TY - DATA T1 - Microwave-assisted synthesis of isosorbide-derived diols for the preparation of thermally stable thermoplastic polyurethane PY - 2017/11/13 AU - Nejib Kasmi AU - Martina Roso AU - Nadia Hammami AU - Mustapha Majdoub AU - Carlo Boaretti AU - Paolo Sgarbossa AU - Chiara Vianello AU - Giuseppe Maschio AU - Michele Modesti AU - Alessandra Lorenzetti UR - https://tandf.figshare.com/articles/journal_contribution/Microwave-assisted_synthesis_of_isosorbide-derived_diols_for_the_preparation_of_thermally_stable_thermoplastic_polyurethane/5594194 DO - 10.6084/m9.figshare.5594194 L4 - https://ndownloader.figshare.com/files/9731710 KW - Isosorbide KW - sulphur KW - microwave assisted synthesis KW - polyurethane KW - thermal stability N2 - In order to prepare thermally stable isosorbide-derived thermoplastic polyurethane, the synthesis of two new chiral exo–exo configured diols, prepared from isosorbide, and two types of diphenols (bisphenol A and thiodiphenol) was described. The synthesis conditions were optimized under conventional heating and microwave irradiations. To prove their suitability in polymerization, these monomers were successfully polymerized using 4,4′-diphenylmethane diisocyanate (MDI) and hexamethylene diisocyanate (HDI). Both monomers and polymers have been studied by NMR, FT-IR, TGA, DSC; intrinsic viscosity of polymers has also been determined. The results showed the effectiveness of the synthetic strategy proposed; moreover, a dramatic reduction of the reaction time and an important improvement of the monomers yield using microwave irradiation have been demonstrated. The monomers, as well as the polymers, showed excellent thermal stability both in air and nitrogen. It was also shown that the introduction of sulphur in the polyurethane backbone was effective in delaying the onset of degradation as well as the degradation rate. ER -