发射药钝感剂分布的萃取测定

Measurement of the Deterrent Distribution for Propellant by Extraction

为建立一种测定钝感剂在药粒中渗透深度和浓度分布的方法,在频率为45 kH z的超声波清洗器中,将单樟-11A-8/1发射药试样按规定的不同萃取时间在20℃时用二氯甲烷溶剂萃取,用气相色谱测定每次萃取后萃取液中钝感剂浓度,并计算不同时间段参与萃取的发射药体积,换算成萃取深度,绘制出了发射药深度和樟脑浓度关系曲线。结果表明,以发射药由表及里的深度与其对应樟脑含量关系曲线表示钝感剂分布的方法,更合理,但对试验条件和操作要求较高。

In order to establish the method of determining the depth in propellant and distribution of deterrent, the deterrent was extracted from camphor-deterrented single-base gun propellant with dichloromethane in the ultrasonic washer with the frequency of 45kHz, at the temperature of 20℃ and in the different extracting times. The content of camphor in extraction solution was measured by GC. The propellant volume extracted in different time interval was calculated, and the propellant depth vs. camphor content relationship was plotted through the conversion of the volume to the depth of propellant. The results show that the method describing the deterrent distribution by the relationship between the propellant depth from surface to inside and the corresponding camphor content is more reasonable but the requirement for experimental condition and operation for the method is more strict.