Bound and free moisture studies of solid materials by FTNMR

Conference · Thu Nov 01 00:00:00 EST 1984

OSTI ID:6139611

Ward, R L; Happe, J A; Pyper, J W

Proton NMR has been used to study the moisure content of a number of solids: Triaminotrinitrobenzene (TATB) and its plastic bonded Kel-F derivatives, Kevlar, aerogel, and Teflon. Most of our studies have been with TATB which exhibits a broad 40KHz Pake doublet with a superimposed narrow water peak. Under high resolution the water peak can often be resolved into two peaks. A similar doublet has been observed with Kevlar and aerogel. Whereas the line widths of the doublet vary from 70 to 1000 Hz depending on the material. The chemical shift is constant at ca. 2.5 ppM. At least one line in TATB has been identified as water by examining samples that have taken up varying amounts of moisture from humid air. Variable temperature studies have been performed on a number of samples with differing results. The water of TATB does not freeze-out down to -60/sup 0/C and does not narrow until +105/sup 0/C, whereas the Kevlar doublet does not change on heating to 140/sup 0/C. Aerogel exhibits the water doublet plus a third narrow peak which are lost upon heating to 70/sup 0/C. Upon exposure to the atmosphere all three peaks return in almost the proportion. 6 references, 6 figures.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6139611
• Report Number(s): UCRL-91758; CONF-850441-2; ON: DE85003227
• Resource Relation: Conference: Moisture and humidity symposium, Washington, DC, USA, 15 Apr 1985; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
36 MATERIALS SCIENCE
TATB
MOISTURE
NMR SPECTRA
TEFLON
WATER
ARAMIDS
EXPERIMENTAL DATA
HYDROGEN 1
NMR SPECTROMETERS
NUCLEAR MAGNETIC RESONANCE
CHEMICAL EXPLOSIVES
DATA
EXPLOSIVES
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MATERIALS
MEASURING INSTRUMENTS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
RESONANCE
SPECTRA
SPECTROMETERS
STABLE ISOTOPES
SYNTHETIC MATERIALS
450100* - Military Technology
Weaponry
& National Defense- Chemical Explosions & Explosives
360402 - Polymers & Plastics- Structure & Phase Studies- (-1987)