Abstract
The expanded graphite intercalated compound (GIC)/poly(dimethyl siloxane) (PDMS) composites were pre- pared and the effects of cyclic stretching on the morphology, thermal conductivity and surface resistance of the com- posites were investigated. PDMS resin did not penetrate into the pores of the expanded GIC. The uniform distribution and spatially connected GICs in the PDMS matrix resulted in improved thermal conductivity and decreased sheet resis- tance. The thermal conductivity and sheet resistance of GIC(20 wt%)/PDMS composites were changed after 1000 cycles of 20% tensile strain from 0.80 W/mK and 6×10 Ω/sq to 0.69 W/mK and 3.04×10 Ω/sq, respectively. The decreased thermal conductivity and the increased sheet resistance of the composites after cyclic stretching was attributed to the for- mation of the interfacial crack between PDMS matrix and the GIC filler.
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