Thermal stability and kinetic of decomposition of nitrated HTPB

• Published in: Journal of hazardous materials Vol. 172; no. 2; pp. 1659 - 1664
• Main Authors: Wang, Qingfa, Wang, Li, Zhang, Xiangwen, Mi, Zhentao
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 30.12.2009; Elsevier
• Subjects: Applied sciences; Calorimetry, Differential Scanning; DSC; Exact sciences and technology; Explosive Agents; Hot Temperature; Kinetics; NHTPB; Nitro Compounds - chemistry; Non-isothermal kinetic; Pollution; Pressure; Thermal decomposition; Thermodynamics; Non-isothermal kinetic; NHTPB; Thermal decomposition; DSC; Differential scanning calorimetry; Calorimeter; Heating rate; Binders; Composite material; Thermal stability; First order; Thermodynamic parameter; Solid propellant; Kinetics; Plastic bonded explosive; Kinetic parameter; Critical temperature
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2009.08.040

Nitrated HTPB (NHTPB) is a potential energetic binder to replace the conventional inert binder, HTPB, for the composite solid propellants and plastic bonded explosives (PBXs). The thermal stability of the NHTPB sample with 10% double bonds converted to dinitrate ester group (10% NHTPB) was evaluated by high-pressure differential scanning calorimeter (PDSC) measurement. The influences of pressure (0.1, 2.5 and 5.0 MPa) and the heating rate (4, 6, 8 and 10 °C min −1) on the DSC behavior of the 10% NHTPB sample were investigated. The decomposition temperature of this compound decreased with the increase of pressure, meanwhile, increased as the heating rate increasing. The thermal decomposition at 150–250 °C followed a first-order law. The kinetic parameters and thermodynamic parameters for the 10% NHTPB sample at 150–250 °C under ambient pressure were obtained from the DSC data by non-isothermal methods proposed by ASTM E698 and Flynn–Wall–Ozawa. The critical temperature for this compound was estimated at about 154 °C.