火炸药学报2017，Vol.40Issue(4)：27-32,6.DOI:10.14077/j.issn.1007-7812.2017.04.005
Al@GAP复合粒子对LLM-105热分解性能的影响
Effect of Al@GAP Composite Particles on Thermal Decomposition Performance of LLM-105
摘要
Abstract
To prevent the oxidative inactivation of aluminum powders during storage, and provide references for formulation design of aluminized explosives, aluminum powders with different size were coated and modified using glycidyl azide polymer (GAP) to obtain Al@GAP composite particles.The surface morphologies of the composite particles were characterized by scanning electron microscope (SEM) and transmission election microscope (TEM).The thermal decomposition processes of (Al@GAP)/LLM-105 mixture with different mass ratio were investigated by differential scanning calorimetry (DSC).The results show that the composite particles with core-shell structure of different size of aluminum powders coated with GAP are obtained through two-step coating method.Compared with micro-Al powder before coating, the decomposition temperature of Al nanoparticles coated by GAP is obviously reduced.When the mass fraction of Al powder is more than 10%, the entropy change (ΔS≠) and enthalpy change (ΔH≠) for the mixed system of adding GAP were lower than those of Al/LLM-105.The activation energy,critical temperature of thermal explosion and the thermodynamic parameters ΔS≠ and ΔH≠ of (Al@GAP)/LLM-105 mixed system decrease with increasing the content of Al nanoparticles, when the mass fraction of Al powder is 30%, they reduced by 4kJ/mol, 3℃, 4.3J/(mol·K) and 4.2kJ/mol compared with LLM-105, respectively.关键词
物理化学/纳米Al粉/聚叠氮缩水甘油醚/GAP/耐热炸药/LLM-105/热分解Key words
physical chemistry/nano-Al powder/glycidyl azide polymer/GAP/LLM-105/thermal decomposition分类
军事科技引用本文复制引用
曾诚成,巩飞艳,刘世俊..Al@GAP复合粒子对LLM-105热分解性能的影响[J].火炸药学报,2017,40(4):27-32,6.基金项目
国家自然科学基金(No.11402238) （No.11402238）
