Anionic flow polymerizations toward functional polyphosphoesters in microreactors: Polymerization and UV-modification

摘要: Abstract The polymerization of cyclic phosphates to poly(phosphoester)s, PPEs, is optimized for chip-based microreactors under continuous flow conditions. anionic ring-opening 2-isobutyoxy-2-oxo-1,3,2-dioxaphospholane (iBP) via the use two organocatalytic systems allowed polymerize nearly quantitative monomer conversion within 10 or 3 min, respectively at a reaction temperature 40 °C. Further, protocol was applied 2-butenoxy-2-oxo-1,3,2-dioxaphospholane (BP) which yields polymer that carries an alkene functionality per repeating unit. This material can be postmodified in UV-induced radical thiol–ene reaction, also shown proceed with very high efficiency UV-flow Eventually, both reactions were coupled two-stage reactor setup, showing thermally-activated UV-activated post-polymerization modification reaction. introduced setup future used produce and screen broad variety functional PPE materials various functionalities physical properties.