斯蒂芬酸铅的微纳米化及性能研究

采用微乳液法合成出平均粒度在10~20μm之间的斯蒂芬酸铅(W-LTNR),在合成LTNR过程中,加入适量研磨珠制备出平均粒度在5μm以下的细化LTNR样品(Y-LTNR)。通过电子显微镜和激光粒度测试仪对细化前LTNR、W-LTNR及Y-LTNR样品晶体形貌和粒度进行分析,采用差示扫描量热分析仪(DSC)和真空安定性测试仪,测试了3种LTNR样品的热性能和5s爆发点。结果表明,3种LTNR样品的DSC分解峰温度基本保持一致;相比细化前LTNR,高能冷却研磨后样品(Y-LTNR)活化能有所提高,5s爆发点温度略有提高,热感度有所降低。

Study on Micro-nano Refinement and Performance of LTNR

The ultrafine LTNR(W-LTNR) with average particle size between 10 to 20μm was prepared by the method of microemulsion. In the process of synthesizing, grinding beads were added, and the sample Y-LTNR was gotten. The electronic microscope and laser particle size tester were used to characterize the morphology and size distribution of LTNR before ultrafine, W-LTNR and Y-LTNR. Thermal stability of three kinds of LTNR sample were analyzed by differential scanning calorimetry(DSC) and dynamic vacuum stability test. The 5 s delay explosion temperatures of three samples were also tested. The results show that the peak temperature of DSC decomposition is basically same among the three LTNR samples. For the Y-LTNR samples which is processed after high energy cooling and grinding, the activation energy is increased, the temperature of 5 s delay explosion is slightly enhanced, and the thermal sensitivity is reduced.