Elastomers fall into natural groups according to their heat and oil resistance. Rubber natural rubber was first introduced to europe in the mid. Epdm compounds are not recommended for gasoline, petroleum oil. Conductive elastomers are reliable over the life of the equipment. The softest materials solving your hardest problems beyond the materials, finding a good partner in a tpe supplier makes a difference with technical support, regulatory knowhow and geographic reach.
Elastomers chemical compatibility chart ver 19dec2018 it is the sole responsibility of the system designer and user to select products suitable for their specific application requirements and to ensure proper. This formulation recipe influences the finished parts function, service life and. Elastomers made with converge d25120, a 200 mw diol with approximately 50% ppc and 50% ppg, were flexible materials. Polymers and elastomers a polymer is the result of a chemical linking of molecules into a long chainlike structure. Acrylonitrile butadiene rubber nbr, usually shortened to nitrile, is a unique elastomer. As nouns the difference between rubber and elastomer is that rubber is uncountable pliable material derived from the sap of the rubber tree.
Elastomers applications global elastomeric products. Every day, we depend on a wide variety of products and materials to go about our daily lives, many of which we barely notice. Polymers which have the property of elasticity are called elastomers. Elastomers are the rubber materials used in the diaphragms, seats, and orings of control valves, regulators, temperature controllers, and most oil and gas control equipment. The ratings were developed from specific data or general agreement of the sources identified in the corresponding table enclosed.
What is elastomer and properties of elastomer notes pdf ppt. Both natural and synthetic rubbers are considered to be elastomers. Using advanced materials, these elastomers provide superior performance relative to other elastomer materials. Elastomer, any rubbery material composed of long chainlike molecules, or polymers, that are capable of recovering their original shape after being stretched to great extentshence the. Rubber fab technologies group was founded in 1995 by robert dupont, sr. Introduction to dynamic mechanical testing for rubbers and. An elastomer with a cc double bond along the main chain is an relastomer, whereas. Threshold tear strength of elastomers gent 1982 journal. Elastomer materials are those materials that are made of polymers that are joined by chemical bonds.
The elastomers used in our bearings conform to state andor aashto specifications for bearings. Technical manager, bu elastomers kuraray europe gmbh, hattersheim, germany. Compatibility of lubricants with elastomers and plastics. Fundamental properties of elastomers elastomers are based on polymers which have the property of elasticity. After the latex is processed, natural rubber becomes an elastomer with excellent mechanical properties. Rubbers and elastomers smart and flexible support for rubber and elastomer research and production. List of common elastomers and brief descriptions page 2 aflas is a 75 durometer high temperature resistant copolymer of tetrafluoroethylene and propylene. Novel thermoplastic elastomers with universal bonding. Experimental determination of compression modulus according to the standard of elastomers compression test, astm d 39503, the standard dimensions of a specimen are. Daniels university of akron akron, ohio 44325 jay j. An elastomer is a polymer with the property of elasticity, generally having notably low youngs.
Standard test method for rubber propertydurometer hardness1. The ratings are based for the most part, on published literature of various polymer suppliers, rubber manufacturers, and in some cases, the considered opinion of experienced compounders. Thermoplastic elastomers tpes are the premier choice of soft, elastomeric materials for appliance designers and engineers. The structure and characteristics of most typical rubber and thermoplastic elastomers will be. This chart is offered as a general guide, including the suitability of various elastomers for service in these chemicals and fluids. Elastomers are longchain polymers which are capable of crosslinking which is referred to as vulcanization. Elastomers selection guide corry rubber corporation. Crude natural rubber is found in the juices of many plants shrubs, vines, and trees, the principal of which is the hevea brasiliensis tree, native to brazil. Though small in size, elastomers play a critical role in the oil and gas production.
