بررسي روش هاي سنتز آزمايشگاهي نرم كننده دي اكتيل سباسات

Laboratory-scale synthesis methods of dioctylsebacate, as aplasticizer used in solid composite propellants

نرم كننده يكي از اجزاي مهم در يك پيشرانه محسوب مي شود كه به منظور سهولت فرآيند و افزايش كرنش پيشرانه مورد استفاده قرار مي گيرد. دي اكتيل سباسات بعنوان نرم كننده خنثي, در فرمولاسيون سوخت جامد مركب بكار مي رود. ما در اين مقاله خواص فيزيكي و شيميايي و روشهاي مختلف سنتز dos را مورد ارزيابي قرار مي دهيم. در ادامه يك روش تجربي جهت تهيه اين ماده از طريق ماده اوليه يا منشا گياهي روغن كرچك بر اساس فرآيند صابوني شدن, استخراج و به دنبال آن واكنش هگزانول معرفي گرديد.

One of the important components in the solid propellants is plasticizer which is used to simplifying the process and increase flexibility of the propellant. Dioctylsebacate (DOS) as a neutral plasticizer compound is used in solid propellant formulations. In this paper, we investigate the physicochemical properties and different synthesis methods of ِDOS. In continuation an experimental method for the preparation of this compound from the raw material of plant origin Castor oil followed by saponification reaction with 2-Ethyl hexanol was introduced. Under optimal conditions, high purity product of dioctyl sebacate was obtained in 85% yields. The structure and purity of the dioctyl sebacate were approved by using analytical instruments GC, IR, NMR, CHN and Mass.