Synthesis of pAMMO homopolymer by phase transfer catalytic method

3-bromomethyl-3'-methyloxetane homopolymer (pBrMMO) was synthesized using 3-bromomethyl-3'-methyloxetane (BrMMO) monomer by cationic ring opening polymerization at first, 3-azidomethyl-3'-methyloxetane homopolymer (pAMMO) energetic binder was then synthesized through a phase transfer catalytic method. The effects of temperature on polymerization and reaction time on aziding were discussed emphatically. The results show that products with high yield, controllable molecular weight and narrow molecular distribution can be obtained when polymerization is carried out at 0°C. The optimal time of aziding is 30 h. ¹H nuclear magnetic resonance spectrum ( ¹H-NMR) was used to confirm the chemical structure of pAMMO. At the same time, the product is characterized by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results show that there are two steps in the thermal decomposition of pAMMO and that the glass transition temperature of pAMMO is -44.54°C.