Fast and Switchable Ring-Opening Polymerization of Biorenewable Omega-Substituted Lactones towards Sustainable Copolymers with Facile Control over Monomer Sequence

Highly active catalysts for the ring-opening polymerization (ROP) of biorenewable monomers, especially lactones, are essential for sustainable polymers. The (thio)urea/base catalyst systems was found to be active for unsubstituted lactones....