LAUSR

Low-density polyethylene (LDPE)/carbon black (CB) composites were fabricated via meltcompounding technique. The percolation threshold was found to be around 20 wt% CB, and an electrical network formed by conductive CB was proven by SEM investigation. Dielectric responses depicted an interfacial relaxation peak at 20 wt% CB content. LDPE/CB composites showed an electric field-dependent conductivity as well as a hysteresis behavior around the percolation threshold region. The CB particles with high thermal conductivity increased the heat conductance of the LDPE/CB20 up to 56%. The dynamic mechanical analysis (DMA) of the LDPE/CB composites exhibited a noticeable contribution of CB throughout the composites, increasing the storage and loss modulus. The physical interactions between CB particles in the * Correspondence to: Claudiane M. Ouellet-Plamondon, Email address : [email protected] Department of Construction Engineering, École de technologie supérieure (ÉTS), Université du Québec, 1100 Notre-Dame St W, Montreal, QC H3C 1K3 Canada. This is the peer reviewed version of the following article: Azizi, S., David, E., Fréchette, M. F., Nguyen-Tri, P. and Ouellet-Plamondon, C. M. ( 2019), Electrical and thermal phenomena in low-density polyethylene/carbon black composites near the percolation threshold. Journal of Applied Polymer Science, 136, 47043. doi: 10.1002/app.47043, which has been published in final form at https://doi.org/10.1002/app.47043. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. filler network enhanced the thermal degradation of the LDPE/CB25 composite for more than 76 °C. The maximum breakdown strength of the LDPE/CB composites appeared with an approximately 10 % improvement for LDPE/CB5 than pure LDPE.