Elastomers and its properties natural rubber nr, ir cis 1, 4 polyisoprene produced from latex of heveabrasiliensis tree tg. It can be considered as a good general purpose rubber with an excellent balance of physical and chemical properties. We can customize compounds to meet your physical requirements or we have a library of compounds developed through over 60 years of business. A rheometer is used for those fluids which cannot be defined by a single value of. Typically, a small percentage of other materials including proteins, fatty acids, resins, and inorganic materials are found in natural rubber. Rubber properties, rubber mechanical properties, oring. It is a variety of natural rubber available in north america. Natural rubber and synthetic rubber preparation and properties. Aflas can be crosslinked cured using a variety of systems, but generally peroxides are used to provide the best all around environmental resistance. Types of rubber and basic properties all seals inc. One is shore a hardness a nd the other is shore oo hardness.
Please use one of the following formats to cite this article in your essay, paper or report. Natural rubber is produced from the latex milky juice of the hevea brasiliensis tree. Natural rubber, also called by other names of india rubber, latex, amazonian rubber, caucho or caoutchouc, as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds, plus water. Chapter12 uses ofscraprubbertires 477 hingho tsang chapter modelingand simulationofnanofilledcrosslinkedrubberusing coarsegrainedmoleculardynamics 493 hiromasayagyn chapter 14 isocyanatepriming ofvulcanizedrubber 509 m. As you can read in this sections pages, selecting the right material for a seal is crucial. Here you will find a rubber properties chart for all popular rubber materials. Rubber is a natural polymer of isoprene 2methyl 1, 3 butadiene. Physical properties of rubber a buyer and designers guide. Brief description of the various rubber processes and ingredients used for the preparation of the final. Properties, behavior and uses natural rubber nr is the most often used rubber in the industry. Thailand and indonesia are two of the leading rubber producers. Elasticity is one of the fundamentally important properties of natural rubber.
Thermal vulcanization typically uses peroxides to crosslink at the. The various types of rubber materials are given as natural rubber, synthetic rubber and hard rubber. It is extracted in the form of latex from the bark of the hevea tree. All seals stocks virtually every seal product you need in virtually every material. In the rubber industry, this technique is used by large rubber processors for example, in roof sheeting and cable production. Very good resistance to fuels, oils and greases very good resistance to ageing, weathering, uv and ozone good heat. The most common properties of rubber are its elasticity, resistance to water and its use as an electrical insulator. Its also tough tires, resists water and chemicals gloves, elastic rubber bands and much more. Rubber types and uses graham rubber company limited. Oring material quick reference guide rubber sealing materials. The most important synthetic rubber is styrenebutane rubber. Chloroprene tends to slowly absorb water and its electrical properties are poor.
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. Types, properties and uses materials science and technologies doc, djvu, epub, pdf, txt forms. It was found that the nr compound containing high structure black, i. It is polymeric material along with high elastic yield strain. The standard product range comprises at present approximately 700 different formulas that are constantly being improved and expanded. Use of shore hardness tests for inprocess properties. Rubber material selection guide epdm or ethylene propylene. Natural and synthetic rubber phoenix compounding technology gmbh is specialized in the sales of rubber compounds for the most varied of applications. Properties of rubber polymer base good points bad points natural rubber the raw material to make natural rubber comes from trees produces compounds with high tensile strength, tear strengt h, tear and abrasion resistance.
Nr is a polymer of cisisoprene units linked together at 14 positions. The epdm properties that are listed below are for our most popular epdm 70 durometer 70a rubber material. There are various types of durometer, instrument to measure the hardness of a material, depending on the property of the. Types, properties and uses materials science and technologies, in that case you come on to right site. These are the elastomers which are obtained naturally. Gym rubber products are based similarly to the neoprene types, with a butadiene rubber formula, but including nitriles as well nbr. The hindu explains that wires that are in danger of touching each other are covered with insulated coatings, made from rubber, to prevent short circuits from happening. It is, therefore, a renewable resource unlike synthetic rubber, which is manufactured from petrochemicals. Mechanical properties and durability of natural rubber. Types of polyisoprene that are used as natural rubbers are classified as elastomers. Ozone and weathering resistance is also excellent and electrical properties are good. The natural rubber polymer is nearly 100% cis1,4 polyisoprene with. The inherent physical characteristics of elastomers can be modified through compounding. Ep is a copolymer of ethylene and propylene, while epdm is a terpolymer combining ethylene, propylene and a diene monomer.
