Author: Thomas C. Castorina
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
Book Description
Water adsorption isotherms were measured for the polymorphs of octahydro-1,3,5,7-tetranitro-s-tetrazine (HMX). Water is found to sorb into the crystal structure in the order, gamma-HMX> alpha-HMX, and not at all into beta-HMX. The thermodynamics of water interaction with the surface of beta-HMX was studied as a function of grinding action. Grinding reduces the free surface energy of beta-HMX from 25 to 5 ergs/sq cm, and increases the hydrophobic character of the surface by a factor of 12. The calculated thermodynamic functions support the concept of adsorption of water in clusters on both ground and unground beta-HMX surfaces. The integral heat of water adsorption increases with increasing hydrophobicity. This is attributed to unhindered dipole interaction of water with the more isolated active sites of like charges. Accordingly, water is shown to become less entropic as the hydrophobicity is increased. (Author).
The Water Adsorption Properties of the Polymorphs of Hmx: the Thermodynamics of Water Interaction with Ground and Unground Beta-hmx
Author: Thomas C. Castorina
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
Book Description
Water adsorption isotherms were measured for the polymorphs of octahydro-1,3,5,7-tetranitro-s-tetrazine (HMX). Water is found to sorb into the crystal structure in the order, gamma-HMX> alpha-HMX, and not at all into beta-HMX. The thermodynamics of water interaction with the surface of beta-HMX was studied as a function of grinding action. Grinding reduces the free surface energy of beta-HMX from 25 to 5 ergs/sq cm, and increases the hydrophobic character of the surface by a factor of 12. The calculated thermodynamic functions support the concept of adsorption of water in clusters on both ground and unground beta-HMX surfaces. The integral heat of water adsorption increases with increasing hydrophobicity. This is attributed to unhindered dipole interaction of water with the more isolated active sites of like charges. Accordingly, water is shown to become less entropic as the hydrophobicity is increased. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
Book Description
Water adsorption isotherms were measured for the polymorphs of octahydro-1,3,5,7-tetranitro-s-tetrazine (HMX). Water is found to sorb into the crystal structure in the order, gamma-HMX> alpha-HMX, and not at all into beta-HMX. The thermodynamics of water interaction with the surface of beta-HMX was studied as a function of grinding action. Grinding reduces the free surface energy of beta-HMX from 25 to 5 ergs/sq cm, and increases the hydrophobic character of the surface by a factor of 12. The calculated thermodynamic functions support the concept of adsorption of water in clusters on both ground and unground beta-HMX surfaces. The integral heat of water adsorption increases with increasing hydrophobicity. This is attributed to unhindered dipole interaction of water with the more isolated active sites of like charges. Accordingly, water is shown to become less entropic as the hydrophobicity is increased. (Author).
Scientific and Technical Aerospace Reports
Technical Abstract Bulletin
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Government-wide Index to Federal Research & Development Reports
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1470
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1470
Book Description
U. S. Government Research and Development Reports
U.S. Government Research & Development Reports
Government Reports Announcements
Bibliography of Scientific and Industrial Reports
Government Reports Announcements & Index
Studies on the Polymorphs of HMX
Author: Howard H. Cady
Publisher:
ISBN:
Category : Explosives
Languages : en
Pages : 54
Book Description
Publisher:
ISBN:
Category : Explosives
Languages : en
Pages : 54
Book Description