A novel strategy to polyurethanes with improved mechanical properties by photoactivation of amidocoumarin moieties.

ABSTRACT: An attractive strategy involving photodimerization of a novel amidocoumarin moiety is presented to prepare polyurethane coatings with excellent mechanical properties. Two families of polyurethanes containing these chromophore units into soft or hard segments were easily synthesized by inserting a small fraction of amidocoumarin-diol (5 wt% or 10 wt%). A systematic study has been carried out comparing hard segment, chromophore content and the influence of this amidocoumarin unit within the hard or soft segment. For all synthetized polymers, mechanical properties of the coatings have been evaluated before and after an excitation of the coumarin units with UV light. The results show that the insertion of coumarin into the hard segment leads to a considerable improvement of the mechanical prop

SUBMITTER: Navarro R 

PROVIDER: S-EPMC9056287 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature