Hydrogenated Nitrile-Butadiene Rubber

The residual carbon-carbon double bond in nitrile butadiene rubber (NBR) can be catalytically hydrogenated to yield its tougher and more stable derivative, hydrogenated nitrile butadiene rubber (HNBR).2 This class of specialty elastomer was developed to expand the range of operating environments possible for nitrile butadiene rubber NBR in environments that expose the rubber to chemical and thermal attack. 

Fig. 19.1 Schematic process for the production of hydrogenated nitrile butadiene rubber (HNBR).

Choudhury et al. [36] in their work on hydrogenated nitrile butadiene rubber (HNBR)-nanoclay systems showed the thermodynamic aspects of nanocomposite formation using the mean-field-lattice-based description of polymer melt intercalation, which was first proposed by Vaia and Giannelis [37]. Briefly, the free... 

Fig. 6. Hydrogen production from irradiated hydrogenated nitrile-butadiene rubber (HNBR) with additives The low doses curve shows incubation zone of hydrogen production caused by the reach of primary radiolysis products with additives.

Problem 5-18 (Level 3) Parent et al. have studied the selective hydrogenation of C=C bonds in nitrUe-butadiene rubber (NBR) to produce hydrogenated nitrile-butadiene rubber (HNBR), which has superior resistance to thermal and chemical degradation. To obtain the desired product, the rate of hydrogenation of C=C bonds must be much higher than the rate at which the nitrile group (- C=N) is hydrogenated. 

HNBR Hydrogenated nitrile-butadiene rubber Zetpol ... 

In an initial study, various antioxidants were evaluated in hydrogenated nitrile-butadiene rubber (HNBR), polyacrylic elastomer (ACM), and ethylene-acrylic elastomer (EAM), polymers which are frequently used in applications requiring high heat and oil resistance. Compounds of these elastomers were first immersed in ASTM 901 Oil to remove any soluble antioxidants that could be extracted in service, and later heat aged up to 21 days at 177°C in air. Similar agings were performed with samples placed in... 

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