During a measurement, a dead weight is used on the top of the durometer indenter, 1. Only some significant difference is observed at very low shear rate frequency on tangent. Use the rubber comparison chart to find the most economical seal. After the latex is processed, it becomes an elastomer with excellent mechanical properties. Hypalon rubber chlorosulphonated polyethylene csm, widely known as hypalon, can in some respects be regarded as a superior type of chloroprene, having better heat ageing, chemical resistance and excellent low gas permeability. Rubber compounding is a very broad and technical field, since basic rubbers or elastomers are mixed with various chemicals and ingredients and even with each other to obtain desired physical properties. The materials foam factory stocks are polyvinylchloride nitrilebutadienerubber, or pvcnbr. As a contract manufacturer of rubber materials with over 50 years of experience, advanced rubber products has worked with clients on a wide range of products. Several studies have been carried out to reuse scraptires in a variety of rubber and plastic products, incineration for production of electricity. Not suitable for the absorption of large impact energy because its tensile strength and elongation are weaker than that of urethane of the same hardness. The paper details the likely uses of rubberized concrete.
The fine properties of silicone rubber perfect for an incredible array of applications. Offers information about natural rubber industry, history of natural rubber, natural rubber products, information on natural rubber, natural rubber history, uses of natural rubber, properties of natural rubber, natural rubber goods, natural rubber manufacturers, natural rubber suppliers, natural rubber exporters. Ren school of engineering, technology and maritime operations, liverpool john moores university, liverpool,uk email. Standard test methods for rubber properties in compression1 this standard is issued under the. Its widespread use is, however, impeded by the high investment costs.
The maximum torque for all the compounds tested in this study varies from 12. These dense, flexible forms of foam rubber have many applications beyond their athletic flooring uses. Properties of urethane and high performance urethane rubber properties characteristics. Martins rubber explain the advantages of natural rubber. Basic elastomers properties eriks tools chemical resistance guide oring calculator unit converter bellow selector rubber profile price calculator anti vibration selector.
Natural rubber, natural rubber properties, natural rubber. Common name neoprene natural polyisoprene butyl chlorinated butyl buna n sbr hypalon vamac ethylene propylene rubber polyethylene teflon crosslinked polyethylene modified crosslinked polyethylene composition name chlorprene. This combination of unique properties gives rubber its specific applications like seals, shock absorbers. Two types of sheet rubber are produced and marketed in the international market, namely the ribbed smoked sheets rss and the air dried sheets ads. Ortizmagan chapter 15 steamthermolysis oftechnicalrubbermaterial 531 henadzzhurauski, vitali zhdanok, nikolaipavlukevich. It has the same properties as urethane, and excels in shock absorption.
Electrical engineering assignment help, discuss important properties and uses of rubber, discuss important properties and uses of rubber. Natural rubber combines high strength tensile and tear with outstanding resistance to fatigue. This study aims to investigate the effect of carbon black structures on the mechanical properties of industrial tyre rubber compounds containing natural rubber nr and styrene butadiene rubber sbr. Nbr rubber,nitrile rubber properties,applications of nbr. Mechanical properties of industrial tyre rubber compounds. We have extensive knowledge of rubber manufacturing and create. Manufacturers prize scrap tires and rubber as a raw material input due in part to cost and energy savings. Our experienced staff works with you to determine what type of rubber works best for your application. Following is the list of nitrile rubber properties. A study on effect of addition of natural rubber on the.
Recycled rubber is being used by manufacturers in a wide variety of applications today. Very good resistance to fuels, oils and greases very good resistance to ageing, weathering, uv and ozone good heat resistant better low temperature. Use of shore hardness tests for inprocess properties estimationmonitoring of silicone rubbers h. Oring material family chemical compatibility, temperature resistance, and other properties all factor in to oring material selection for an application. A number in parentheses indicates the year of last reapproval. As the name would indicate, this elastomer occurs naturally and comes from the latex of certain trees and plants. We have extensive knowledge of rubber manufacturing and create products based on our customers specialty molding needs. The rubber is collected from the latex in a series of steps involving preservation, concentration, coagulation, dewatering, drying, cleaning, and blending. Several studies have been carried out to reuse scraptires in a variety of rubber and plastic products, incineration for production of electricity, or as fuel for cement kilns, as well as in asphalt concrete.
Natural rubber is composed of the polymer polyisoprene. Named for its property as an eraser to rub out pencil marks, rubber is widely used. Bulletin of the transilvania university of bra sov vol. The evaporation of moisture leaves pores which result in sponge rubber. Rubber material reference, neoprene, epdm, bunan, silicone. There are two basic types of ep rubber available in todays marketep and epdm. When raw rubber is heated, it becomes sticky, and when it is in colder temperatures, it tends to break, just like the synthetic variety. Synthetic rubber refers to the elastic polymers from which rubber is made and produced on the basis of petrochemical raw materials. Different carbon black structures were used and characterised with respect to their rheological and physical properties. Characteristic properties of silicone rubber compounds shinetsu.
Rubber is also waterresistant and is used as a seal around waterproof cellphone cases. Nitrile rubber can generally be used down to about 30c but special grades of nbr can work at lower temperatures too. Rubber types, properties and uses request pdf researchgate. This rubber materials comparison chart gives you key factors in your choice of rubber mechanical properties. It is made up of solids particles suspended in milky white liquid, called latex that drips from the bark of tropical and subtropical trees. Introduction to uses of synthetic rubber rubber is a material used to make various useful accessories in everyday life. Speak with us to help you choose the best product for your application.