They exhibit higher hardness and tensile properties than ppg polyol while retaining high flexibility. Generally, below 5 to 10 percent swell is considered excellent. Apr 24, 2001 in the context of rubbers and elastomers modulus refers to this rubber property. By 1990, twothirds of world rubber production consisted of synthetic varieties. They are available as liquid castable materials and as solid millable gums. Generating pdf files to provide a universal format for exchanging drawings, adobe portable document format. A problem was that matural rubber is a very weak, soft thermoplastic when heated but very brittle when cold. Functionalized liquid polyisoprene magazine for the polymer. Elastomeric fibers are those fibers that possess extremely high elongations at break and that recover fully and rapidly from high elongations up to their breaking point. It can be produced by freeradical emulsion polymerization of butadiene with 15 to 45 percent acylonitrile either hot hot rubber or cold cold rubber. Standard test methods for vulcanized rubber and thermoplastic elastomers tension1 this standard is issued under the. The naming of elastomers distinguishes the various chemical structure of the main chain. Elastomer selection considerations chapter b1 page 1 contact kalsi engineering search this handbook 1. Laurence mckeen, in the effect of sterilization on plastics and elastomers third edition, 2012.
Material properties of three candidate elastomers for space seals applications marta b. Many types of elastomers and rubber materials are available. Tear strengths have been measured for a wide variety of molecular networks under threshold conditions. Elastomers are rated for compatibility with various media including fluids, weather and ozone. Elastomer nr natural rubber nr used to be the finest of all elastomers. Nitrile butadiene latex nbr latex hydrogenated nbr hnbr in their simplest form, nitrile elastomers are copolymers of an unsaturated nitrile acrylonitrile and a conjugated diene. Both compounds are oilresistant and exhibit superior results at low and. Malvern panalytical assists research, development and routine testing of natural rubber products as well as synthetic elastomers through a wide range of technologies. Technical reference bulletin properties of common elastomers fluoro silicone nr sbr iir epdm cr nbr vmqsi fkm, fepm fvmq au or eu aa aa aa da bc bg gefe hk fk bg 2090 4090.
Elastomers test procedure the criteria for the ratings of various elastomers presented here natural rubber, sbr, and epdm were primarily volume swell resistance, compression set resistance, and aging resistance. An elastomer is a polymer with the property of elasticity, generally having. General properties of elastomers summary chart the chart below provides general information for various common elastomeric compounds and very general features of the. Both plastics and elastomers are classified as polymers. In some cases, a variety of elastomers may be acceptable in a given application. Technical reference bulletin properties of common elastomers. A lubricant can penetrate the sealing material and may influence the performance of the. Introduction1 selecting an elastomer for a rotary shaft seal requires evaluation of. Pu rubbers, vulcanizable via dimerized tdi, to produce wear and tearresistant roll coverings. These files are not visible in the user interface, but can be viewed by opening the pdf file from the solidworks workgroup pdm addin in an acrobat reader. Those above the dotted line are recommended for elevated temperatures. The enclosed data might then serve as a quick reference for determining possible swelling of the referenced elastomers in reservoirs known to contain co 2. Novel thermoplastic elastomers with universal bonding characteristics dr.
Elastomers are materials of a very high molecular weight, generally composed of one or more monomers polymerised or copolymerised together to form a polymer or copolymer. Our wide range of tpes combine many of the performance properties of thermoset rubber with the processing ease of plastic thereby providing design options and greater costreduction opportunities. Use of polybutadiene coagents in peroxide cured elastomers for wire and cable. Thermoplastic elastomers can be prepared by creating blends of an elastic polymer with a dimensional stabilizing polymer 68 and enhance thermalmechanical properties. Elastomer rubber polymer plastics acrylate rubber chloroprene rubber chlorosulphonated pe rubber ethylenepropylenediene rubber. Handbook of thermoplastic elastomers, second edition presents a comprehensive working knowledge of thermoplastic elastomers tpes, providing an essential introduction for those learning the basics, but also detailed engineering data and best practice guidance for those already involved in polymerization, processing, and part manufacture. Nitrile elastomers chemical economics handbook ceh. Elastomer definition, properties and examples of elastomer. Material properties of three candidate elastomers for space. Elastomers overview chemical economics handbook ceh. Polymer is the main component, and determines heat and chemical resistance, as. Final selections should be based on tests using samples of the elastomers chosen. Introduction we are all familiar with the very useful properties of such objects as rubber bands, solid rubber balls. Rubber fabs first product that went to market was the smart gasket and the business has been growing ever since.
