Mechanochemical effects in degradation of nitrocellulose and nitrocellulose-diphenylamine mixture

作者：Vyazovkin S^*; Dranca I; Lang AJ

来源：Thermochimica Acta, 2005, 437(1-2): 75-81.

DOI：10.1016/j.tca.2005.06.021

• degradation
• energetic materials
• fracture
• dynamic mechanical analysis
• mass spectrometry
• mechanochemistry
• nitrocellulose
• propellant

Dynamic mechanical analysis is combined with mass spectrometry to study nitrocellulose and nitrocellulose-diphenylamine films under oscillating strain. At a constant temperature (150-160 degrees C) and frequency 400-600 Hz nitrocellulose fractures demonstrating a modulus drop and release of products with m/z = 30 and 44. At a linear heating (2 degrees C min(-1)) and frequency 10-50 Hz similar products are released in two steps, the second of which demonstrates a modulus drop and a temperature increase indicating ignition. Addition of 2 mass% of diphenylamine markedly enhances the resistance of nitrocellulose to mechanochemical degradation. At 160 degrees C, the process has been initiated only after significant exposure times to high frequencies: 67 min at 200 Hz, 36 min at 300 Hz and 29 min at 400 Hz.

• 出版日期2005-10-15