5. Conclusions
1. Polymeric alloys with improved mechanical properties
are obtained by reactive melt blending of PBT with
thermoplastic PU.
2. DMA and spectroscopic evidence support the view that
during melt blending ester±amide interchange reactions
take place, forming a PBT±PU copolymer. The latter
promotes good component dispersion and interphase
bonding via intermolecular reactions.