سنتز چندین نرم‌کننده آزیدواستری و بررسی تأثیر آن‌ها بر کاهش مهاجرت نیتروگلیسرین از پیشرانه‌ جامد دوپایه

Use of plasticizers in the formulation of solid propellants especially double-base solid propellants is inevitable. Double base propellants are composed of nitrocellulose (NC) polymer. Plasticizers cause to increase flexibility, reduce viscosity and glass transition temperature. Energetic azido ester plasticizers are compatible with energetic binders in solid propellants. In this work, five different azido plasticizers, ethyleneglycol bisazidoacetate (EGBAA), trimethylene glycol bisazidoacetate (TMGAA), tetramethylene glycol bisazidoacetate (TMGBAA'), pentaerythritol tetrakis azidoacetate (PETKAA) and hyper branched azidoester (HB-AZ) were successfully synthesized in two steps, formation of ester and azidation, in 55-92% yields. The synthesized azidoesters were identified by FT-IR and 1H-NMR spectroscopies. Study on the different parameters showed that penta erythritol tetrakis azidoacetate and hyper-branched azidoester are more effective in reduction of the nitroglycerin migration than the other synthesized azidoesters.