polyester polyol can be used in high energy propellant as a binder.In this research, polyazido polyester was synthesized from direct polycondensation reaction between adipic acid and 2,2-bis(bromomethyl)-1,3-propanediol. Then, azidation of poly bromoester afford polyazidoester as an energetic polyester. polyazidoester have identified and characterized by FTIR,HNMR,GPC,DSC and elemental analysis...