Effect of aromatic diamine extenders on the morphology and property of RIM polyurethane-urea

An aromatic diamine, CMOMDA, was synthesized and used as a chain extender for reaction injection molding (RIM) polyurethane–urea. The morphology and properties of CMOMDA‐, DETDA‐, and MDA‐extended poly(ether–urethane–urea)s (PEUUs) were measured by IR, DSC, DMS, SEM, and tensile testing apparatus. Well‐matched values of C h and X ut,b / C h were necessary for aromatic diamine‐extended PEUU. DSC and SEM showed that the aggregation state of hard segments might undergo some changes with increasing hard‐segment content. © 1994 John Wiley & Sons, Inc.