Word of the day - in your inbox every day, 2023 HowToPronounce. US . 0 && stateHdr.searchDesk ? Add ${headword} to one of your lists below, or create a new one. For example, for the polymerization of ethylene, 93.6 kJ of energy are released per mole of monomer.[8]. Chain-growth polymerization (or addition polymerization) involves the linking together of unsaturated monomers, especially containing carbon-carbon double bonds. In polymer chemistry, polymerization (American English), or polymerisation (British English), is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. The tiny molecules known as monomers serve as the foundation for polymers. Polymerization is the process of forming larger macromolecules from simpler sub-units known as monomers. Julia. Cambridge Advanced Learner's Dictionary & Thesaurus. Can you pronounce this word better or pronounce in different accent or variation ? Samantha. Polymerization | Definition, Classes, & Examples | Britannica Definition. Phrases with the verbs speak and say, Cambridge University Press & Assessment 2023. Learn a new word every day. mer p-l-mr : a chemical compound or mixture of compounds formed by polymerization and consisting essentially of repeating structural units polymeric p-l-mer-ik adjective polymerism p-li-m-ri-zm p-l-m- noun polymerlike p-l-mr-lk adjective Example Sentences Condensation polymer - Wikipedia Subscribe to learn and pronounce a new word each day! This term refers to a chemical process in which monomers are brought together through which polymers are produced. {{view.translationsData[trans_lang][0].vote_count}}, {{app.userTrophy[app.userTrophyNo].hints}}, {{view.translationsData[trans_lang][0].word}}, {{view.translationsData[trans_lang][0].username}}. A special case of chain-growth polymerization leads to living polymerization. Very difficult. Cationic Ring-Opening Polymerization | SpringerLink We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. How to pronounce POLYMER in English - Cambridge Dictionary 2.5 Degree of Polymerization. Crowdsourced audio pronunciation dictionary for 89 languages, with meanings, synonyms, sentence usages, translations and much more. Britannica.com: Encyclopedia article about polymerization. transitive verb : to subject to polymerization intransitive verb : to undergo polymerization Example Sentences Recent Examples on the Web Alkalization also causes flavonoids to polymerize (link together), which reduces the astringency of the nibs [2]. Please refer to the appropriate style manual or other sources if you have any questions. US English. In more straightforward polymerizations, alkenes form polymers through relatively simple radical reactions; in contrast, reactions involving substitution at a carbonyl group require more complex synthesis due to the way in which reactants polymerize. Usage explanations of natural written and spoken English, British and American pronunciations with audio, With appropriate reaction conditions, chemists can then restart, The mechanical requirements were also important, because after, A key step of the research was to design synthetic monomers undergoing electrochemical, We demonstrate a visible light -- triggered quantitative topochemical, The bithiophene substituent permitted the electrochemical, Each subunit has an active site in which the, In this paper the reactions correspond to the autocatalytic, This makes nucleic acids the prime molecular species where faithful templated, Because of conservation of total actin, actin, This concept of active centers can be found in nature in the chemical. {{view.translationsData[trans_lang][0].vote_count}}, {{app.userTrophy[app.userTrophyNo].hints}}, {{view.translationsData[trans_lang][0].word}}, {{view.translationsData[trans_lang][0].username}}. Moderate. These examples are from corpora and from sources on the web. Rate the pronunciation difficulty of polymerization. 181 Citations Metrics Abstract This work presents a generalized structure generation methodology for amorphous polymers by a simulated polymerization technique and 21-step molecular dynamics equilibration, which is particularly effective for high- T g polymers. Let us know if you have suggestions to improve this article (requires login). Unfortunately, this device does not support voice recording, Click the record button again to finish recording. The consent submitted will only be used for data processing originating from this website. [1] [2] [3] There are many forms of polymerization and different systems exist to categorize them. Step-growth polymers are formed by independent reaction steps between functional groups of monomer units, usually containing heteroatoms such as nitrogen or oxygen. Most step-growth polymers are also classified as condensation polymers, since a small molecule such as water is lost when the polymer chain is lengthened. Both linear and cross-linked polymers can be made by either addition or condensation polymerization. Victoria. Usually at least 100 monomer molecules must be combined to make a product that has certain unique physical propertiessuch as elasticity, high tensile strength, or the ability to form fibresthat differentiate polymers from substances composed of smaller and simpler molecules; often, many thousands of monomer units are incorporated in a single molecule of a polymer. Because displays such as the one above are cumbersome, the polymerization is often abbreviated as follows: n CH 2 =CH 2 [ CH 2 CH 2 ] n During the polymeriation of ethene, thousands of ethene molecules join together to make poly (ethene) - commonly called polythene. POLYMERIZE | Pronunciation in English - Cambridge Dictionary Crowdsourced audio pronunciation dictionary for 89 languages, with meanings, synonyms, sentence usages, translations and much more. the conversion of one compound into another by such a process. How to pronounce The polymerization | HowToPronounce.com In general, polymers such as PVC are referred to as "homopolymers", as they consist of repeated long chains or structures of the same monomer unit, whereas polymers that consist of more than one monomer unit are referred to as copolymers (or co-polymers).