مطالعه پایداری شیمیایی و پارامترهای سینتیکی ترکیبات و فرمولاسیون های پیروتکنیک حاوی فسفر قرمز

Red phosphorus (RP) is one of the most important allotropes of phosphorus with extensive military and civil applications in pyrotechnics. During its maintenance, decomposition of RP generates phosphorus acid family and poisonous phosphine gas. One of the conventional method for evaluation of chemical stability of red phosphorus munitions is evolved phosphine measurement. In the present study, four samples of microencapsulated red phosphorus with ethyl cellulose, nitrocellulose and their combination with hydroxyl-terminated poly-butadiene (HTPB) were prepared. Then all samples were stability characterized with water absorption (as an effective parameter for chemical stability of red phosphorus) and estimate evolved phosphine and phosphorus acid family acidimetrically as ml of NaOH consumption. Ethyl cellulose-HTPB coated sample exhibited best water absorption and phosphine generation during chemical stability test compared to other samples. Then the aging process of this sample was evaluated and compared in a month with blank red phosphorus. Finally two pyrotechnic formulations containing blank red phosphorus and coated red phosphorus have been quality contorol  evaluated for phosphine release and thermal analysis(for calculation kintic parameters according to Kissinger and Starink equations).