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Article: Events in the mould during heat processing of poly(methyl methacrylate).

TitleEvents in the mould during heat processing of poly(methyl methacrylate).
Authors
Issue Date2003
PublisherFDI World Dental Press Ltd. The Journal's web site is located at http://www.fdiworldental.org/resources/4_4prosthodontics.html
Citation
European Journal Of Prosthodontics And Restorative Dentistry, 2003, v. 11 n. 1, p. 29-31 How to Cite?
AbstractRecordings of temperature and pressure in the mould have raised questions concerning the flow of poly(methylmethacrylate) during heat processing. Three simple experiments investigated flow of polymerised and partly polymerised poly(methylmethacrylate). Flow was not observed at normal processing temperatures. These results, combined with the results of previous work, suggest that as the mould heats up, thermal expansion of the dough exceeds polymerisation contraction, causing increase in pressure rather than flow. Maximum pressure occurs at maximum temperature. Thereafter, thermal expansion is reduced, polymerisation contraction increases and pressure in the mould drops. When the lowest pressure is reached the poly(methylmethacrylate) is polymerised.
Persistent Identifierhttp://hdl.handle.net/10722/154237
ISSN
2014 SCImago Journal Rankings: 0.163

 

DC FieldValueLanguage
dc.contributor.authorClark, RKFen_US
dc.contributor.authorCheng, YYen_US
dc.contributor.authorChow, TWen_US
dc.date.accessioned2012-08-08T08:24:07Z-
dc.date.available2012-08-08T08:24:07Z-
dc.date.issued2003en_US
dc.identifier.citationEuropean Journal Of Prosthodontics And Restorative Dentistry, 2003, v. 11 n. 1, p. 29-31en_US
dc.identifier.issn0965-7452en_US
dc.identifier.urihttp://hdl.handle.net/10722/154237-
dc.description.abstractRecordings of temperature and pressure in the mould have raised questions concerning the flow of poly(methylmethacrylate) during heat processing. Three simple experiments investigated flow of polymerised and partly polymerised poly(methylmethacrylate). Flow was not observed at normal processing temperatures. These results, combined with the results of previous work, suggest that as the mould heats up, thermal expansion of the dough exceeds polymerisation contraction, causing increase in pressure rather than flow. Maximum pressure occurs at maximum temperature. Thereafter, thermal expansion is reduced, polymerisation contraction increases and pressure in the mould drops. When the lowest pressure is reached the poly(methylmethacrylate) is polymerised.en_US
dc.languageengen_US
dc.publisherFDI World Dental Press Ltd. The Journal's web site is located at http://www.fdiworldental.org/resources/4_4prosthodontics.htmlen_US
dc.relation.ispartofThe European journal of prosthodontics and restorative dentistryen_US
dc.subject.meshDental Modelsen_US
dc.subject.meshDenture Basesen_US
dc.subject.meshDifferential Thermal Analysisen_US
dc.subject.meshHot Temperatureen_US
dc.subject.meshHumansen_US
dc.subject.meshPolymethyl Methacrylate - Chemistryen_US
dc.subject.meshPressureen_US
dc.subject.meshRheologyen_US
dc.subject.meshTechnology, Dentalen_US
dc.subject.meshViscosityen_US
dc.titleEvents in the mould during heat processing of poly(methyl methacrylate).en_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0965-7452&volume=11&spage=29&epage=31&date=2003&atitle=Events+in+the+Mound+During+Heat+Processing+of+Poly(methyl+Methacrylate)-
dc.identifier.emailCheng, YY: yycheng@hku.hken_US
dc.identifier.emailChow, TW:twchow@hku.hk-
dc.identifier.authorityChow, TW=rp00009en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid12705036en_US
dc.identifier.scopuseid_2-s2.0-0038072890en_US
dc.identifier.hkuros81797-
dc.identifier.volume11en_US
dc.identifier.issue1en_US
dc.identifier.spage29en_US
dc.identifier.epage31en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridClark, RK=7406318698en_US
dc.identifier.scopusauthoridCheng, YY=7404915527en_US
dc.identifier.scopusauthoridChow, TW=7203012369en_US

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