Extensive test data exist on the ignitability of nonmetallic materials in pure oxygen, but these
characteristics are not as well understood for lesser oxygen concentrations. In this study, autogenous ignition
temperature testing and pneumatic impact testing were used to better understand the effects of oxygen
concentration on ignition of nonmetallic materials. Tests were performed using oxygen concentrations of 21,
34, 45, and 100 %. The following materials were tested: PTFE Teflon®, Buna-N, Silicone, Zytel® 42,
Viton® A, and Vespel® SP-21.