Abstract
The effect of the oxidation treatment of carbon black (CB) on its distribution state in the polymer blends was examined by scanning electron microscopy. This treatment lends to a transfer of CB particles from one phase to another of the polymer blend. This exchange of filler rich phase influences the positive temperature coefficient (PTC) property of the polymer blend filled with CB. It was concluded that PTC property of a polymer blend filled with CB is decided by the distribution state of fillers in the polymer blend, the thermal expansion properties of each component and the blend ratio.
