Influence of Carbon Black and Silica Fillers with Different Concentrations on Dielectric Relaxation in Nitrile Butadiene Rubber Investigated by Impedance Spectroscopy

Polymers

Young-Il Moon¹  Gyung-Hyun Kim²  Jae-Kap Jung³  Jong-Woo Bae⁴  Myung-Chan Choi⁴ 

[1] Department of Electrical Engineering, Pohang University of Science and Technology, Pohang 37673, Korea;Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Jinju 52828, Korea;Hydrogen Energy Materials Research Center, Korea Research Institute of Standards and Science, Daejeon 34113, Korea;Rubber Research Division, Korea Institute of Footwear & Leather Technology, Busan 47154, Korea;

关键词: nitrile butadiene rubber;    dielectric relaxation;    impedance spectroscopy;    carbon black;    activation energy;   

DOI  :  10.3390/polym14010155

来源: DOAJ

【 摘 要 】

In neat nitrile butadiene rubber (NBR), three relaxation processes were identified by impedance spectroscopy: α and α′ processes and the conduction contribution. We investigated the effects of different carbon black (CB) and silica fillers with varying filler content on the dielectric relaxations in NBR by employing a modified dispersion analysis program that deconvolutes the corresponding processes. The central frequency for the α′ process with increasing high abrasion furnace (HAF) CB filler was gradually upshifted at room temperature, while the addition of silica led to a gradual downshift of the center frequency. The activation energy behavior for the α′ process was different from that for the central frequency. The use of HAF CB led to a rapid increase in DC conductivity, resulting from percolation. The activation energy for the DC conductivity of NBRs with HAF CB decreased with increasing filler, which is consistent with that reported in different groups.

【 授权许可】

Unknown