Abstract:

PE-HD/EVA/PE-LD/ACET conductive foamed composites were prepared using acetylene carbon black (ACET) as a conductive filler, azobisformamide (AC) as a foamer, and dicumyl peroxide(DCP) as a cross-linker. Closed cell structure was obtained when PE-HD/EVA/PE-LD is 50：30：20（w/w/w）,and acetylene carbon black, azobisformamide, and dicumyl peroxide content were 35, 4, and 0.5 wt %, respectively. The prepared conductive foam composites had good switching characteristics, and displayed positive temperature coefficient (PTC) effect, which was the strongest when the contents of AC was 4 wt %.

Key words: Composition materials, Carbon black, High-density polyethylene, Foam, Positive temperature coefficient(PTC) effect