Abstract
The effect of cross‐linking of blends on the stability of positive temperature coefficient (PTC) and the elimination of negative temperature coefficient (NTC) were investigated. Linear low density polyethylene (LLDPE) was chemically cross‐linking with various amounts of dicumyl peroxide (DCP). The resulting of cross‐linking structure of composites was analyzed by gel content, differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). By the effect of DCP, not only a high PTC intensity appeared, but also was the NTC effect of the composite eliminated. The PTC intensity reached six orders of magnitude for the LLDPE/DCP(0.10 wt%)/CB/Al(OH)3 composite, and successfully passed the test of over‐voltage resistance.
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