Effect and mechanism of reductive polyaniline on the stability of nitrocellulose  

作　　者：Wenjiang Li Binbin Wang Huimin Chen Aoao Lu Chenguang Li Qiang Li Fengqiang Nan Ping Du 

机构地区：[1]School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [2]Key Laboratory of Special Energy Materials,Ministry of Education,Nanjing 210094,China

出　　处：《Defence Technology（防务技术）》2024年第8期217-225,共9页Defence Technology

基　　金：supported by the National Natural Science Foundation of China(Grant No.22305123)。

摘　　要：The search for new green and efficient stabilizers is of great importance for the stabilization of nitrocellulose(NC). This is due to the shortcomings of traditional stabilizers, such as high toxicity. In this study, reduced polyaniline(r-PANI), which has a similar functional structure to diphenylamine(DPA) but is non-toxic, was prepared from PANI based on the action with N_(2)H_(4) and NH_(3)-H_(2)O, and used for the first time as a potential stabilizer for NC. XPS, FTIR, Raman, and SEM were used to characterize the reduced chemical structure and surface morphology of r-PANI. In addition, the effect of r-PANI on the stabilization of NC was characterized using DSC, VST, isothermal TG, and MMC. Thermal weight loss was reduced by 83% and 68% and gas pressure release by 75% and 49% compared to pure NC and NC&3%DPA, respectively.FTIR and XPS were used to characterize the structural changes of r-PANI before and after reaction with NO_(2). The 1535 cm^(-1) and 1341 cm^(-1) of the FTIR and the 404.98 eV and 406.05 eV of the XPS showed that the -NO_(2) was generated by the absorption of NO_(2). Furthermore, the quantum chemical calculation showed that NO_(2) was directly immobilized on r-PANI by forming -NO_(2) in the neighboring position of the benzene ring.

关 键 词：NITROCELLULOSE Green stabilizer POLYANILINE Mechanism of stability 

分 类 号：TQ314.245[化学工程—高聚物工业]