The effect of temperature on the friction wear properties of a kind of liner Polyimide (YS-20) and a kind of crosslinked Polyimide (KH-304) was studied using a pin on disc wear tester.The test results showed that with sliding time increasing

friction coefficient of YS-20 increased to a maximum then decreased to steady value

but that of KH-304 decreased directly to steady value.For a steady value of friction coefficient

with temperature increasing

the friction coefficient of YS-20 increased to a maximum value then decreased

but that of KH-304 decreased directly to steady value.Wear rate of the both Polyimides (PIs) increased with temperature increasing.The wear rate of KH-304 was higher than that of YS-20 under the same temperature.Scanning Electron Micrograph (SEM) analysis indicated that with temperature elevating

debris of YS-20 appearances changed obviously

but that of KH-304 varied little.Fourier Transform infrared Spectrometer (FTIR) indicated that the tribochemical reaction of KH-304 occurred more obviously than that of YS-20.The analysis above suggest that the surface layer of the linear PI changed from glassy body

to elastomer and then to melting body.Tribochemical reaction occurred at the surface of the crosslinked PI

which effect the friction-wear properties of the linear PI and crosslinked PI respectively.