Advances in Nitrile Rubber Technology

Abstract

Considerable advances have been made in NBR technology and still more are possible. The heat resistance of NBR has been raised so that it will with-stand 150°C in air for short periods, instead of 120°C. There is potential in the polymer backbone for still greater stability. It has been demonstrated that the ozone resistance of NBR can be improved by blending with EPDM, but the optimum blend has not yet been developed. The use of PVC to improve the ozone resistance of NBR is now much better understood. Crosslinked NBR has been developed as a non-migratory plasticizer which improves embossing characteristics of PVC and PVC-ABS blends. This, in turn, led to the production of NBR powders which may be used to speed up compounding on conventional equipment and permit rubber to be compounded in equipment generally used for fabricating plastics. Powder black masterbatches of NBR are now being evaluated in industry. Another new product form is liquid NBR, generally with reactive end groups. This is already established as an impact modifier for resins and may be a route to castable reinforced elastomers. Polymer structure modifications such as alternating 50:50 copolymers are interesting but do not appear to have found a market. Carboxylated NBR uses are growing in the wake of improvements in scorch resistance. Reprocessible vulcanizates based on amine-modified NBR have been announced, but a true thermoplastic NBR is still awaited.

Experimental and Simulation Studies on Nonwoven Polypropylene–Nitrile Rubber Blend: Recycling of Medical Face Masks to an Engineering Product

“…15 NBR is a polar synthetic rubber and a copolymer of acrylonitrile (ACN) and butadiene monomers with extraordinary oil resistance, moderate tensile strength and abrasion resistance, good heat and chemical resistance, high electrical conductivity, and low temperature flexibility. 16 An increase in the ACN content will result in a dramatic change in the properties of the NBR matrix. 17,18 Unequivocally, the properties of the PP−NBR blend would be a drastic combination of the properties of both PP and NBR, which can be used for various applications.…”

“…PP is a non-polar material with excellent resistance to heat, moisture, and extreme weather conditions; is mechanically strong and chemically inert; and has a high-volume resistivity, high-frequency insulating property, and high abrasion resistance . NBR is a polar synthetic rubber and a copolymer of acrylonitrile (ACN) and butadiene monomers with extraordinary oil resistance, moderate tensile strength and abrasion resistance, good heat and chemical resistance, high electrical conductivity, and low temperature flexibility . An increase in the ACN content will result in a dramatic change in the properties of the NBR matrix. , Unequivocally, the properties of the PP–NBR blend would be a drastic combination of the properties of both PP and NBR, which can be used for various applications. − In parallel with experiments, computational assessment and prediction of polymeric properties have become increasingly demanding to accelerate the design and development of polymeric blends and composites.…”

Effects of Using Nitrile Rubber Foam and Solar Panels on Cover for Cooling Outdoor Sparking Car

“…Verdell Harris [9] showed a battery operated heating and cooling system using a Peltier type of thermoelectric device to provide a heat pump coupled with a blower to circulate air over the device and into car, this system is not energy efficient since it requires electric heating for heat transfer and is further time limited by the available energy in the storage battery. Nitrile rubber foam has been known as low thermal conductivity and big energy saving [10], it was applied wide in insulation for air conditioner. The aim of this study is to investigate effects of using nitrile rubber foam and solar panels on cover for cooling system outdoor sparking car.…”

Fatigue Behavior of Dynamically Vulcanized Poly(Vinyl Chloride)/Nitrile Butadiene Rubber Thermoplastic Elastomers

“…Polymer blends are versatile polymeric materials, the properties of which can be tailored accordingly [1] . One of the most common polymer blends is the mixture of nitrile butadiene rubber (NBR) with poly(vinyl chloride) (PVC).…”