摘要
以聚叠氮缩水甘油醚(GAP)为含能骨架,六亚甲基二异氰酸酯(HDI)为交联剂,采用溶胶-凝胶法结合真空冷冻干燥技术,制备了CL-20质量分数分别为25%、45%、60%的GAP-HDI/CL-20纳米复合含能材料。利用SEM、Raman、FT-IR对其结构和形貌进行了表征;利用DTA对其热分解特性进行了研究;根据不同升温速率下的DTA曲线测试结果对所制备样品的热分解动力学参数、热力学参数和热爆炸临界温度进行了计算。结果表明,CL-20粒子成功负载到了GAP-HDI凝胶骨架中,形貌由棱柱状转变为类球形,且粒径为纳米级;GAP-HDI/CL-20纳米复合含能材料的初始热分解峰温较原料CL-20均有所提前;CL-20质量分数分别为25%、45%、60%的GAP-HDI/CL-20纳米复合含能材料在高温热分解阶段表观活化能分别为224.9、228.9、231.7kJ/mol,与原料CL-20相比,分别降低了28.4、24.4和21.6kJ/mol,说明纳米复合粒子的热分解活性得以提高;GAP-HDI/L-20纳米复合含能材料的热力学参数和热爆炸临界温度均随着CL-20含量的增加而增大。
With glycidyl azide polymer（GAP）as energetic gel matrix and hexamethylene diisocyanate（HDI）as cross-linking agent,GAP-HDI/CL-20 nano-composite energetic materials containing 25%,45% and 60% CL-20 in mass ratio were prepared by the sol-gel method and vacuum freezing-drying technology.Their structure and morphology were characterized by SEM,Raman and FT-IR,and the thermal decomposition characteristics were studied by DTA.According to the test results of DTA curves at different heating rates,the thermal decomposition kinetic parameters,thermodynamic parameters and critical temperature of thermal explosion of the prepared samples were calculated.The results show that CL-20 particles were successfully loaded into GAP-HDI gel skeleton.The morphologies of CL-20 particles are changed from prism to spheroid and the particle sizes are nano-scale.The initial thermal decomposition temperature of GAP-HDI/CL-20 is earlier than that of raw material CL-20.The apparent activation energies of GAP-HDI/CL-20 nano-composite energetic materials with CL-20 mass fraction of 25%,45%and60% are 224.9,228.9 and 231.7 kJ/mol,respectively,which are decreased by 28.4,24.4 and 21.6 kJ/mol compared with that of raw material CL-20,indicating that the thermal decomposition activity of GAP-HDI/CL-20 is improved,the thermodynamic parameters and the critical temperature of thermal explosion increase with the increase of CL-20 content.
作者
陈腾
李强
郭双峰
郝嘎子
肖磊
柯香
高寒
赵刘明
李铎
姜炜
CHEN Teng;LI Qiang;GUO Shuang-feng;HAO Ga-zi;XIAO Lei;KE Xiang;GAO Han;ZHAO Liu-ming;LI Duo;JIANG Wei(National Special Superfine Powder Engineering Research Center of China,School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Shanxi Northern Xing′an ChemicalIndustry Co.,Ltd.,Taiyuan 030008,China;Xi′an Modern Chemistry Research Institution,Xi′an 710065,China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2018年第3期243-249,共7页
Chinese Journal of Explosives & Propellants
基金
北化集团青年科技创新专项项目(QKCZ201615)
