The influence of carbon black on curing kinetics and thermal aging of acrylonitrile-butadiene rubber

Abstract

Elastomers based on a copolymer of butadiene and acrylonitrile (NBR) have excellent oil resistance but are very sensitive for degradation at very high temperatures. The aim of this applicative contribution was to determine the effect of high abrasion furnace carbon black with primary particle size 46 nm on aging properties of elastomeric materials based on NBR as network precursor. The curing kinetics was determined using the rheometer with an oscillating disk, in which the network formation process is registered by the torque variation during time. The vulcanizates were obtained in a hydraulic press at 150 °C. The mechanical properties of elastomeric composites were determined before and after thermal aging in an air circulating oven. The reinforcing effect of the filler particles was assessed according to mechanical properties before and after aging.Elastomers are cross-linked polymers with a low modulus of elasticity and the capability to reverse large deformations at their service temperatures. The low modulus of elastomers, combined with their high deformation reversibility, allows their use in a wider range of applications [1]. For more than a century, elastomer and carbon black (CB) have played a central role in tire technology as active filler. At the onset, the usages of regular industrial soot and natural rubber have opened the way to an industry in the continuous evolution. The rubber industry began when Goodyear developed the first useful rubber compound of natural rubber with sulphur. The concept of mixing materials into rubber to improve performance is still of primary importance today. Without fillers, few rubber goods would be of any commercial value. The curing

Curing characteristics, swelling, and mechanical properties of natural rubber/nitrile butadiene rubber blends with and without compatibilizer

“…The heat also produces energy that can accelerate a reaction. The delta torque is associated with crosslink density (Jovanović et al, 2009). The crosslink density is one of the important properties affecting the major characteristics of vulcanized rubber (ElSabbagh & Yehia, 2007).…”

Cause of Fuel Leakage from the Inner Piston Packing of Afterburner Fuel Pump in an Aircraft J85-GE-21 Turbojet Engine

“…In general, swelling increases with decrement of tensile strength, hardness, crosslink density and increment of elongation and compression set. 7 From these results, it was concluded that the failed was very weak to fuel resistance.…”

“…Nitrile butadiene rubber (NBR) family is most notable for its high resistance to oils, fuels, and other chemicals. 7,10 It has wide temperature range from -51 to 125℃.…”

Peningkatan mutu blanket karet alam melalui proses predrying dan penyemprotan asap cair

“…Derajat vulkanisasi ini menunjukkan derajat ikatan silang yang terbentuk (Cifriadi, 2013). Delta S (ΔS) dapat diindikasikan secara tidak langsung sebagai pembentukan jaringan dalam sistem ikatan silang (Jovanovici et al, 2009).…”