Interpenetrating polymer networks of polycarbonate‐urethane and polybutadiene

Abstract

Abstract Interpenetrating polymer networks (IPN's), pseudo IPN's and linear blends of urethane‐containing aliphatic polycarbonate (PCU) and polybutadiene (PB) have been prepared and characterized. The simultaneous full IPN's of PCU and PB over the whole composition range (15‐85% by weight PCU) exhibit a single phase morphology even though the linear chain blends are completely immiscible, as determined by DSC and confirmed by transmission electron microscopy (TEM). However, in both pseudo IPN's of PCU and PB there appeared multiple (melting and glass) transitions in DSC measurements and phase separation was observed by TEM. © 1992 John Wiley & Sons, Inc.