Influence of surface treatment on PTC characteristic of low density polyethylene/carbon black composites

The PTC behavior of low density polyethylene(LDPE)/carbon black (CB)composites was investigated using CB surface treated with titanate coupling agent as conducting particles and LDPE as matrix.The profile and dispersion behaviors of CB particles were also analyzed.The results showed that the homogeneously dispersed CB particle in matrix could be obtained.The conductivity of the LDPE/CB composites was remarkably enhanced,and the PTC intensity increased one order,and the resistance stability of the composites was improved.