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Article: Events in the mould during heat processing of poly(methyl methacrylate).
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TitleEvents in the mould during heat processing of poly(methyl methacrylate).
 
AuthorsClark, RKF
Cheng, YY
Chow, TW
 
Issue Date2003
 
PublisherFDI World Dental Press Ltd. The Journal's web site is located at http://www.fdiworldental.org/resources/4_4prosthodontics.html
 
CitationEuropean 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.
 
ISSN0965-7452
2013 SCImago Journal Rankings: 0.190
 
DC FieldValue
dc.contributor.authorClark, RKF
 
dc.contributor.authorCheng, YY
 
dc.contributor.authorChow, TW
 
dc.date.accessioned2012-08-08T08:24:07Z
 
dc.date.available2012-08-08T08:24:07Z
 
dc.date.issued2003
 
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.
 
dc.description.naturelink_to_subscribed_fulltext
 
dc.identifier.citationEuropean Journal Of Prosthodontics And Restorative Dentistry, 2003, v. 11 n. 1, p. 29-31 [How to Cite?]
 
dc.identifier.epage31
 
dc.identifier.hkuros81797
 
dc.identifier.issn0965-7452
2013 SCImago Journal Rankings: 0.190
 
dc.identifier.issue1
 
dc.identifier.openurl
 
dc.identifier.pmid12705036
 
dc.identifier.scopuseid_2-s2.0-0038072890
 
dc.identifier.spage29
 
dc.identifier.urihttp://hdl.handle.net/10722/154237
 
dc.identifier.volume11
 
dc.languageeng
 
dc.publisherFDI World Dental Press Ltd. The Journal's web site is located at http://www.fdiworldental.org/resources/4_4prosthodontics.html
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofThe European journal of prosthodontics and restorative dentistry
 
dc.subject.meshDental Models
 
dc.subject.meshDenture Bases
 
dc.subject.meshDifferential Thermal Analysis
 
dc.subject.meshHot Temperature
 
dc.subject.meshHumans
 
dc.subject.meshPolymethyl Methacrylate - Chemistry
 
dc.subject.meshPressure
 
dc.subject.meshRheology
 
dc.subject.meshTechnology, Dental
 
dc.subject.meshViscosity
 
dc.titleEvents in the mould during heat processing of poly(methyl methacrylate).
 
dc.typeArticle
 
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