The dynamic coefficient of friction, mu(d), of the plastic bonded explosive (PBX) LX-04 was measured on stainless steel, aluminum, Teflon and the explosive itself as a function of temperature between ambient and 135 degreesC at a rotational speed of 0.0025 rad/s(-1). An optical profilometer was used to analyze surface roughness. LX-04 is a composite of the explosive 1,3,5,7-tetranitroazacyclooctane (HMX) and Viton A in an 85/15 weight ratio. For LX-04 on stainless steel, mu(d) decreased from 0.38 at ambient to 0.18 at 95 degreesC, then was nearly constant to about 125 degreesC, where the coefficient began to increase again. The opposite behavior was observed for aluminum. Against Teflon mu(d) was nearly constant from ambient to 65 degreesC at 0.43, and then decreased to 0.17 from 100 degreesC to 135 degreesC. Against LX-04 itself the coefficient of friction averaged 0.64 at temperatures between 35 degreesC and 95 degreesC, but tended to increase during the measurement, probably due to adhesion of the Viton to itself. Above 95 degreesC the coefficient dropped off and became nearly constant again at 0.16 up to 135 degreesC. Measurements on stainless steel with the mock explosive RM-04-BR, a composite of cyanuric acid and Viton A, and with the same weight ratio as the actual explosive, compared reasonably well with the explosive itself.