SEARCH Articles Figures Tables Boron Alkyls and Metal Alkyl Initiators of Free-Radical Polymerizations Boron and metal alkyl initiators of free-radical polymerizations Boron catalysts ring-opening polymerization Boron nitride fibers polymeric precursors Boron trifluoride etherate polymerization Boron trifluoride polymerization Lewis acidic polymeric boronates Polymeric Boron Compounds Polymeric boron-nitrogen compounds Polymeric boron-nitrogen compounds formation Polymeric boronic acid Polymeric precursors boron nitride Polymerization boron-containing monomer