scholarly journals Differential scanning calorimetry and vacuum stability test as methods to determine explosives compatibility

2020 ◽  
Vol 70 (3) ◽  
pp. 35-40
Author(s):  
Bojana Fidanovski ◽  
Danica Simić ◽  
Mirjana Dimić ◽  
Slavica Terzić
Keyword(s):  
Differential Scanning Calorimetry ◽  
Polymer Materials ◽  
Stability Test ◽  
Thermal Method ◽  
Scanning Calorimetry ◽  
Vacuum Stability ◽  
Polyamide 12 ◽  
Explosive Materials ◽  
Vacuum Stability Test ◽  
Instrumental Methods

During production, storage and manipulation of explosive materials it is important to be able to evaluate potential risks when they come in contact with each other or with other non explosives materials. For this reason various analytical and instrumental methods are being developed and implemented to study the chemical compatibility of explosives with other materials. In this research a possibility has been examined of application of thermal method-Differential Scanning Calorimetry (DSC) and Vacuum Stability Test (VST) as methods to determine the compatibility of often used explosive materials: Octogen (HMX), Pentrite (PETN) and Ammonium Perchlorate (AP) with also often used polymer materials: polyamide 12 (PA 12), Hydroxyl Terminated Polybutadiene (HTPB), fluoroelastomer (Viton A). Standard STANAG4147 was used as criteria to estimate the compatibility between the observed materials.

Investigation into the Differences Thermal Properties of SLS Polymer Powder Materials Using Differential Scanning Calorimetry (DSC)

2014 ◽  
Vol 548-549 ◽  
pp. 53-56
Author(s):  
Yusoff Way ◽  
Hadi Puwanto ◽  
M. Aichouni ◽  
Farizahani
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Polymer Materials ◽  
Powder Materials ◽  
Sintering Process ◽  
Scanning Calorimetry ◽  
Polyamide 12 ◽  
Materials Used

In order to produce good functional Laser Sintering (LS) parts, it is important that the powder on the part bed surface receives a sufficient amount of power energy through the laser sintering process. The reason is that sufficient energy density is produced when the energy input increases and is applied to the part bed surface, which causes a higher temperature, and thus better melt flow. The objective of this research is to investigate the thermal properties of polymer materials used in Selective Laser Sintering (SLS) processes. In this experiment, there were five different thermoplastics powders known as polyamide 12 (PA2200), Glass Fill Polyamide (GF3200), Alumide, Duraflex and CastForm were tested using Differential Scanning Calorimetry (DSC). This outcome of this research would assist the SLS users to improve the sintering process and quality of the part surface finish.

scholarly journals STRUCTURAL AND MECHANICAL CHARACTERIZATION OF DEFORMED POLYMER USING CONFOCAL RAMAN MICROSCOPY AND DSC

2016 ◽  
Vol 3 ◽  
pp. 47-50
Author(s):  
Birgit Neitzel ◽  
Florian Aschermayer ◽  
Milan Kracalik ◽  
Sabine Hild
Keyword(s):  
Differential Scanning Calorimetry ◽  
Raman Spectroscopy ◽  
Mechanical Characterization ◽  
Polymer Chains ◽  
Polymer Materials ◽  
Confocal Raman Microscopy ◽  
Micro Structure ◽  
Scanning Calorimetry ◽  
Confocal Raman

Polymers have various interesting properties, which depend largely on their inner structure. One way to influence the macroscopic behaviour is the deformation of the polymer chains, which effects the change in microstructure. For analyzing the microstructure of non-deformed and deformed polymer materials, Raman spectroscopy as well as differential scanning calorimetry (DSC) were used. In the present study we compare the results for crystallinity measurements of deformed polymers using both methods in order to characterize the differences in micro-structure due to deformation. The study is ongoing, and we present the results of the first tests.

Dynamic vacuum stability test method and investigation on vacuum thermal decomposition of HMX and CL-20

2012 ◽  
Vol 537 ◽  
pp. 13-19 ◽  
Author(s):  
Rui Liu ◽  
Zunning Zhou ◽  
Yanli Yin ◽  
Li Yang ◽  
Tonglai Zhang
Keyword(s):  
Thermal Decomposition ◽  
Test Method ◽  
Stability Test ◽  
Vacuum Stability ◽  
Dynamic Vacuum ◽  
Vacuum Stability Test

scholarly journals Research on thermal decomposition of trinitrophloroglucinol salts by DSC, TG and DVST

2013 ◽  
Vol 11 (5) ◽  
pp. 774-781 ◽  
Author(s):  
Rui Liu ◽  
Tonglai Zhang ◽  
Li Yang ◽  
Zunning Zhou ◽  
Xiaochun Hu
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Scanning Calorimetry ◽  
Vacuum Stability ◽  
Stability Order ◽  
Apparent Activation Energies ◽  
Vacuum Stability Test ◽  
Pressure Changes ◽  
Maximum Mass Loss ◽  
Dsc Curves

AbstractThe thermal decomposition of the four nitrogen-rich salts of ammonia (NH4), aminoguanidine (AG), carbohydrazide (CHZ) and 5-aminotetrazo (ATZ) based on trinitrophloroglucinol (H3TNPG) was investigated using the differential scanning calorimetry (DSC), thermogravity (TG), and dynamic vacuum stability test (DVST). DSC and TG methods research the complete decomposition, while DVST method researches the very early reaction stage. The peak temperatures of DSC curves are consistent with the temperatures of maximum mass loss rates of TG curves. The apparent activation energies of these H3TNPG-based salts obtained by DSC and DVST have the same regularity, i.e., (ATZ)(H2TNPG)·2H2O 2O 4(H2TNPG) 2TNPG). The thermal stability order is (ATZ)(H2TNPG)·2H2O 2O 2TNPG) 4(H2TNPG), which was evaluated by DVST according to the evolved gas amount of thermal decomposition. DVST can monitor the real-time temperature and pressure changes caused by thermal decomposition, dehydration, phase transition and secondary reaction, and also evaluate the thermal stability and kinetics.

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