A number in parentheses indicates the year of last. Compositions of isoprene and halogenated epdm rubbers. Rubber and elastomer are words commonly used to mean any material with rubberlike properties. A process, vulcanisation, was invented by goodyear, where rubber heated. The idea of this part of the virtual education in rubber technology course is to give students an extensive overview of elastomeric materials. Typical properties of common elastomers rubber compounds general chemical resistance33 common names55 deesiggnnation22 ccoommposittion general pprroperties11 resistent.
Elastomer definition is any of various elastic substances resembling rubber. Urethane elastomers are combinations of either polyesters or polyethers and diisocyanates. In an epdm vault view inside windows explorer, the data card tab is used to view those properties by displaying the data card associated with the file. Chemical resistance of elastomers 300 martinel drive kent, oh 44240 phone.
Elastomers and rubber compounding materials paperback january 1, 1989. Elastomers chemical compatibility chart ver 19dec2018 it is the sole responsibility of the system designer and user to select products suitable for their specific application. They are made up of long chains of atoms, mainly carbon, hydrogen and oxygen, which have a degree of crosslinking with their neighbouring chains. It is a natural product made from the juices of a tropical plant latex, but for industrial applications nowadays. Elastomers copied to clipboard we provide a wide range of highperformance raw materials for superior cast polyurethane elastomers along with professional, customized support based. The same gasket is both an emi shield and an environmental seal. During the past 51 years at elastomer engineering our fully equipped laboratory has developed and tested a huge range of rubber compounds which include iso, dtd and astm standards, we currently have over formulations on our database. Elastomer definition of elastomer by merriamwebster. Typical properties of common elastomers rubber compounds. These compounds also withstand the affects of brake fluids, alkali, mild acidic and oxygenated solvent environments.
Their minimum physical characteristics are as shown in table 2. Elastomer selection considerations kalsi seals handbook. Gls international, rilland, netherlands gls corporation, 833 ridgeview drive, mchenry, il 60050 tel. General properties of elastomers elastomer page butyl 2 epdm ethylenepropylenediene modified 3 natural rubber 4 neoprene 5 nitrile bunan 6 polyisoprene 7 sbr styrene butadiene 8 silicone 9 summary chart 10. Elastomers in the hot sour gas environment by hertz, jr. Elbex cannot guarantee its accuracy nor assume any responsibility for its use thereof. Steinetz national aeronautics and space administration. In solidworks, files are capable of taking on both custom file properties and configuration specific file properties. Polarite 503s polarite 503s is a calcined kaolin treated with a vinyl functional silane for use with peroxide and other free radical crosslinking systems. In a fluid environment elastomers may swell, react chemically with the fluid causing changes in the polymer structure, or solubles may be extracted causing a decrease in volume.
Selecting the right elastomer is key to keeping your production running smoothly. General properties of elastomers elastomer page butyl 2 epdm ethylenepropylenediene modified 3 natural rubber 4 neoprene 5 nitrile bunan 6 polyisoprene 7 sbr styrene. Simmons pacific northwest national laboratory, richland, wa. Thermoplastic elastomers engineered thermoplastic elastomers tpes, are one of the most versatile plastics available today. Incorporation of polarite 404s product in silicone elastomers may provide substantial economical benefits with partial replacement of primary fillers. Elastomers are made up of long chains of atoms, mainly carbon, hydrogen and oxygen. Elastomers and lubricants in contact may interrelate with each other. In other words, it is a polymer that deforms under stress and returns to its original shape when the stress is. Specialty elastomers fill an evergrowing demand for hightech components for use in difficult environments that. Elastomer rubber compounds are made from five to ten ingredients, each ingredient playing a specific role. Mar 12, 2020 pdf by email single user license usd 4000 pdf by email corporate use license usd 8000. Equation of state and molecular structure objective to determine the macroscopic thermodynamic equation of state of an elastomer, and relate it to its microscopic molecular properties. Materialselectionforindustrialthermoplasticselastomers. An elastomer is a polymer with the property of elasticity.
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