The effects of reprocessing by extrusion for up to five cycles, at both the usual (200 degrees C) and an extreme (230 degrees C) temperature, on the structure and mechanical properties of a poly(amino ether) (PAE) resin were studied. A slight darkening and viscosity increase was observed, mainly upon reprocessing at 230 degrees C. The melt flow index and solubility analysis indicated that grafting and crosslinking reactions took place, respectively, after reprocessing at 200 and 230 degrees C. The Young's modulus and the yield stress of PAE increased slightly with successive extrusion cycles. This was attributed to the viscosity-induced increase in orientation, and to a minor extent to the partially grafted/crosslinked nature of the samples. The decrease in the ductility was more noticeable in the samples reprocessed at 230 degrees C, and was attributed to the reduced ability to elongate of partially grafted and partially crosslinked structures present after reprocessing, respectively, at 200 and 230 degrees C. (c) 2006 Wiley Periodicals, Inc.