Fourier-Transform Infrared (FTIR) Characterization of Chemical Agent ResistantCoatings (CARC) Durability Using Infrared (IR) Cards and Silicon Wafers

摘要

Rapid, cost-effective sampling accessories for Fourier-Transform Infrared (FTIR)analysis are quite suitable with minimum sample preparation in coating materials studies. The U.S. Army's camouflage, polyurethane topcoat MIL-C-46l68, Chemical Agent Resistant Coating (CARC) was applied to infrared (IR) cards and silicon wafers. After curing, the coating's durability was tested using two separate accelerated weathering techniques (QUV-CON and Xenon-Arc), and as well as, two outdoor exposure test methods (South Florida and EMMA(QUA)*-NTW). Characterization of the binder's chemical changes during both natural and accelerated weathering processes was monitored using the FTIR. This final report summarizes the experimental results of the coating's resistance to the accelerated-weathering and outdoor-exposure conditions. Additionally, a brief description of the author's method is described for the preparation of silicon wafers and subsequent FTIR analysis.