REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

comparison of stabilizer depletion in artificially and in naturally aged NC powder stored under the CONTINENTAL AND Mediterranean climate conditions

LJILJANA JELISAVAC

Military Technical Institute, Sector for Materials and Protection, Belgrade, ljiljanajelisavac29@gmail.com

SLAVIŠA STOJILJKOVIĆ

TRZ Đorđe Dimitrijević Đura, Kragujevac, slavisa.stojiljkovic@mod.gov.rs

SINIŠA GAĆIĆ

Technical Testing Centre, Belgrade, gacic.sinisa@gmail.com

ALEKSANDAR MILOJKOVIĆ

Military Technical Institute, Sector for Materials and Protection, Belgrade, odsekbaric@gmail.com

JELENA PETKOVIĆ-CVETKOVIĆ

Military Technical Institute, Sector for Materials and Protection, Belgrade, jpetkovic82@gmail.com

SAŠA BRZIĆ

Military Technical Institute, Sector for Materials and Protection, Belgrade, sasabrzic@gmail.com

Abstract: With the aim of improvement of domestic methodology of chemical stability control, a comparison was carried out of the stabilizer depletion according SORS 8069/91 in naturally aged of NC powder stored under the continental climate conditions in collection KB-1 (Kragujevac) and under the Mediterranean climate conditions in collection KB-2 (Sasovici) with the stabilizer depletion in the same type of NC powder artificially aged in different time-temperature test loads according actual NATO standard AOP-48 Ed. 2. So, the aim of these researches was modification of AOP-48 Ed.2 extrapolation expressions by introduction of real storage conditions of naturally aged NC powder from KB-1 under the continental and KB-2 under the Mediterranean climate, instead of AOP-48 Ed. 2 conditions, 10 years at 25°C. By analyzing the results of stabilizer depletion, possibility of applying of standard AOP-48 Ed.2 to the NC powder of domestic production stored 15 and 25 years in collections KB-1 and 15 years in KB-2 collection, was verified. Exceptions are NC powder stored 25 years in KB-2 collection because of faster dynamics of their decomposition under the Mediterranean climate conditions.

Keywords: nitrocellulose powder, chemical stability, continental climate, Mediterranean  climate, liquid chromatography.