Experimental Investigation of Two-Dimensional Shock Initiation Process of Cast Composition B

A two-streak high-speed photography measuring system is designed, which can successfully record the reactive shock front and the reaction profile within the run distance of shock initiation under two-dimensional shock initiation. The strong reaction delay time and the shape of reaction shock front are determined in the cast composition B (RDX/TNT/60/40). A low level reaction zone has been found and analyzed.     

羧甲基玉米淀粉合成工艺的改进

以玉米淀粉为原料，采用改进的合成方法，即对反应物料进行碱前处理，并加入促进剂，制备了羧甲基玉米淀粉钠。以取代度为目标，研究了氢氧化钠、反应时间、反应温度等因素对反应的影响，以及取代度与产品物性的关系，确定了优化的工艺参数为：氢氧化钠：一氯乙酸=2：1(摩尔比)，反应温度60℃，反应时间120min，淀粉15g，促进剂22g。