Naslov
Influence of ageing on nitrocellulose thermal properties and hazard potential figures-of-merit

Autori
Rajić, Maša ; Sućeska, Muhamed

Izvornik
High temperatures. High pressures (0018-1544) 32 (2000); 171-178

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
nitrocellulose ; ageing ; differential scanning calorimetry ; activation eneregy

Sažetak
Thermal decomposition reactions in nitrocellulose, which is the basic component of homogeneous propellants, limit the safe use and safe storage time of propellants. Under certain conditions the decomposition may lead to the well-known phenomenon of self-ignition. The influence of accelerated ageing of a nitrocellulose propellant on the heat capacity, activation energy, pre-exponential factor, heat of decomposition, and hazard potential figures-of-merit is studied. The study is performed with differential scanning calorimetry and the thermal explosion theory. It is found that the activation energy, pre-exponential factor, and heat of decomposition decrease with ageing, while the heat capacity increases. That causes a decrease of the critical temperature, critical sample half-thickness, time-to-thermal runaway, and consequently an increase of thermal hazard potential.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA