acrylonitrile-butadiene rubber
- Molecular Weight: 0
- Update Date: 2024-01-16 15:37:41
What is acrylonitrile-butadiene rubber?
Description
Nitrile rubber (NR) is a copolymer of butadiene and acrylonitrile. It is produced in different ratios varying from 25:75 to 75:25. The manufacturer’s designation should identify the percentage of acrylonitrile. Nitrile rubber under the common trade name Buna? N is well known for its excellent resistance to oils and solvents owing to its resistance to swelling when immersed in mineral oils. Moreover, its chemical resistance to oils is proportional to the acrylonitrile content. However, it is not resistant to strong oxidizing chemicals such as nitric acid, and it exhibits fair resistance to ozone and to UV irradiation which severely embrittles it at low temperatures. Nitrile rubber is used for gasoline hoses, fuel pumps diaphragm, gaskets, seals and packings (e.g., o-rings) and finally oil-resistant soles for safety work shoes.
Chemical properties
(Medium acrylonitrile) D (polymer) 0.98, tensile strength (psi) 1000–3000, elongation (%) 100–700, maximum service temperature 121– 148C. Combustible.
The Uses of acrylonitrile-butadiene rubber
(High acrylonitrile) Oil well parts, fuel-tank liners, fuel hoses, gaskets, packing oil seals, hydraulic equipment. (Medium acrylonitrile) General-purpose oil-resistant applications, shoe soles, kitchen mats, sink topping, and printing rolls. (Low acrylonitrile) Gaskets, grommets, and O-rings (flexible at a very low temperature), adhesives. Fuel binder in solid rocket propellants.
Definition
(acrylonitrile rubber; acrylonitrilebutadiene rubber; nitrile-butadiene rubber; NBR). A synthetic rubber made by random polymerization of acrylonitrile with butadiene by free radical catalysis. Alternating copolymers using Natta–Ziegler catalyst have been developed. Approximately 20% of the total is used as latex; also available in powder form. Its repeating structure may be represented as –CH2CH=CHCH2CH2 CH(CN)–.
Definition
A copolymer of butadiene and propenonitrile (acrylonitrile) (CH2=CHCN). It is an important rubber due to its resistance to oil and solvents.
Definition
nitrile rubber: A copolymer ofbuta-1,3-diene and propenonitrile. Nitrilerubbers are commercially important synthetic rubbers because oftheir resistance to oil and many solvents.See also buna rubber.
Industrial uses
Nitrile butyl rubber (NBR) has excellent resistance to mineral and vegetable oils, but relatively poor resistance to the swelling action of oxygenated solvents such as acetone, methyl ethyl ketone, and other ketones. It has good resistance to acids and bases except those having strong oxidizing effects. Resistance to heat aging is good, often a key advantage over natural rubber. With compounding, nitrile rubbers can provide a good balance of low creep, good resilience, low permanent set, and good abrasion resistance.
Tear resistance is inferior to that of natural rubber, and electrical insulation is lower. Uses of NBR include carburetor and fuel-pump diaphragms and aircraft hoses and gaskets. In many of these applications, the nitriles compete with polysulfides and neoprenes.
An outstanding feature of nitrile rubber is its compatibility with many different types of resins permitting it to be easily blended with them. In combination with phenolic resins it provides adhesives with especially high strengths. Nitrile rubber phenolic resin solvent solutions are used in shoe sole-attaching adhesives, for structural bonding in aircraft, adhering automotive brake lining to brake shoes, and many other industrial applications. The ratio of butadiene to acrylonitrile in the commercially available rubbers ranges from a low of about 20% to as high as 50% acrylonitrile. The various grades are usually referred to as high, medium-high, medium-low, and low acrylonitrile content.
Safety information for acrylonitrile-butadiene rubber
New Products
(R)-(-)-2-Amino-1-propanol Tetrahydro-4H-pyran-4-one Bromine 99.5% AR (4 x 500ml) Linseed Oil Extrapure Hydrogen Sulphide Solution Oxalic Acid 0.05 mol/L (0.01N) Solution EDTA 0.1 mol/L (0.2N) for 1000 ml Ferroin 0.025M Solution AR 1,2,3,4-Tetrahydrocarbazol-4-one 4-Hydroxy Carbazole Amino Salicylic Acid. U.S.P. 2 – Methoxy – 5- Sulfamoyl Benzoic acid Acetone Isobutryl oxime ester Sodium Amino Salicylate Dihydrate (PAS Sodium) IP/BP/USP/EP Aloe vera extract 200x Withania somnifera (Ashwagandha Extract) Citrus bioflavonoids Extract Spirulina (Arthrospira platensis) Powder Trikatu Extract Thymol Oil Ethyl 3-(Pyridin-2-Ylamino)Propanoate Bilastine -IP/BP/ Cypermethric Acid Chloride 5-NitrosalicylaldehydeRelated products of tetrahydrofuran
You may like
-
7726-95-6 Bromine 99.5% AR (4 x 500ml) 99%View Details
7726-95-6 -
Formamide 99%View Details
75-12-7 -
2, 4-Pyrimidinediamine 3-Oxide 99%View Details
74638-76-9 -
85-81-4 6-Methoxy-8-Nitroquinoline 99%View Details
85-81-4 -
3-Bromo-4,5-Dihydro-1H-Benzo[B]Azepin-2(3H)-One 99%View Details
86499-96-9 -
(−)-Dip-Chloride 85116-37-6 99%View Details
85116-37-6 -
29943-42-8 Tetrahydro-4H-pyran-4-one 98+View Details
29943-42-8 -
35320-23-1 98+View Details
35320-23-1