Reactions of CW Agents HD And GD with the Polymer Fabrics PVAM and CHEMCAT 41
Final rept. Aug 2011-Nov 2014
ARMY EDGEWOOD CHEMICAL BIOLOGICAL CENTER APG MD
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Reactive fabrics were studied for the Integrated Protective Fabric System IPFS project. The goal of the project was to develop a protective garment that has a lower thermal burden on the wearer by allowing heat and moisture transport. The garment prevents exposure to outside chemical weapons agents CWAs by a combination of absorption and reaction. New methods were developed to study the reactions of CWAs with solids based on Nuclear Magnetic Resonance NMR and Headspace Gas Chromatography GC. Reactive fabrics made of polyvinylamine PVAM and commercial ChemCAT 41 materials were tested by comparing several different methods to determine their reactivity. The CWAs that were used included bis2-chloroethyl sulfide HD and pinacolyl methylphosphonofluoridate GD. At an exposure of 10 gm2, 90 of a CWA was destroyed by the fabrics for HD and GD. The kinetics of GD reaction were studied using Solids HRMAS NMR, because both reactants and products could be detected with the method. For HD, the studies were more complex because the reactions appeared to form additional products with the polymers so the products were nonvolatile and nonextractable. Methods such as Headspace GC and solvent extraction with GC-Mass Spectrometry gave consistent results regarding the destruction of HD on the fabrics.