Engineering sciences mechanical properties of rubber an overview al. Rubber, its history, properties, and applications dtic. This popular oring material family comparison shows basic rubber material family properties and performance plastic properties. Dec 01, 2011 gym rubber products are based similarly to the neoprene types, with a butadiene rubber formula, but including nitriles as well nbr. Graham rubber is happy to help our customers identify which material will be most suitable for each application. Among these two types, ribbed smoked sheet is the most popular and is available for consumption. Standard test methods for rubber properties in compression. It has better chemical, oil, ozone and heat resistance than natural rubber but a rather lower level of physical properties. Types, properties and uses find, read and cite all the research you need on. Types of rubber holz rubber company uses varying rubber. It is used as a heat and sound insulating material. Types, properties and uses request pdf researchgate. This remarkable combination of properties is the reason elastomers serve a vast number of engineering needs in fields dealing with sealing, shock absorbing, vibration damping, and electrical and thermal insulation. However, the knowledge of rubbers physical properties and their measurement is critical for compound selection.
While polyisoprene can also be made synthetically, producing what is known as synthetic natural rubber. In recent years, the production of elastomeric blends has markedly increased, due to their well balanced physical and mechanical properties, easy processability and relatively low cost. Natural rubber has elastic properties and it undergoes long range reversible extension even if relatively small force is applied to it. The primary uses for aflas are in parts for oil drilling equipment. Properties of rubber elastomer properties custom advanced. Protect, insulate and sealing properties absorb vibration and silence noise available in any surface roughness and shape to achieve the specific properties required for a given product, raw natural rubber has to be compounded using ingredients such as carbon black, antidegradants, softeners and a vulcanization system. Properties of natural rubber natural rubber has certain unique properties such as follows. With more resistance to compression than normal urethane, it is hard to deform. It is prepared by adding sodium bicarbonate during the process of vulcanisation. Conservation and art materials encyclopedia online at cameo. The rubber materials selected by designers and technical buyers should meet all their application requirements. The tensile strength may be considered either separately or together with the modulus and elongation in defining an optimum state of cure for any specific compound. We have a developmental lab and a fulltime chemist.
Elastomers have a variety of properties such as hardness, tensile strength, and elongation. Rubber is bouncy, sure, but thats just the start of its numerous properties. The type of br used depends on which properties are most. The types, qualities, and benefits of foam rubber products.
The chart below is intended to help in the material selection stage of designing rubber parts products. The materials foam factory stocks are polyvinylchloride nitrilebutadiene rubber, or pvcnbr. Aem exhibits properties similar to those of polyacrylate acm, but with extended low temperature range and with enhanced mechanical properties. Epdm 70, epdm rubber, epdm material, epdm properties. Selecting the right polymer base is important to each project. Rubber is also a good electrical insulator, and can be used as a bonding agent.
The natural rubber latex products are wide and varied like gloves, balloons, tubes, condoms etc. There are two types of rubber natural rubber and synthetic rubber. Silicone rubber compounds have characteristics of both inorganic and. Mechanical properties and durability of natural rubber compounds and composites joseph thomas south abstract the focus of this research was to investigate the effect of thermal degradation upon the mechanical properties of natural rubber compounds and apply those effects to the life prediction of off axis 2ply cord rubber laminates. Jul 06, 2004 but while in its natural state the material is biodegradable, the extensive processing that it undergoes tyres use rubber mixed with synthetic substances such as plastics and chemical curatives to ensure that, when cars reach high speeds, burning rubber is a theoretical description rather than a frightening reality renders rubber much more durable, and is therefore a major recycling. Properties of rubber styrene butadiene sbr o riginally developed as a low cost substi tute for natural rubber but not necessarily always the case good water resistance and a brasion resistance maximum continuous operating temperature about 225 f p oor weathering, but can overcome with specific raw materials. Those characteristics define its nature and determine its uses. It also covers processing of recycled rubber and applications of waste rubber. This includes a full complement of rubber, machined plastics and standard materials. Hypalon 40 synthetic rubber is considered the basic general purpose chlorosulfonated polyethylene elas tomer, having a good balance of processibility and. To enhance the properties of rubber, a process known as vulcanization is done. Epdm 70, epdm rubber, epdm material, epdm properties mykin inc. Uses include seals in pharmaceutical and chemical intensive industries having trouble deciding.
25 262 535 1060 1366 363 5 648 1105 44 1026 1133 761 260 1235 1378 1074 1309 967 117 1261 400 1345 906 296 340 333 1435 1197 86 1453 201 237 593 1046 534 602 324 997 983 831 1400 971 1064 465 429 594 624