Examples of thermoplastics include acrylic, nylon, Teflon, polypropylene, polycarbonate, ABS, and polyethylene. { bidder: 'openx', params: { unit: '539971063', delDomain: 'idm-d.openx.net' }}, const customGranularity = { { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, googletag.pubads().enableSingleRequest(); },{ { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_leftslot_160x600' }}, dfpSlots['btmslot_a'] = googletag.defineSlot('/2863368/btmslot', [[300, 250], 'fluid'], 'ad_btmslot_a').defineSizeMapping(mapping_btmslot_a).setTargeting('sri', '0').setTargeting('vp', 'btm').setTargeting('hp', 'center').addService(googletag.pubads()); pbjs.que = pbjs.que || []; Improve your vocabulary with English Vocabulary in Use from Cambridge.Learn the words you need to communicate with confidence. { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_MidArticle' }}, dfpSlots['topslot_a'] = googletag.defineSlot('/2863368/topslot', [], 'ad_topslot_a').defineSizeMapping(mapping_topslot_a).setTargeting('sri', '0').setTargeting('vp', 'top').setTargeting('hp', 'center').addService(googletag.pubads()); There appears to be no correlation between the fitted relaxation time and the. googletag.pubads().setTargeting('cdo_alc_pr', pl_p.split(",")); La fabrication d'une éolienne fait intervenir le moulage de composites résines / renforts. { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot' }}]}, Click on a collocation to see more examples of it. When nitrocellulose was treated with camphor, it produced celluloid, a polymer widely used in the film industry and as a moldable replacement for ivory. Define polymer. iasLog("exclusion label : wprod"); 8. { bidder: 'sovrn', params: { tagid: '346688' }}, See more. Polymer Chemistry: Isomerism Last updated; Save as PDF Page ID 2906; Contributed by David Whisnant; Professor (Chemistry) at Wofford College; Structural Isomerism; Sequence Isomerism (Head-to-Tail or Head-to-Head) Stereoisomerism (Tacticity) Contributors and Attributions; It is a general rule that for a polymer to crystallize, it must have highly regular polymer chains. { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_MidArticle' }}, { bidder: 'sovrn', params: { tagid: '446381' }}, {code: 'ad_leftslot', pubstack: { adUnitName: 'cdo_leftslot', adUnitPath: '/2863368/leftslot' }, mediaTypes: { banner: { sizes: [[120, 600], [160, 600]] } }, }; { bidder: 'ix', params: { siteId: '195464', size: [160, 600] }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_btmslot' }}, type: "cookie", googletag.pubads().addEventListener('slotRenderEnded', function(event) { if (!event.isEmpty && event.slot.renderCallback) { event.slot.renderCallback(event); } }); While thermoset plastics form irreversible chemical bonds when cured, the bonding in thermoplastics weakens with temperature. pbjs.setConfig(pbjsCfg); }); "loggedIn": false iasLog("criterion : sfr = cdo_dict_english"); { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_HDX' }}, window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date; }, { bidder: 'appnexus', params: { placementId: '19042093' }}, "authorization": "https://dictionary.cambridge.org/auth/info?rid=READER_ID&url=CANONICAL_URL&ref=DOCUMENT_REFERRER&type=ENTRY_TRANSLATE&v1=english&v2=polymer&v3=&v4=english&_=RANDOM", { bidder: 'appnexus', params: { placementId: '11653860' }}, Add the power of Cambridge Dictionary to your website using our free search box widgets. Les polymères (étymologie : du grec polus, plusieurs, et meros, partie) constituent une classe de matériaux. Polymer definition is - a chemical compound or mixture of compounds formed by polymerization and consisting essentially of repeating structural units. "authorizationFallbackResponse": { { bidder: 'sovrn', params: { tagid: '705055' }}, enableSendAllBids: false, We can go further and say that they are "alternating co-polymers" because the two different monomers alternate with each other along the chain. { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, {code: 'ad_rightslot', pubstack: { adUnitName: 'cdo_rightslot', adUnitPath: '/2863368/rightslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, "error": true, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '1666926', position: 'btf' }}, } Translation for 'polymer chemistry' in the free English-French dictionary and many other French translations. { bidder: 'ix', params: { siteId: '555365', size: [160, 600] }}, {code: 'ad_topslot_b', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[728, 90]] } }, Examples of thermoset plastics include epoxy, polyester, acrylic resins, polyurethanes, and vinyl esters. 