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8 results on '"Williams, Darren L."'

1. Choosing and Setting Up a Cleaning Process

Author

Kanegsberg, Barbara, Kanegsberg, Ed, and Williams, Darren L.

Subjects
Engineering and manufacturing industries, Metals, metalworking and machinery industries
Abstract

Choosing the right cleaning process for an application takes thought and understanding. Knowing the basics of cleaning, the costs associated with it, as well as how to test, validate and [...]

Published
2022

2. Good Bonding/Coating With Contact Angle Measurements

Author

Williams, Darren L.

Subjects
Surface energy -- Measurement, Engineering and manufacturing industries, Metals, metalworking and machinery industries
Abstract

The Cleaning Research Group often receives these common questions about contact angle measurements from people who are looking for alternatives to the water break or Dyne pen tests. Q: What [...]

Published
2022

4. High-resolution infrared studies of Al(BH4)3 and Al(BD4)3

Author

Al-Kahtani, Abdullah, Williams, Darren L., Nibler, Joseph W., and Sharpe, Steven W.

Subjects
Infrared spectroscopy -- Usage, Aluminum compounds -- Analysis, Vibrational spectra -- Analysis, Borane -- Analysis, Chemicals, plastics and rubber industries
Abstract

High-resolution Fourier-transform infrared spectra of Al(BH4)3 and Al(BD4)3 were obtained for low-pressure samples at room temperature. Results indicated only wide vibrational bands with no resolved rotational structure. The BH bridge stretching and the BH2 deformation areas were also analyzed at 0.001/cm resolution through tunable infrared diode laser spectroscopy for samples cooled to about 10 K in a multipass, slit expansion. Results showed near continua, with much more crowding than predicted by nonrigid rotor simulations based on boron isotopic shifts.

Published
1998

6. UV induced degradation rates of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)

Author

Williams, Darren L., Timmons, James C., Woodyard, James D., Rainwater, Ken A., Heh, John L., Lightfoot, James M., Richardson, Ben R., and Burgess, Caroline E.

Subjects
Electron paramagnetic resonance spectroscopy -- Research, Benzene -- Research, Chemicals, plastics and rubber industries
Abstract

The photolytic degradation and radical production rates in TATB are studied as a function of 24 different combinations of humidity, temperature, and illumination. A substantial amount of radicals can be generated with UV light, and efforts are being made to modify EPR spectrometer so that TATB can be irradiated in the EPR cavity to measure the initial rates of radical production.

Published
2003

8. Good Bonding and Coating with Contact Angle Measurements.

Author

Williams, Darren L.

Subjects
PHYSICAL & theoretical chemistry, SURFACE coatings, SURFACE tension, SURFACE energy, SURFACE cleaning, CONTACT angle
Abstract

The article presents questions and answers about contact angle measurements from people who are looking for alternatives to the water break or Dyne pen tests including benefits of fluid filtration, metal surface energy, and water contact angle.

Published
2022

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