Combination of SAXS/WAXS analysis with chip nanocalorimetry for understanding of crystallization behaviour of novel thermoplastic polyuretha

The proposed experiment is aimed at studying crystallization mechanisms of semi-crystalline multiblock polyurethanes using ultra-fast chip calorimetry. The studies will be focused on newly synthesized polyurethanes based on poly(1,4-butylene adipate) (PBA) and poly(ε-caprolactone) (PCL) as the soft block and 4,4'-diphenylmethane diisocyanate (MDI) and 1,6-hexamethylene diisocyanate (HMDI) as the hard block. We are going to perform time-resolved in-situ SAXS/WAXS experiments to address details of competitive crystallization of soft and hard blocks as a function of chemical composition and thermal history. In addition, using ultrafast heating and cooling we are going to analyze phase composition of the samples containing both PBA and PCL blocks.