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Thermal response of model segmented copolyurethane elastomers and the correlation with the physical structure (part 1)

von Dr. Cristina Prisacariu

Thermal behaviour has been studied for well characterized model thermoplastic polyurethane elastomers (TPUs), in order to shed light on the physical processes involved in such materials under the influence of temperature. Particular aspects were followed on how the TPUs thermal responses vary with composition, with the aim of ­improving understanding of the relationship between molecular/supramolecular architecture at the nm-scale and thermal behaviour in such systems. The role of the hard segment structure on the TPUs was investigated.

Two hard segments were compared, based on the model rigid 4,4’-methylene bis(phenyl isocyanate) (MDI) non-crystallizing and on the flexible 4,4’-dibenzyl diisocyanate (DBDI) crystallizing in the presence of suitable chain extenders. The present study combines these and other selected aspects from reviewed literature on recent developments on the thermal ­response of model TPUs and the correlation with their physical structure.