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Author: william wallace iii

Displaying records 21 to 30 of 95 records.
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21. Degradation of Polymeric Ballistic Materials
Published: 6/7/2007
Authors: Eun S. Park, Kathleen M. Flynn, Gale Antrus Holmes, Charles Martin Guttman, William E Wallace III
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854067

22. Numerical Optimization of Matrix-Assisted Laser Desorption/Ionization Time-of- Flight Mass Spectrometry: Application to Synthetic Polymer Molecular Mass Distribution Measurement
Published: 5/26/2007
Authors: William E Wallace III, Charles Martin Guttman, Kathleen M. Flynn, Anthony J Kearsley
Abstract: A novel approach is described for the selection of optimal instrument parameters that yield a mass spectrum which best replicates the molecular mass distribution of a synthetic polymer. The application of implicit filtering algorithms is shown to be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852703

23. Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry of Covalently-Cationized Polyethylene as a Function of Sample Temperature
Published: 1/1/2007
Authors: William E Wallace III, William R. Blair
Abstract: A pre charged, low mass, low polydispersity linear polyethylene was analyzed with matrix assisted laser desorption/ionization (MALDI) mass spectrometry as a function of sample temperature between 25 C and 150 C. This temperature range crosses the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852704

24. Development of NIST SRM 2881, an Absolute Molecular Mass Distribution Polymer Standard
Published: 9/1/2006
Authors: William E Wallace III, Charles Martin Guttman, Kathleen M. Flynn, Anthony J Kearsley
Abstract: We present a strategy to create an absolute molecular mass distribution polymer Standard Reference Material. To create a standard our methods must be free of operator bias (intentional or unintentional). The steps include sample preparation, instrume ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852655

25. Report on the 4th Annual NIST Polymer Mass Spectrometry Workshop: Future Directions in Soft Ionization of Polymers
Published: 1/10/2006
Author: William E Wallace III
Abstract: This year s annual workshop on polymer mass spectrometry was on the topic of Future Directions in Soft Ionization of Polymers . The workshop was sponsored by the Polymers Division of the National Institute of Standards and Technology (NIST) and fol ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852574

26. Report On The 4Th Annual Nist Polymer Mass Spectrometry Workshop: 'Future Directions In Soft Ionization Of Polymers'
Published: 1/1/2006
Author: William E Wallace III
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853986

27. Investigating the Environmental Stability of Ballistic Fibers Using Model Compounds and Mass Spectrometry
Published: 9/1/2005
Authors: Kathleen M. Flynn, William E Wallace III, Charles Martin Guttman, Gale Antrus Holmes, Mark Arnould
Abstract: Metrologies and predictive models to test and predict the long-term reliability of polymers used in ballistic resistant armor are presented.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852523

28. Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Interlaboratory Comparison of Mixtures of Polystyrene With Different End Groups: Statistical Analysis of Mass Fractions and Mass Moments
Published: 7/1/2005
Authors: Charles Martin Guttman, S Wetzel, Kathleen M. Flynn, B M Fanconi, David Lloyd VanderHart, William E Wallace III
Abstract: A matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) interlaboratory comparison was conducted on mixtures of synthetic polymers having the same repeat unit and closely matching molecular mass distributions but ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852470

29. 2,5-Dihydroxybenzoic Acid: Laser Desorption/Ionisation as a Function of Elevated Temperature
Published: 3/1/2005
Authors: William E Wallace III, Mark Arnould, R Knochenmuss
Abstract: The temperature dependence of laser desorption/ionization (LDI) ion yields has been measured for 2,5-dihydroxybenzoic acid (2,5-DHB) single crystals from room temperature to 160 C using time-of-flight mass spectrometry. A steep rise in ion producti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852380

30. Synopsis of the 2004 ASMS Fall Workshop on Polymer Mass Spectrometry
Published: 2/1/2005
Author: William E Wallace III
Abstract: This year s fall workshop of the American Society for Mass Spectrometry was on the topic of synthetic polymer mass spectrometry and was chaired by Robert P. Lattimer (Noveon, Inc.) and Chrys Wesdemiotis (University of Akron, Department of Chemistry). ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852456



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