caa a22 4500 463191617 CHVBK 20180406164910.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10973-006-8462-9 doi (NATIONALLICENCE)springer-10.1007/s10973-006-8462-9 Thermodynamic analysis of pure and impurity doped pentaerythritol tetranitrate crystals grown at room temperature [Elektronische Daten] [R. Pitchimani, W. Zheng, S. Simon, L. Hope-Weeks, A. Burnham, B. Weeks] Pentaerythritol tetranitrate (PETN) powders are used to initiate other explosives. During long-term storage, changes in powder properties can cause changes in the initiation performance. Changes in the morphology and surface area of aging powders are observed due to sublimation and growth of PETN crystals through coarsening mechanisms, (e.g. Ostwald ripening, sintering, etc.). In order to alleviate the sublimation of PETN crystals under service conditions, stabilization methods such as thermal cycling and doping with certain impurities during or after the crystallization of PETN have been proposed. In this report we present our work on the effect of impurities on the morphology and activation energy of the PETN crystals. The pure and impurity doped crystals of PETN were grown from supersaturated acetone solution by solvent evaporation technique at room temperature. The difference in the morphology of the impurity-doped PETN crystal compared to pure crystal was examined by optical microscopy. The changes in the activation energies and the evaporation rates are determined by thermogravimetry (TG). Our activation energies of evaporation agree with earlier reported enthalpies of vaporization. The morphology and activation energy of PETN crystals doped with Ca, Na, and Fe cations are similar to that for pure PETN crystal, whereas the Zn-ion-doped PETN crystals have different morphology and decreased activation energy. Springer Science+Business Media LLC, 2007 activation energy nationallicence evaporation rate nationallicence pure and doped PETN nationallicence TG nationallicence Pitchimani R. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut Zheng W. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut Simon S. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut Hope-Weeks L. Chemistry and Biochemistry, Texas Tech University, Box 41061, 79409-1061, Lubbock, TX, USA aut Burnham A. Chemistry and Materials Science, Lawrence Livermore National Laboratory, Box 808, 94551-0808, Livermore, CA, USA aut Weeks B. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 475-478 1388-6150 89:2<475 2007 89 10973 https://doi.org/10.1007/s10973-006-8462-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-8462-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pitchimani R. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut NATIONALLICENCE 700 1- Zheng W. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut NATIONALLICENCE 700 1- Simon S. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut NATIONALLICENCE 700 1- Hope-Weeks L. Chemistry and Biochemistry, Texas Tech University, Box 41061, 79409-1061, Lubbock, TX, USA aut NATIONALLICENCE 700 1- Burnham A. Chemistry and Materials Science, Lawrence Livermore National Laboratory, Box 808, 94551-0808, Livermore, CA, USA aut NATIONALLICENCE 700 1- Weeks B. Chemical Engineering, Texas Tech University, Box 43121, 79409-3121, Lubbock, TX, USA aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 475-478 1388-6150 89:2<475 2007 89 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer