Materials: In this study, Natural Rubber (NR) and NR/styrene Butadiene Rubber (SBR) blend was used to investigate the effect of cure characteristics and mechanical properties of rubber compounds. PROPERTIES OF PLASTICS The following properties are common with most of the plastics. Silicone rubber can withstand thousands of cycles over a wide range of temperature making this material ideal for keyboard or exhaust hanger and vibration damping applications. If you’re looking to learn more about natural rubber, whether for sourcing or simply to educate yourself, this article is for you. [7] Other uses in vehicles include cooling system circuit hoses; water pumps, thermostats, EGR valves, EGR coolers, heaters, oil coolers, radiators, and degas bottles are connected with EPDM hoses. As with most rubbers, EPDM is always used compounded with fillers such as carbon black and calcium carbonate, with plasticisers such as paraffinic oils, and has useful rubbery properties only when crosslinked. Most rubber tires, however, regardless of size or style, share certain features. EPDM rubber (ethylene propylene diene monomer rubber)[1][2][3] is a type of synthetic rubber that is used in many applications. The chemical compatibility of rubber is extremely important as the rubber can degrade rapidly if the rubber material is not compatible with the environment or media that it comes into contact with. Material Choice Guide to Selecting Rubber Compounds: Elastomers Introduction: Elastomers are long-chain polymers which are capable of cross-linking which is referred to as vulcanization. Manufacturers often sell them in the color black, which reduces its UV resistance and insulating capabilities (although lighter-colored yet costlier EPDM membranes are also available). The inherent properties of strength, resilience and cut resistance have a direct effect on wear performance. 3. Silicone rubbers have fine electrical properties, good chemical stability and flame retardancy, and … Rubber tires are an essential part of a vehicle, the contact point between a car or truck and the road surface. The embrittlement point of typical organic rubbers is between -20° and -30°C, compared to -60° to -70°C for silicone rubbers. When you need a rubber material that offers excellent resistances to weather, heat, and other factors without breaking the bank, EPDM grommets, gaskets, tubing, and other parts may be the answer you need. Such coatings can also improve the chemical resistance of EPDM rubber. The rubber material of EPDM can reduce a property’s overall appeal. EPDMs are available in a range of molecular weights (indicated in terms of Mooney viscosity ML(1+4) at 125 °C), varying levels of ethylene, third monomer, and oil content. EPDM can be compounded to meet specific properties to a limit, depending first on the EPDM polymers available, then the processing and curing method(s) employed. EPDM seals can be a source of squeaking noise, due to movement of the seal against the opposing surface (and its attendant friction). EPDM is compatible with polar substances, e.g. Natural rubber is an excellent spring material. Pure Premium Natural Rubber is an outstanding abrasion,impact and corrosion resistant material. 2. They have good corrossive resistance. EPDM is made from ethylene, propylene, and a diene comonomer that enables crosslinking via sulfur vulcanization. Silicone rubber also has excellent resistance to cold temperatures. It’s also very flexible, with 600% elongation and a tensile range of 500-2500 psi, while functioning well in temperatures from -50 … There are two main types of rubber: natural rubber and synthetic rubber. Use this rubber chemical resistance chart to make sure that the elastomer or O-ring seal you choose will be compatible with the particular environment. Material properties: hyperelastic model for the rubber You have been given some experimental test data for the rubber material used in the mount. Curing is done at a high temperature, and helps create long-chain polymers connected by crosslinks. These capabilities make Viton a natural choice for parts that need to succeed in demanding environments. The earlier relative of EPDM is EPR, ethylene propylene rubber, that contains no diene units and can only be crosslinked using radical methods such as peroxides. Plastics can be moulded to any desired shape and size. Sulfur-cured EPDM is the least costly and provides better tear and abrasion resistance compared to peroxide-cured compounds. It is used to create weatherstripping, seals on doors for refrigerators and freezers (where it also acts as an insulator), face masks for industrial respirators, glass-run channels, radiators, garden and appliance hose (where it is used as a hose material as well as for gaskets), tubing, washers, O-rings, electrical insulation, and geomembranes. ASTM D2000-01 Grade M5CA714 A25 B35 C32 EA14 F17 G21, ASTM D2000-75 Grade5CA720 A25 B35 C32 L14 F17 G21. It is also used as a functional additive to modify and enhance the impact characteristics of thermoset plastics, thermoplastics, and many other materials.[9][10]. The inherent physical characteristics of elastomers can be modified through compounding. An important property of foam rubber is called the indentation load deflection, which measures the spring tension or load-bearing quality of the material. fireproof hydraulic fluids, ketones, hot and cold water, and alkalis. Rubber is constructed in different basic elastomers (polymers), according to the used polymer and the compound ingredients that are listed below in the table under properties. Chemical, Physical and Mechanical Property Charts To compare our most popular plastics by their physical properties please reference our Property Comparison Chart (PDF). With similar properties to silicone rubber below 250 degrees F, EPDM is resilient, has low electrical conductivity, and adheres easily to metals. Buna-N is the American term for Nitrile rubber, it is also known as: Butadiene Acrilonitrile, Perbunan or NBR rubber. The reason for the success of this synthetic rubber is, of course, its unique properties and diverse applications. T hink of rubber and you probably think of elastic bands, car tires, or pencil erasers. It is also resistant to ozone and weathering and in these respects it is much superior to Nitrile Rubber. It is an electrical insulator. This page has links to all data sheets in MatWeb for the tradename Neoprene. High energy radiation such as from electron beams is sometimes used for producing foams and wire and cable. Vulcanization. It’s also very flexible, with 600% elongation and a tensile range of 500-2500 psi, while functioning well in temperatures from -50 … Natural rubber is made from latex, which is produced by plants. As a durable elastomer, EPDM is conformable, impermeable and a good insulator. $21.38. This contrasts with the relatively high conductivity of carbon black (104– They have high electrical strength. EPDM is also used for components that provide elasticity; for example, it is used for bungee cords, elastic tie-downs, straps, and hangers that attach exhaust systems to the underfloor of vehicles (since a rigid connection would transfer vibration, noise and heat to the body). For the best experience on our site, be sure to turn on Javascript in your browser. Nitrile (Buna-N, NBR) top Nitrile rubber is the general term for acrylonitrile butadiene terpolymer. The reason for the success of this synthetic rubber is, of course, its unique properties and diverse applications. Natural rubber material is extracted from the Para rubber trees by cutting veins across the body of the tree and having the tree sap collected into coconut shells, which are usually used to hold the latex. There are many more physical properties of rubber than what are described here, but, we will limit them to the most common physical properties you will see in the ASTM D2000 standard. Producers. EPDM rubber (ethylene propylene diene monomer rubber) is a type of synthetic rubber that is used in many applications.. EPDM is an M-Class rubber under ASTM standard D-1418; the M class comprises elastomers having a saturated chain of the polyethylene type (the M deriving from the more correct term polymethylene). Contact the Rubber Experts at Fournier Rubber Today. [11], Learn how and when to remove this template message, "All Seals Inc. - The Sealing Specialists", "What is EPDM Rubber and Its Uses for Automotive? III. EPDM - Ethylene Propylene Diene Rubber . Natural Rubber Properties Natural rubber has flexibility and strength, as well as impurities and vulnerability to environmental conditions and hydrocarbons. With similar properties to silicone rubber below 250 degrees F, EPDM is resilient, has low electrical conductivity, and adheres easily to metals. The rubber materials selected by designers and technical buyers should meet all their application requirements. Also available for your reference: Chemical Resistance Chart UHMW Molecular Weight Viscosity Graph SDS (MSDS) Both Imperial and Metric Property Sheets are available below for all Redco™ Plastic Products: IMPERIAL … Buna-N/Nitrile Rubber. Even at temperatures at which organic EPDM is derived from polyethylene into which 45-85 wt% of propylene have been copolymerised to reduce the formation of the typical polyethylene crystallinity. First we will cover Hardness, Ultimate Tensile Strength, Elongation, Tensile … If you need EPDM properties that are different than the ones shown in the chart below, we can reformulate the compound of the EPDM material so that the EPDM rubber specifications suit your needs. Urethane's inherent abrasion resistance, excellent tensile and tear strength, and high load-bearing capacity make it ideal material for a range of tough applications. EPDM is a semi-crystalline material with ethylene-type crystal structures at higher ethylene contents, becoming essentially amorphous at ethylene contents that approach 50 wt%. As such, EPDM can be formulated to be resistant to temperatures as high as 150 °C, and, properly formulated, can be used outside for many years or decades without degradation. Sign up for our newsletter and receive periodic engineering tips on good seal desing practices. Rubber tires come in many styles--for instance, all-season radials and snow tires--and they come in varying quality and sizes. Rubber Sheet Properties Exposure to heat, sunlight, chemicals, ozone and oils, as well as pressure, tension, binding, stretching and folding will affect the performance of any rubber sheet product. Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. To enhance the properties of rubber, a process known as vulcanization is done. Here you will find our Ethylene Propylene rubber (EPDM) specifications chart which can also be downloaded in PDF. It is used as safety surfacing under playground play equipment (designed to help lessen fall injury). A common use is in vehicles, where EPDM is used for door seals, window seals, trunk seals, and sometimes hood seals. The key properties of Polyacrylic (ACM) are its resistance to hot hydraulic oil and oxidation. It is also used for cushioned edge guards and bumpers on appliances, equipment and machinery. Other than rayon, it is the sole raw material, which is used by the automotive industry. Viton® material properties .