The effect of different types of carbon blacks on the rheological and thermal properties of acrylonitrile butadiene rubber

Abstract

The influence of two types of carbon black filler N330 and N990 (primary particle size 46 nm and GT 230 nm) on elastomeric composites based on acrylonitrile-butadiene rubber (NBR) have been investigated. The activation energy (E (a)) were determined from two high temperature rheokinetic curves (T (1) = 180 A degrees C and T (2) = 190 A degrees C). For tensile testing, the compounds with different content of carbon black were vulcanized in a hydraulic press at 150 A degrees C. The stress-strain experiments were performed before and after ageing the specimens in an air-circulating oven at 100 A degrees C for 168 h. The thermal degradation and thermal stability of carbon black filled NBR rubber was investigated by thermogravimetric analysis in a flowing nitrogen atmosphere at a heating rate of 10 A degrees C/min.