NASA Scientific and Technical Aerospace Reports

decomposes. This approach is advantageous in that it is nondestructive and provides a direct comparison with our weapon
headspace surveillance initiative. Nevertheless, this approach requires us to identify volatile material residue and
decomposition byproducts that are not typically monitored and reported in material aging studies. Similar to our weapon
monitoring method, our principle laboratory-based method involves static headspace collection by solid phase microextraction
(SPME) followed by gas chromatography/mass spectrometry (GC/MS). The primary organic material groups that make up
many of the weapon systems are chlorofluoropolymers, polysiloxanes, and polyurethanes (PUR). In the weapon headspace we
see the greatest residue from polysiloxanes and PUR and, therefore, are interested in identifying and quantifying the origin
responsible for their presence. Although we have produced a number of significant findings concerning the
chlorofluoropolymer and polysiloxane materials, this work focuses on the decomposition of PUR.
NTIS
Aging (Materials); Polymers; Polyurethane Resins; Gas Chromatography; Organic Materials
20040111434 NASA Glenn Research Center, Cleveland, OH, USA
Cermet Coatings for Solar Stirling Space Power
Jaworske, Donald A.; Raack, Taylor; [2004]; 20 pp.; In English; International Conference on Matallurgical Coatings and Thin
Films (ICMCTF-2004), 19-23 Apr. 2004, San Diego, CA, USA
Contract(s)/Grant(s): WBS 973-80-40
Report No.(s): Paper 558; Copyright; Avail: CASI; A03, Hardcopy
Cermet coatings, molecular mixtures of metal and ceramic are being considered for the heat inlet surface of a solar Stirling
space power converter. This paper will discuss the solar absorption characteristics of as-deposited cermet coatings as well as
the solar absorption characteristics of the coatings after heating. The role of diffusion and island formation, during the
deposition process and during heating will also be discussed.
Derived from text
Cermets; Solar Generators; Stirling Cycle; Protective Coatings
20040111722 Super Pulse, Ithaca, NY
Non-Thermal Plasma Decontamination Technology for Forward-Deployed Forces
Golkowski, Czeslaw; Sep. 2004; 2 pp.; In English
Contract(s)/Grant(s): N00014-03-M-0154
Report No.(s): AD-A425891; No Copyright; Avail: CASI; A01, Hardcopy
Non-thermal plasma processing is an emerging advanced oxidation technology for oxidation of hazardous
microorganisms and compounds at low temperature. The plasma generated during an electrical discharge or when an energetic
particle beam is injected into air produces copious free radicals. These free radicals are utilized in the chemical reactions,
which normally would require very high temperature. Neutralization of chemical and biological warfare simulant agents
deposited on surfaces was tested using non-thermal plasma source developed by Super Pulse. The surfaces tested varied from
plastics to metal. The results show that the non- thermal plasma produced by the developed source is a very effective oxidizer.
DTIC
Decontamination; Deployment; Oxidizers; Thermal Plasmas
20040111972 Air Force Research Lab., Hanscom AFB, MA
Oxidation of Alkyl Ions, CnH2n+1+ (n=1-5) in Reactions with O2 and O3 in the Gas Phase
Williams, Skip; Knighton, W. B.; Midley, Anthony J.; Viggiano, A. A.; Irle, Stephen; Sep. 24, 2003; 11 pp.; In English
Contract(s)/Grant(s): F49620-01-10183; F19628-99-C-0069; Proj-2303
Report No.(s): AD-A425497; AFRL-VS-HA-TR-2004-1131; No Copyright; Avail: CASI; A03, Hardcopy
Rate constants and product ion branching fractions are reported for the reactions of CH3(+), C2H5(+), s-C3H7(+),
s-C4H9(+), t-C4H9(+), and t-C3H11(+) with O2 and O3 at 300 K in a variable-temperature selected-ion flow tube (VT-SIFT).
The reaction rate constant for CH3(+) with O3 is large and approximately equal to the thermal energy capture rate constant
given by the Su-Chesnavich equation. The C2H5+, s- C3H7(+), and s-C4H9(+) ions are somewhat less reactive, reacting at
approximately 7-46% of the thermal capture rate. The HCO(+) and C2H3O(+) ions are the major products in these reactions.
The t-C4H9(+) and t-C5H11(+) ions are found to be unreactive, with rate constants \h5 x 10(exp -12)cu cm/s, which is the
present detection limit of our apparatus using this ozone source. Ozone is a singlet in its ground state, and ab initio calculations
at the B3LYP/6-3lG(d) level of theory indicate that reactant complexes can be formed, decreasing in stability with the size
of alkyl chains attached to the cationic carbon atom. The decreasing reactivity of the alkyl ions with increasing order of the
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