Toughening modification of cellulose acetate butyrate and using for CL-20-based polymer bonded explosives  

作　　者：Na Li Zhengzheng Zhang Fengqin Shang Shaohua Jin Lijie Li Changgen Feng Jiaming Gao Yu Chen 

机构地区：[1]School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Gansu Yinguang Chemical Industry Group Co.Ltd,Baiyin 730900,China [3]School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China [4]China Wuzhou Engineering Group Co.Ltd,Beijing 100053,China

出　　处：《Defence Technology(防务技术)》2025年第4期29-39,共11页Defence Technology

基　　金：supported by"the Fundamental Research Funds for the Central Universities".

摘　　要：CAB is a binder commonly utilized in CL-20-based mixed explosives.Based on the requirements of CL-20-based polymer bonded explosives in formability,safety,and detonation energy,we explored a hightoughness and low dosage CAB binder system.CAB was subjected to different toughening modifications and the effects of the modified CAB binders on the bonding and coating of CL-20 crystals,as well as the formability,safety,and mechanical properties of CL-20-based polymer bonded explosive molding powder(MP)were evaluated.The changes in glass transition temperature(Tg)and mechanical properties of the modified binders were investigated using the molecular dynamics simulation at first.A series of modified binders with different molecular weights were then synthesized and characterized by FTIR,1H NMR,^(13)C NMR and SEC.The T_(g) and cross-sectional morphologies of the binder membranes were determined by DSC and SEM.The tensile properties of the binder membranes with different molecular weights and their mixtures with the plasticizer were evaluated at different temperature.With the optimized modified binder,CL-20/CAB and CL-20/CAB-g-PCL-3 MPs with the same plasticizer ratio and Cl-20/CAB-g-PCL-3 MP with a lower plasticizer ratio and higher CL-20 content were prepared and evaluated for the bonding and coating effects,crystal form,mechanical sensitivity and specific heat capacity(C_(p))by SEM,XRD,sensitivity testing and DSC,respectively.Their compressive strengths and splitting tensile strengths were measured at different temperature using a universal testing machine.Our work has provided a high-toughness and low-dosage binder system for CL-20-based MPs and offers a novel strategy to improve the formability,safety,and energy of CL-20 based polymer bonded explosives.

关 键 词：Modified CAB binders CL-20-Based MPs FORMABILITY Safety Energy 

分 类 号：TQ560.1[化学工程—炸药化工]