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Thermal Decomposition Kinetics of HMX
Nucleation-growth kinetic expressions are derived for thermal decomposition of HMX from a variety of types of data, including mass loss for isothermal and constant rate heating in an open pan, and heat flow for isothermal and constant rate heating in open and closed pans. Conditions are identified in which thermal runaway is small to nonexistent, which typically means temperatures less than 255 C and heating rates less than 1 C/min. Activation energies are typically in the 140 to 165 kJ/mol regime for open pan experiments and about 150-165 kJ/mol for sealed-pan experiments. The reaction clearly displays more than one process, and most likely three processes, which are most clearly evident in open pan experiments. The reaction is accelerated for closed pan experiments, and one global reaction fits the data fairly well. Our A-E values lie in the middle of the values given in a compensation-law plot by Brill et al. (1994). Comparison with additional open and closed low temperature pyrolysis experiments support an activation energy of 165 kJ/mol at 10% conversion.
Date:
March 17, 2005
Creator:
Burnham, A K & Weese, R K
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, March 17, 2000
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2000
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, March 17, 2006
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2006
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, March 17, 2003
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2003
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Sunday, March 17, 2002
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2002
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, March 17, 2005
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2005
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, March 17, 2004
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2004
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 3, Ed. 1 Friday, March 17, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 2, Ed. 1 Sunday, March 17, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 294, Ed. 1 Friday, March 17, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 109, No. 247, Ed. 1 Monday, March 17, 2008
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2008
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 111, No. 179, Ed. 1 Tuesday, March 17, 2009
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 17, 2009
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Development and Applications of Time of Flight Neutron Depth Profiling
The depth profiles of intentional or intrinsic constituents of a sample provide valuable information for the characterization of materials. For example, the subtle differences in spatial distribution and composition of many chemical species in the near surface region and across interfacial boundaries can significantly alter the electronic and optical properties of materials. A number of analytical techniques for depth profiling have been developed during the last two decades. neutron Depth Profiling (NDP) is one of the leading analytical techniques. The NDP is a nondestructive near surface technique that utilizes thermal/cold neutron beam to measure the concentration of specific light elements versus their depth in materials. The depth is obtained from the energy loss of protons, alphas or recoil atoms in substrate materials. Since the charged particle energy determination using surface barrier detector is used for NDP, the depth resolution is highly dependent on the detectors an d detection instruments. The depth resolutions of a few tens of nm are achieved with available NDP facilities in the world. However, the performance of NDP needs to be improved in order to obtain a few A depth resolutions.
Date:
March 17, 2005
Creator:
Cady, Bingham & Unlu, Kenan
Object Type:
Report
System:
The UNT Digital Library
Boerne Star & Recorder (Boerne, Tex.), Vol. 100, No. 22, Ed. 1 Friday, March 17, 2006
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2006
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 103, No. 22, Ed. 1 Tuesday, March 17, 2009
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2009
Creator:
Cartwright, Brian & Velvin, Candace E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 119, Ed. 1 Friday, March 17, 2000
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2000
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 111, Ed. 1 Saturday, March 17, 2001
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2001
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 80, No. 112, Ed. 1 Sunday, March 17, 2002
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2002
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 81, No. 112, Ed. 1 Monday, March 17, 2003
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2003
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 106, Ed. 1 Wednesday, March 17, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 84, No. 103, Ed. 1 Thursday, March 17, 2005
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2005
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 85, No. 98, Ed. 1 Friday, March 17, 2006
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 17, 2006
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
[From behind the podium]
Raymund Paredes speaks from behind a podium.
Date:
March 17, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[View from the audience]
None
Date:
March 17, 2005
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library