'max': 36, ga('create', 'UA-31379-3',{cookieDomain:'dictionary.cambridge.org',siteSpeedSampleRate: 10}); var mapping_rightslot = googletag.sizeMapping().addSize([746, 0], [[300, 250]]).addSize([0, 0], []).build(); { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, { bidder: 'ix', params: { siteId: '195467', size: [320, 50] }}, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162050', zoneId: '776358', position: 'atf' }}, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776156', position: 'atf' }}, googletag.pubads().set("page_url", "https://dictionary.cambridge.org/dictionary/english/polymer"); var mapping_topslot_a = googletag.sizeMapping().addSize([746, 0], []).addSize([0, 550], [[300, 250]]).addSize([0, 0], [[300, 50], [320, 50], [320, 100]]).build(); { bidder: 'ix', params: { siteId: '555365', size: [120, 600] }}, Biopolymers serve key functions in organisms, acting as structural proteins, functional proteins, nucleic acids, structural polysaccharides, and energy storage molecules. { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}]; German chemist Friedrich Ludersdorf (1801–1886) and American inventor Nathaniel Hayward (1808–1865) independently found adding sulfur to natural rubber helped keep it from becoming sticky. {code: 'ad_topslot_b', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[728, 90]] } }, { bidder: 'sovrn', params: { tagid: '446381' }}, 'cap': true The award, presented every other year by the American Chemical Society's division of polymer chemistry, was bestowed in recognition of his accomplishments of unusual merit in the field of applied polymer science. "sign-in": "https://dictionary.cambridge.org/auth/signin?rid=READER_ID", Page . iasLog("criterion : cdo_ptl = entry-lcp"); { bidder: 'ix', params: { siteId: '555365', size: [160, 600] }}, dfpSlots['leftslot'] = googletag.defineSlot('/2863368/leftslot', [[120, 600], [160, 600]], 'ad_leftslot').defineSizeMapping(mapping_leftslot).setTargeting('sri', '0').setTargeting('vp', 'top').setTargeting('hp', 'left').addService(googletag.pubads()); { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot' }}]}, Full papers. Natural polymers have been used since ancient times, but mankind's ability to intentionally synthesize polymers is a fairly recent development. expires: 60 type: "html5", { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}]; bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776160', position: 'atf' }}, { bidder: 'onemobile', params: { dcn: '8a9690ab01717182962182bb50ce0007', pos: 'cdo_btmslot_mobile_flex' }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, By using ThoughtCo, you accept our, Plastic Definition and Examples in Chemistry, Biological Polymers: Proteins, Carbohydrates, Lipids, A Brief History of the Invention of Plastics, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. { bidder: 'openx', params: { unit: '539971066', delDomain: 'idm-d.openx.net' }}, { bidder: 'appnexus', params: { placementId: '11654156' }}, { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_btmslot_300x250' }}, She has taught science courses at the high school, college, and graduate levels. These mannose polymers are a form of storage carbohydrate that is mobilized following germination. { bidder: 'ix', params: { siteId: '195464', size: [160, 600] }}, iasLog("criterion : cdo_pt = entry"); { bidder: 'openx', params: { unit: '539971080', delDomain: 'idm-d.openx.net' }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, In larger proteins, the inside and outside behave as. googletag.pubads().setTargeting("cdo_dc", "english"); Chemistry Chemical Laws Basics Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids … { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}, { bidder: 'sovrn', params: { tagid: '387232' }}, { bidder: 'appnexus', params: { placementId: '11654149' }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_rightslot2' }}, { bidder: 'openx', params: { unit: '539971080', delDomain: 'idm-d.openx.net' }}, Polymer Chemistry Communications contain novel scientific work of such importance that rapid publication is desirable. { bidder: 'ix', params: { siteId: '195451', size: [320, 50] }}, {code: 'ad_btmslot_a', pubstack: { adUnitName: 'cdo_btmslot', adUnitPath: '/2863368/btmslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, En savoir plus. 11. name: "unifiedId", ga('send', 'pageview'); Add polymer to one of your lists below, or create a new one. ga('require', 'displayfeatures'); iasLog("criterion : cdo_pc = dictionary"); Une macromolécule constituée d'un enchaînement d'un … googletag.pubads().setTargeting("cdo_c", ["science_geographic_locales"]); 2 Natural Polymers Three types of natural polymers are polysaccharides, proteins, and nuclei acids. bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162050', zoneId: '776358', position: 'atf' }}, {code: 'ad_btmslot_a', pubstack: { adUnitName: 'cdo_btmslot', adUnitPath: '/2863368/btmslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, Polymer… Polymers synonyms, Polymers pronunciation, Polymers translation, English dictionary definition of Polymers. // FIXME: (temporary) - send ad requests only if PlusPopup is not shown A polymer is a large molecule made up of chains or rings of linked repeating subunits, which are called monomers. Curing is a chemical process employed in polymer chemistry and process engineering that produces the toughening or hardening of a polymer material by cross-linking of polymer chains. {code: 'ad_rightslot2', pubstack: { adUnitName: 'cdo_rightslot2', adUnitPath: '/2863368/rightslot2' }, mediaTypes: { banner: { sizes: [[300, 250], [120, 600], [160, 600]] } }, {code: 'ad_rightslot2', pubstack: { adUnitName: 'cdo_rightslot2', adUnitPath: '/2863368/rightslot2' }, mediaTypes: { banner: { sizes: [[300, 250], [120, 600], [160, 600]] } }, Definition of polymer in English Dictionary; Nom PL polymers PRE poly-SUF-mer +-(organic chemistry) A long or larger molecule consisting of a chain or network of many repeating units, formed by chemically bonding together many identical or similar small molecules called monomers. { bidder: 'openx', params: { unit: '539971079', delDomain: 'idm-d.openx.net' }}, The vulcanization of rubber was another big achievement in polymer chemistry. { bidder: 'appnexus', params: { placementId: '11654149' }}, { bidder: 'ix', params: { siteId: '195467', size: [320, 100] }}, chemistry. Le terme polymère désigne une molécule de masse moléculaire élevée généralement organique ou semi-organique. { bidder: 'ix', params: { siteId: '195464', size: [120, 600] }}, They are found widely in the natural world (e.g. Addition polymer definition, a polymer formed by the direct reaction of two or more monomers, and with no resulting water or other by-product. A polymer (/ ˈ p ɒ l ɪ m ər /; Greek poly-, "many" + -mer, "part") is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits. { bidder: 'onemobile', params: { dcn: '8a9690ab01717182962182bb50ce0007', pos: 'cdo_topslot_mobile_flex' }}, var dfpSlots = {}; { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_rightslot' }}, polymer definition: 1. a chemical substance consisting of large molecules made from many smaller and simpler molecules…. Click on the arrows to change the translation direction. expires: 365 Glossary of Polymer Terminology. { bidder: 'ix', params: { siteId: '194852', size: [300, 250] }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot' }}]}, 2020 - vol. Polymers may be divided into two categories. { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, var pbDesktopSlots = [ { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, The word polymer is derived from the Greek words poly-, meaning many and meros-, which means part. bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776156', position: 'atf' }}, { bidder: 'sovrn', params: { tagid: '346688' }}, Biological polymers such as a polypeptide chain are heteropolymers where each segment is different. { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_MidArticle' }}, Unlike thermosets, which decompose rather than melt, thermoplastics melt into a liquid upon heating. The modern understanding of polymers as macromolecules was proposed by German organic chemist Hermann Staudinger (1881–1965) in 1920. dfpSlots['houseslot_a'] = googletag.defineSlot('/2863368/houseslot', [300, 250], 'ad_houseslot_a').defineSizeMapping(mapping_houseslot_a).setTargeting('sri', '0').setTargeting('vp', 'mid').setTargeting('hp', 'right').setCategoryExclusion('house').addService(googletag.pubads()); The