatible materials with controlled morphologies provides incentive for further investigation of these and similar urethane copolymers.