Recycled nitrile rubber

PP has also been blended with various proportions of recycled nitrile rubber (rNBR) crumb in the presence of a co-agent (trimethylolpropane triacrylate, TMPTA) [8]. The level of TMPTA used was 3 phr based on the amount of nitrile rubber (NBR) and crosslinking of the mixtures achieved using electron-beam irradiation at a level of 40 kCy. The irradiation process was found to improve both the interfacial adhesion between the phases in the blend and their physical properties when these were compared with non-irradiated samples. 

Small Quantities. Wear nitrile rubber gloves, laboratory coat, and eye protection. Work in the fume hood. Dissolve the compound in a minimum of 6 M hydrochloric acid (add concentrated acid to an equal volume of cold water). Filter and treat the filtrate with a slight excess of 6 M ammonium hydroxide (add 42 mL of concentrated ammonium hydroxide to 58 mL of cold water, about pH 8 to pHydrion paper). Boil and allow the coagulated precipitate to settle for about 12 hours. Filter and dry. Recycle, return to supplier, or send for disposal in a secure landfill.6 7... 

Metal Powder Wear nitrile rubber gloves, laboratory coat, and eye protection. Avoid breathing dust. Scoop into container for reuse or recycling. 

Small Quantities. Wear nitrile rubber gloves, eye protection, laboratory coat, and respirator (or work in hood). The selenium salt is dissolved in water and the solution is neutralized by the addition of 1 M NaOH (prepared by dissolving 4 g of NaOH in 100 mL of water) or 1 M sulfuric acid (prepared by cautiously adding 5 mL of concentrated acid to 85 mL of cold water). A 1 M solution of sodium sulfide (prepared by dissolving 7.8 g of Na2S in 100 mL of water) is added to the selenium salt solution and the pH is again adjusted to neutral with 1 M sulfuric acid solution. The precipitate is separated by filtration or decantation. Wash, dry, and recycle or send for disposal in a secure landfill.1 ... 

Wear eye protection, laboratory coat, and nitrile rubber gloves. Work in the fume hood. Carefully add solid to a large quantity of water in a beaker (50-100 mL/g). Cautiously neutralize with aqueous sodium hydroxide until reaction ceases. Wash the solution into the drain.7 For large quantities, recycling silver may be worthwhile.4,7... 

Wear nitrile rubber gloves, laboratory coat, goggles, a face shield, and, if necessary, a self-contained breathing apparatus. Cover the spill with a 1 1 1 mixture by weight of soda ash or calcium carbonate, clay cat litter (bentonite), and sand. When the trifluoroacetic acid (anhydride) has been absorbed, scoop the mixture into an appropriately labeled container for recycling or disposal by burning.4-6... 

Carboxylated nitrile rubber Zn ionomer (90-50)/EAA Zn ionomer (10-50) Physical properties vs. blends of non-ionomeric polymers/FTIR/DMA/also use of recycle Antony et al. 2000... 

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