Graphene(TrG) and multi-walled carbon nanotubes (MWNTs) were used to modify the mechanical properties of silicone rubber(MVQ) and butadiene rubber(BR). The tensile strength of TrG/silicone rubber composites was improved about 14 times and the Shore A hardness was increased from 20 to 47 with 3 wt% of TrG. These properties were much higher than rubbers which were improved with MWNTs. Percolation threshold of silicone rubber conductive composites filled with TrG was 2 wt%

the conductivity of which was 1×10

-5

S/cm. MWNTs/silicone rubber composites were prepared by solution method

while percolation threshold was 5 wt%

the conductivity was 2.38×10

-7

S/cm. The same tendency had been observed in TrG and MWNTs/BR system. The different dispersion behavior of TrG and MWNTs could be contributed to the difference in their interaction with polymer matrix due to their various geometry and topology. Based on SEM and TEM analysis

the dispersion of MWNTs in silicone rubber matrix was extremely difficult in comparison with TrG

although both of them possess the same chemical structure. Both planes of graphene could interact with polymer chains

enlarge the contact area of graphene with matrix

which lead to the strong interaction between graphene and rubber. The dispersion of graphene in rubber could be obtained even in the weak interaction system such as TrG/butadiene rubber system.