Nonisocyanate Route To 2,5-Bis(Hydroxymethyl)Furan-Based Polyurethanes Crosslinked By Reversible Diels-Alder Reactions

A series of non-isocyanate polyurethanes (NIPUs) were synthesized using 2,5-bis(hydroxymethyl)furan in combination with 1,4-butanediol through transurethanization reactions with dicarbamates. This was followed by detailed characterization to study their properties. The furan functional groups of these NIPUs made it possible to form thermally reversible crosslinks with a bismaleimide through Diels-Alder reactions, and the reversibly crosslinked NIPU materials showed great potential for the development of biobased PU products with recyclable and self-healing properties.