| Popis: |
Nitroplasticized Estane (hereafter NP‐Estane) is the plastic binder used to hold HMX grains together in the plastic bonded explosive PBX 9501. It is a mixture of 49 wt. % Estane®5703 (BF Goodrich), 49 wt. % Nitroplasticizer (a 50/50 eutectic mixture of bis(2,2‐dinitropropyl)formal and bis(2,2 dinitropropyl)acetal), and 2 wt. % Irganox® 1010 stabilizer. NP‐Estane samples 0.1 – 2 mm thick were prepared by compression molding at 110°C. Hydrostatic compression to 2 kbar was measured at 34, 43, and 53°C. CP was measured at ambient conditions. NP‐Estane was also isentropically compressed to ≈ 35 kbar in experiment Z1251 on the Sandia Z‐Machine. Profiles of ramp waves transmitted through NP‐Estane were measured and compared with a free surface reference profile using Hayes’s “Backward” analysis and repeated forward analysis with the CTH hydrocode. The following thermodynamic quantities have been obtained; volume coefficient of thermal expansion α = 7.2(10−4)/C, CP = 1.76 J/g C, CV = 1.41 J/g C, isentropic and is... |
