Nitrile rubber and carboxylated nitrile rubber resistance to soybean biodiesel

Abstract

Biodiesel has been considered a suitable substitute for petroleum diesel, but their chemical composition differs greatly. For this reason, biodiesel interacts differently than petroleum diesel with various materials, including rubbers. Therefore, the resistance of some elastomers should be thoroughly evaluated, specifically those which are commonly used in automotive industry. Nitrile rubber (NBR) is widely used to produce vehicular parts that are constantly in contact with fuels. This paper aimed to assess the resistance of carboxylated nitrile rubber (XNBR) with 28% of acrylonitrile content to soybean biodiesel in comparison with non-carboxylated nitrile rubber samples, with high and medium acrylonitrile content (33 and 45%). NBR with medium acrylonitrile content showed little resistance to biodiesel. However, carboxylated nitrile rubber even with low acrylonitrile content had similar performance to NBR with high acrylonitrile content.

Extracting uncrosslinked material from low modulus sylgard 184 and the effect on mechanical properties

“…(c)], demonstrating that the extracted samples do not display a significantly noticeable stress softening. Our hysteresis results exhibit similar behavior to elastomers (e.g., natural rubber) swollen in solvents (e.g., biodiesel) for industrial applications, and are potentially useful for implementing softer commercial silicones for bioinspired adhesives, synthetic biomaterials, and soft devices.…”

Compatibility of Different Automotive Elastomers in Paraffinic Diesel Fuel

“…Although the compatibility of fuel with the materials used in a fuel supply system is always a key issue, the source literature does not contain many publications in the field of synthetic fuel's impact on the elastomers used in the automotive industry (GTL [33] and HVO [34]). Most publications address the impact of fuels with a FAME additive [35][36][37][38][39]. Their authors select fossil fuel blends with methyl esters obtained from various raw materials, which are then exposed to selected rubbers.…”