Synthesis and characterization of BAMO-r-GAP copolymer

3, 3-bis(bromomethyl) oxetane-r-glycidyl azide copolymer was synthesized by cationic copolymerization, using butane-1, 4-diol and boron trifluoride etherate as the initiator and catalyst, followed by the azidition of the halogenated copolymer. n(BF ₃-dimethyl ether complex)/n(1, 4-butylene glycol) (n(BTFE)/n(BDO))=1:2, 15°C was chosen as better experimental condition for the cationic copolymerization. FT-IR, ¹³C-NMR, GPC and DSC were used to characterize the copolymer. The results show that M̄ _n of the copolymer is 1750 and the molecular weight distribution is 1.12. The content of the oligomers is about 22 percents by weight. DSC shows that T _g of the product is -57.68°C, and the crystallization of 3, 3-bis(azidomethyl) oxetane (PBAMO) was disturbed by the addition of glycidyl azide polymer(GAP).