i need to know information on synthetic rubber for a project at school.?
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Synthetic rubber\n\n\nAny artificially produced substance that resembles natural rubber in essential chemical and physical properties can be called synthetic rubber. Such substances are produced by chemical reactions, known as condensation or polymerization, of certain unsaturated hydrocarbons. The basic units of synthetic rubber are monomers, which are compounds of relatively low molecular weight that form the building units of huge molecules called polymers.\n\nThe origin of synthetic-rubber technology can be traced to 1860, when the British chemist Charles Hanson Greville Williams determined that natural rubber was a polymer of the monomer isoprene, which has the chemical formula CH2:C(CH 3)CH:CH2. Many efforts were made during the next 70 years to synthesize rubber in the laboratory by using isoprene as the monomer. Other monomers also were investigated, and during World War I (1914-1918) German chemists polymerized dimethylbutadiene (formula CH2:C(CH3)C(CH 3):CH2) producing a synthetic rubber called methyl rubber, which was of limited usefulness.\n\nTypes of synthetic rubbers:\nOne of the first successful synthetic rubbers resulting from Carothers's research was neoprene, which is the polymer of the monomer chloroprene, chemical formula CH2:C(Cl)CH:CH2. The raw materials of chloroprene are acetylene and hydrochloric acid. Developed in 1931, neoprene has high resistance to heat and such chemicals as oils and gasoline. Neoprene is used in hose for conveying gasoline and as an insulating material for cables and in machinery.\n\nBuna Type Rubber : Used in World War 2\n\nIn 1935 German chemists developed the first of a group of synthetic rubbers called Buna, which is produced by copolymerization—that is, the polymerization of two monomers, called comonomers. The name Buna is derived from the initial letters of butadiene, used as one of the comonomers, and natrium (sodium), which was used as a catalyst. One of these products, Buna-N, uses acrylonitrile (CH2:CH(CN)) as the other comonomer. Acrylonitrile is produced from cyanide. Buna-N is valuable for uses requiring resistance to the action of oils or abrasion.\n\nDuring World War II a Buna-type rubber called GR-S (Government Rubber-Styrene) was designated as the general-purpose rubber for the U.S. war effort. The basic rubber produced by the present-day U.S. synthetic-rubber industry, GR-S is a copolymer of butadiene and styrene. The various grades of GR-S are classified in two categories, regular and cold, depending on the temperatures of copolymerization. Cold GR-S types, which exhibit superior properties, are prepared at 5° C (41° F); regular GR-S types are prepared at temperatures of 50° C (122° F). Cold GR-S is used to make longer-wearing tires for automobiles and trucks.
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http://www.iupac.org/index_to.html\nIs a pretty handy resource.\nhttp://www.che.ufl.edu/www-che/\nI seem to recall being very useful as well.\nLet me know if these help.
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This might help :)\nhttp://www.chemicalforums.com/index.php?board=8;action=display;threadid=3263
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Some sources\n\nhttp://www.textileweb.com/content/homepage/default.asp\n\nhttp://www.tx.ncsu.edu/extension/service/appres/ar_overview.html (click on the different lab links)
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There are all kinds of different materials lumped under the generic heading of "plastics".  The variations run into hundreds, perhaps even thousands of compounds!\n\nFor example, there's nylon.  The most familiar form, nylon 66, is a copolymer of adipic acid or adipoyl chloride and hexamethylene diamine.  But I can substitue various hydrocarbon chains in those two components to make nylon 55, nylon 65, nylon 48, nylon 83, etc.\n\nThen there are the families of polyaramid polymers, and polyester polymers, and polycarbonates, and . . . .\n\nNobody will ever be able to give you an exhaustive list here.  Try looking up some books on polymer chemistry at your library.
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Rubber in contact with other surfaces can yield friction coefficients from 1.0 to 2.0.\n\nhttp://en.wikipedia.org/wiki/Friction
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Try www.miniscience.com  The website also gives you kits to buy.  Try www.scienceproject.com
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Try Edmund Scientific on the web..but if you want to make your own try the link provided.\n\nGood luck!
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Vulcanized rubber was invented in 1843, so it came first. Look up Charles Goodyear.
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You can find the general structures through simple web searches.  Remember some of these are polymers and can have different versions based on chain lengths and copolymers.
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Silica sand.\n\nhttp://www.publicbookshelf.com/public_html/The_Household_Cyclopedia_of_General_Information/howtomak_cge.html
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Try checking out www.engineering.com
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What is the hoses material?\nAcrylonite butadiene styrene (ABS)?\nPlastic (General)?\nPolyethylene?\nPolyvinly chloride (PVC)?\n\nYou Should look to the Hazen-Williams Friction Loss Equation
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Here are a few readable sites on polymers, hope you find your answers
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www.carolina.com/STC/living_materials/vinegar_eels.asp\n\nwww.members.optushome.com.au/chelmon/vinegar.htm\n\nhere you go i hope this is good enough and good luck on your project
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www.activated-carbon.com\nthis website should help
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Mostly carbon and hydrogen.\nNatural rubber is a polymer of isoprene, a 5-carbon diene (has two double bonds).  It is not perfectly stable towards oxygen and especially with sunlight, hence, it degrades over time and becomes brittle.  When it's good and new though - C and H.