[5]. US . Listen to the pronunciation of In situ polymerization and learn how to pronounce In situ polymerization correctly. ZieglerNatta polymerization allows considerable control of polymer branching. Log in or What is Polymerization? - Definition, Types & Examples However, there are exceptions; for example polyurethanes are step-growth polymers formed from isocyanate and alcohol bifunctional monomers) without loss of water or other volatile molecules, and are classified as addition polymers rather than condensation polymers. In condensation polymerization, each step of the process is accompanied by the formation of a molecule of some simple compound, often water. Polymerization - Definition, Meaning & Synonyms | Vocabulary.com Degree of polymerization. 'pa pdd chac-sb tc-bd bw hbr-20 hbss lpt-25' : 'hdn'">, Test your vocabulary with our fun image quizzes, Clear explanations of natural written and spoken English. Add ${headword} to one of your lists below, or create a new one. Subscribe to America's largest dictionary and get thousands more definitions and advanced searchad free! The degree of polymerization, or DP, is the number of monomeric units in a macromolecule or polymer or oligomer molecule. The monomer molecules may be all alike, or they may represent two, three, or more different compounds. Keep up. [11], Multiphoton polymerization using single pulses have also been demonstrated for fabrication of complex structures using a digital micromirror device. Very difficult. 433, April 19, 1884. In polymerization In addition polymerization, monomers react to form a polymer without the formation of by-products. to give someone official authority or the freedom to do something, Youre speaking my language! The degree of polymerization (DP or Xn) is defined as the number of monomer units in the polymer. 0 && stateHdr.searchDesk ? In step-growth (or step) polymerization, pairs of reactants, of any lengths, combine at each step to form a longer polymer molecule. the act or process of forming a polymer or polymeric compound. Congrats! The growth steps are expressed by: P x +P y P x+y +L {x} {1,2,}; {y} {1,2,} where P x and P y denote chains of degrees of polymerization x . [8], In chain-growth (or chain) polymerization, the only chain-extension reaction step is the addition of a monomer to a growing chain with an active center such as a free radical, cation, or anion. Two classes of polymerization usually are distinguished. Oops! Register Samantha. How to pronounce polymerization - Synonyms.com Learn how to pronounce Polymerization vinyl chloride Keep up. Polymerization - an overview | ScienceDirect Topics We recommend you to try Safari. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. How To Say Polymerization - YouTube Add ${headword} to one of your lists below, or create a new one. Difficult. Register Polymerization definition: the act or process of forming a polymer or copolymer , esp a chemical reaction in which a. Hence, the overview has been written for a general scientific audience with no prior knowledge . In addition polymerization, monomers react to form a polymer without the formation of by-products. Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. You've got the pronunciation of polymerization right. The macromolecules produced from a polymerization may have a linear or a branched structure. [10], Photopolymerization can be used as a photographic or printing process because polymerization only occurs in regions which have been exposed to light. Usage explanations of natural written and spoken English, British and American pronunciations with audio. The monomer molecules may be all alike, or they may represent two, three, or more different compounds. the act or process of forming a polymer or polymeric compound. 0 rating. or post as a guest. tion Here are all the possible pronunciations of the word polymerization. The word in the example sentence does not match the entry word. US English. 2.1 Introduction to Polymerization. How to pronounce Polymerisation | HowToPronounce.com Polymerization - Wikipedia Polymerization is a chemical reaction where one or more small molecules combine together to form a larger molecule. Anshuman Shrivastava, in Introduction to Plastics Engineering, 2018. Subscribe to learn and pronounce a new word each day! These polymers are then processed to make various kinds of plastic products. The single molecules which make up these polymers are called monomers. mr- / Add to word list chemistry a chemical reaction in which many small molecules join to make a polymer (Definition of polymerization from the Cambridge Academic Content Dictionary Cambridge University Press) Examples of polymerization Moderate. Examples of The polymerization in a sentence. You can contribute this audio pronunciation of Polymerisation to HowToPronounce dictionary. In general, only the initiation step differs from that of the ordinary thermal polymerization of the same monomer; subsequent propagation, termination, and chain-transfer steps are unchanged. Solid state polymerization to afford polyamides (e.g., nylons) is an example of step-growth polymerization. [6] Several forms of 3D printingincluding layer-by-layer stereolithography and two-photon absorption 3D photopolymerizationuse photopolymerization. Accessed 04 Jul. Notes: 1. David. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. What is Hazardous Polymerization? - Definition from Safeopedia Fred. Congrats! You can try again. a chemical process that combines several monomers to form a polymer or polymeric compound synonyms: polymerisation see more Cite this entry Style: MLA "Polymerization." Vocabulary.com Dictionary, Vocabulary.com, https://www.vocabulary.com/dictionary/polymerization. Addition polymerizations usually are carried out in the presence of catalysts, which in certain cases exert control over structural details that have important effects on the properties of the polymer. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Cambridge Advanced Learner's Dictionary & Thesaurus. You can try again. {{app.userTrophy[app.userTrophyNo].hints}}. Click on the arrows to change the translation direction. You can try again. Word of the day - in your inbox every day, 2023 HowToPronounce. The latter more reliably affords high molecular-weight polymers, but only applies to certain monomers. Congrats! Difficult. Unfortunately, this browser does not support voice recording. (English pronunciations of polymerization from the Cambridge Advanced Learner's Dictionary & Thesaurus and from the Cambridge Academic Content Dictionary, both sources Cambridge University Press), to give someone official authority or the freedom to do something, Youre speaking my language! Safeopedia Explains Hazardous Polymerization Polymerization is the process to create polymers. tion Here are all the possible pronunciations of the word polymerization. The formation of stable covalent chemical bonds between the monomers sets polymerization apart from other processes, such as crystallization, in which large numbers of molecules aggregate under the influence of weak intermolecular forces. US English. Updates? US English. For example, polyester chains grow by reaction of alcohol and carboxylic acid groups to form ester links with loss of water. Degree of polymerization - Wikipedia [6] Unreacted monomer can be removed from unexposed regions, leaving a relief polymeric image. While every effort has been made to follow citation style rules, there may be some discrepancies. Oops! Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. In step-growth photopolymerization, absorption of light triggers an addition (or condensation) reaction between two comonomers that do not react without light. 'pa pdd chac-sb tc-bd bw hbr-20 hbss lpt-25' : 'hdn'">, Test your vocabulary with our fun image quizzes, Clear explanations of natural written and spoken English. a chemical process that combines several monomers to form a polymer or polymeric compound, Pfliiger suggests that such compounds arose when the surface of the earth was incandescent, and that in the long process of cooling, compounds of cyanogen and hydrocarbons passed into living protoplasm by such processes of transformation and polymerization as are familiar in the chemical groups in q. It is calculated as the ratio of molecular weight of a polymer and molecular weight of the repeat unit. the combination of many like or unlike molecules to form a more complex product of higher molecular weight, with elimination of water, alcohol, or the like (condensation polymerization ), or without such elimination (addition polymerization ). Rate the pronunciation difficulty of The polymerization. All Rights Reserved, {{app['fromLang']['value']}} -> {{app['toLang']['value']}}, Pronunciation of The polymerization with 2 audio pronunciations. Seems like your pronunciation of polymerization is not correct. Learn more about contrasting, interpreting and analyzing them as well as review further. Learn how to say Polymerization with EmmaSaying free pronunciation tutorials.Definition and meaning can be found here:https://www.google.com/search?q=define+. Record the pronunciation of this word in your own voice and play it to listen to how you have pronounced it. Pick your prefered accent: Alex. Unfortunately, this browser does not support voice recording. tion p-li-m-r-z-shn p-l-m-r- 1 : a chemical reaction in which two or more molecules combine to form larger molecules that contain repeating structural units compare association sense 5 2 : reduplication of parts in an organism Example Sentences You have earned {{app.voicePoint}} points. polymer pronunciation. Oxidation, dehydration and polymerization have all been suggested, but there is little direct evidence. 0 rating. The word in the example sentence does not match the entry word. Listen to the audio pronunciation in the Cambridge English Dictionary. Chain-growth polymerization is involved in the manufacture of polymers such as polyethylene, polypropylene, polyvinyl chloride (PVC), and acrylate.
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