simplest definition of a polymer is a useful chemical made of many repeating units. The plastic stays out of shape when deformed and typically decompose before they melt. { bidder: 'ix', params: { siteId: '195451', size: [320, 50] }}, { bidder: 'ix', params: { siteId: '555365', size: [160, 600] }}, 'increment': 1, 'min': 8.50, },{ Even if it is strongly associated with the production of thermosetting polymers, the term curing can be used for all the processes where starting from a liquid solution, a solid product is obtained. dfpSlots['rightslot'] = googletag.defineSlot('/2863368/rightslot', [[300, 250]], 'ad_rightslot').defineSizeMapping(mapping_rightslot).setTargeting('sri', '0').setTargeting('vp', 'mid').setTargeting('hp', 'right').addService(googletag.pubads()); Because the molecules consist of many monomers, polymers tend to have high molecular masses. The Journal of Polymer Science Part A: Polymer Chemistry is a peer-reviewed scientific journal covering polymer science.The journal is dedicated to studies in fundamental organic polymer chemistry and physical organic chemistry. This polymer was used as a surgical dressing, starting with the U.S. Civil War and afterward. A Presentation for the ; Introductory Seminar in Chemistry ; The University of Akron ; October 15, 2008 ; Traian-Ovidiu Gheorghiu; 2 What is a polymer ? ga('set', 'dimension2', "entryex"); Book: Polymer Chemistry (Schaller) 1: Monomers and Polymers Expand/collapse global location ... We can think of these polymers as "co-polymers", meaning they are formed from more than one kind of monomer. iasLog("criterion : cdo_l = en"); { bidder: 'openx', params: { unit: '541042770', delDomain: 'idm-d.openx.net' }}, bidderSequence: "fixed" { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_leftslot' }}, var googletag = googletag || {}; { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_topslot' }}]}, } bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '1666926', position: 'btf' }}, The process of vulcanizing rubber by adding sulfur and applying heat was described by British engineer Thomas Hancock (1786–1865) in 1843 (UK patent) and American chemist Charles Goodyear (1800–1860) in 1844. var mapping_btmslot_a = googletag.sizeMapping().addSize([746, 0], [[300, 250], 'fluid']).addSize([0, 0], [[300, 250], [320, 50], [300, 50], 'fluid']).build(); Submit your article Opens in new window Information and templates for authors Search this journal. The word was coined by Swedish chemist Jons Jacob Berzelius (1779–1848) in 1833, although with a slightly different meaning from the modern definition. priceGranularity: customGranularity, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, Bakelite, Kevlar, and vulcanized rubber are also thermoset plastics. { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_topslot_728x90' }}, iasLog("criterion : cdo_dc = english"); { bidder: 'appnexus', params: { placementId: '11653860' }}, },{ The process to make it was devised in 1862 by British chemist Alexander Parkes (1812–1890). { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, { bidder: 'sovrn', params: { tagid: '387232' }}, Lecture: Wed., 12:15 - 13:45, HS C03 Exercise: Tue., 13:00 - 13:45, Seminar room 107 . var mapping_leftslot = googletag.sizeMapping().addSize([1063, 0], [[120, 600], [160, 600], [300, 600]]).addSize([963, 0], [[120, 600], [160, 600]]).addSize([0, 0], []).build(); polymer. Sources: IUPAC: "Glossary of Basic Terms in Polymer Science", Commission on Macromolecular Nomenclature, Macromolecular Division, International Union of Pure and Applied Chemistry, draft: May 13, 1991. Figure 13 shows the mean velocity profiles for x-locations between 25 and 200 mm downstream of the injectors during, A ramp-filling procedure applied to filling, If liquid paint with volatile solvent is deposited on a substrate, we can assume that initially the, The targeting ligand is covalently coupled to the drug, making the efficiency of drug loading and uptake comparatively lower than in. polymer définition, signification, ce qu'est polymer: 1. a chemical substance consisting of large molecules made from many smaller and simpler molecules…. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. 2019 - vol. 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polymer chemistry meaning

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