Effects of glass-to-rubber transition on the temperature, load and speed sensitivities of nano-ZrO2 reinforced polybenzoxazine

In the present work, nano ZrO2 reinforced polybenzoxazine composites were produced. The friction behaviors of ZrO2–polybenzoxazine nanocomposites were evaluated on a chase friction material test machine. An attempt was made to examine the variation of storage modulus, loss modulus and glass-to-rubber transition on the effect of the temperature, load and speed sensitivity of ZrO2–polybenzoxazine nanocomposites. The results revealed that the temperature and load sensitivity of nanocomposites increased with the increasing of load and temperature. This behavior was speculated to be due to the effect of the temperature dependence of modulus in the surface topography and strength. But speed sensitivity varies with the temperature, due to the effect of temperature dependence of viscoelastic response in the energy dissipation.