Microwave synthesis of 3, 3'-bisazidomethyl oxetane-3-azidomethyl-3'-methyl oxetane random copolymer

3, 3'-Bisbromomethyl oxetane-3-bromomethyl-3'-methyl oxetane (BBMO-BrMMO) random copolymer was synthesized by cationic ring opening polymerization using 1, 4-butanediol/boron trifluoride etherate initiator system. 3, 3'-Bisazidomethyl oxetane-3-azidomethyl-3'-methyl oxetane (BAMO-AMMO) random copolymer was then synthesized through microwave synthesis. Azidation kinetic analysis was carried out at the same time. The results indicate that composition and micro-sequential distribution of BBMO-BrMMO random copolymers are controllable through regulating molar feed ratio of monomers. Reaction rate of azidation is controlled by the amount of tetrabutyl ammonium bromide (TBAB), k=48.85 L/(mol • h) (TBAB=1%); k=51.95 L/ (mol • h) (TBAB=5%); k=62.72 L/(mol • h) (TBAB=10%). Reaction time of azidation is shortened by microwave synthesis, the security of the reaction process is improved accordingly, and microwave synthesis does not change the chain structure of copolymers.