Pregled bibliografske jedinice broj: 147651
Changes of dynamic mechanic properties of double based rocket propellant during artificial ageing
Changes of dynamic mechanic properties of double based rocket propellant during artificial ageing // Proceedings of the VII. Seminar / Jiri Vagenkneeht (ur.).
Pardubice: University of Pardubice, 2004. str. 570-583 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 147651 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Changes of dynamic mechanic properties of double based rocket propellant during artificial ageing
Autori
Matečić Mušanić, Sanja ; Sućeska, Muhamed ; Rajić Linarić, Maša ; Sanko, Bakija ; Čuljak, Ružica
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Proceedings of the VII. Seminar
/ Jiri Vagenkneeht - Pardubice : University of Pardubice, 2004, 570-583
Skup
New Trends in Research of Energetic Materials
Mjesto i datum
Pardubice, Češka Republika, 20.04.2004. - 22.04.2004
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
double base rocket propellant; dynamic mechanical properties; storage modulus; loss modulus; tangents delta; glass transition; ageing
Sažetak
Double based rocket propellants are subjected to a chemical ageing, as well as ageing due to physical and physical-chemical processes (migration of low molecular constituents: plasticizers, blasting oil, burning catalysts, degradation of molar mass, etc.). The ageing has significant influence on their relevant properties, including mechanical properties such as tensile strength, storage modulus, loss modulus, tan delta, and temperature of glass transition, etc. During use these changes can result in dangerous failures, such as rocket motor explosion. Therefore, it is necessary that after some time, temperature, and stress conditions, relevant properties of the propellants are still in the range of acceptable tolerance. In this work we have studied changes of dynamic mechanic properties (loss modulus, storage modulus, tan delta, etc.) with the artificial ageing at higher temperature (90°C). The results obtained have shown that dynamic mechanical parameters change significantly after ~40 days of ageing. It was found out that the most sensitive parameters on the ageing process are: storage modulus at the room temperature, glass transition temperature, width of peak on loss modulus curve in the glass transition region, and tan δ at the glass transition region.
Izvorni jezik
Engleski
Znanstvena područja
Kemijsko inženjerstvo
