Effect of inorganic salt on the thermal degradation of nitrocellulose and reaction mechanism of its mixture  

作　　者：Guo-zhong Xu Xu Gao Mi Li Zhong-xuan Han Lin Jiang 

机构地区：[1]School of Mechanical Engineering,Nanjing University of Science and Technology,China

出　　处：《Defence Technology（防务技术）》2023年第9期111-118,共8页Defence Technology

基　　金：the National Natural Science Foundation of China(NSFC,Grants No.52176114 and 52111530091);Jiangsu Funding Program for Excellent Postdoctoral Talent。

摘　　要：In this study,to better understand the reaction mechanism between inorganic salts and nitrocellulose,CaCO_(3) and Li_(2)CO_(3) were evaluated with respect to their effects on the thermal degradation of NC in nitrogen atmosphere using TG/DSC at three different heating rates(2,5,10 K/min).The numerical relationship between activation energy(E)and conversion rate was obtained by FWO and KAS method,and it was discovered that CaCO_(3) could improve the thermal stability of NC.Activation energy values were calculated by Kissinger method,and it was found that NC that contain Li2CO3had the highest activation energy while NC containing CaCO3had the lowest E value.By combining the thermal analysis data with Malek method,the most probable mechanism model of thermal degradation is obtained as Sesták-Berggren model,which expression is f(α)=α^(m)(1-α)^(n).As a result of this study,there are certain guiding principles that can be applied to the pyrolysis reaction model and to the actual production process of nitrocellulose.

关 键 词：Thermal analysis Thermal decomposition mechanism Malek method NITROCELLULOSE Inorganic salt 

分 类 号：TQ352[化学工程]