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Article: Pressure and temperature changes of heat-cured acrylic resin during processing
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TitlePressure and temperature changes of heat-cured acrylic resin during processing
 
AuthorsYau, EWF
Cheng, YY2
Clark, RKF1
Chow, TW2
 
Issue Date2002
 
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dental
 
CitationDental Materials, 2002, v. 18 n. 8, p. 622-629 [How to Cite?]
DOI: http://dx.doi.org/10.1016/S0109-5641(01)00092-6
 
AbstractOBJECTIVES: The aims of this study were to measure the pressure and temperature changes of acrylic resin during processing, to record the highest temperature reached when fast cured in boiling water and to determine the elevated boiling point of monomer under high pressure. METHODS: A subminiature pressure transducer (temperature compensated to 94 degrees C) and a thermocouple were placed on the palate of a standardized maxillary complete denture base. A heat-cured resin (Trevalon C) was polymerized by a long heating cycle (72 degrees C for 6.5 h and 92 degrees C for 1.5 h). Recordings of pressure and temperature (n=6) were made at initial clamping of denture flasks and throughout the processing cycles of resin. The temperature of the resin was also monitored during a fast cycle, which was accomplished by placing the flask directly into boiling water for 40 min. RESULTS: The pressure of acrylic dough inside the clamped flask was initially 11.5 atm (SD=3.2) and reached a peak of 22.0 atm (SD=3.5) during the long heating cycle. The elevated boiling point of monomer at increased pressure was calculated to be about 193 degrees C (at 11.5 atm) and 228 degrees C (at 22.0 atm). These elevated boiling points are higher than the maximum temperature 131 degrees C (SD=6.6) reached during the fast curing cycle. No porosity was observed even in the denture bases heat-cured by the fast cycle. SIGNIFICANCE: The highest temperature reached by heating of resin during processing is well below the elevated boiling point of monomer. Monomer therefore does not boil in clamped denture flasks under sufficient pressure. Thus adequate clamp pressure prevents gaseous porosity irrespective of curing cycle used.
 
ISSN0109-5641
2012 Impact Factor: 3.773
2012 SCImago Journal Rankings: 1.457
 
DOIhttp://dx.doi.org/10.1016/S0109-5641(01)00092-6
 
ISI Accession Number IDWOS:000179320900009
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorYau, EWF
 
dc.contributor.authorCheng, YY
 
dc.contributor.authorClark, RKF
 
dc.contributor.authorChow, TW
 
dc.date.accessioned2012-08-08T08:23:55Z
 
dc.date.available2012-08-08T08:23:55Z
 
dc.date.issued2002
 
dc.description.abstractOBJECTIVES: The aims of this study were to measure the pressure and temperature changes of acrylic resin during processing, to record the highest temperature reached when fast cured in boiling water and to determine the elevated boiling point of monomer under high pressure. METHODS: A subminiature pressure transducer (temperature compensated to 94 degrees C) and a thermocouple were placed on the palate of a standardized maxillary complete denture base. A heat-cured resin (Trevalon C) was polymerized by a long heating cycle (72 degrees C for 6.5 h and 92 degrees C for 1.5 h). Recordings of pressure and temperature (n=6) were made at initial clamping of denture flasks and throughout the processing cycles of resin. The temperature of the resin was also monitored during a fast cycle, which was accomplished by placing the flask directly into boiling water for 40 min. RESULTS: The pressure of acrylic dough inside the clamped flask was initially 11.5 atm (SD=3.2) and reached a peak of 22.0 atm (SD=3.5) during the long heating cycle. The elevated boiling point of monomer at increased pressure was calculated to be about 193 degrees C (at 11.5 atm) and 228 degrees C (at 22.0 atm). These elevated boiling points are higher than the maximum temperature 131 degrees C (SD=6.6) reached during the fast curing cycle. No porosity was observed even in the denture bases heat-cured by the fast cycle. SIGNIFICANCE: The highest temperature reached by heating of resin during processing is well below the elevated boiling point of monomer. Monomer therefore does not boil in clamped denture flasks under sufficient pressure. Thus adequate clamp pressure prevents gaseous porosity irrespective of curing cycle used.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationDental Materials, 2002, v. 18 n. 8, p. 622-629 [How to Cite?]
DOI: http://dx.doi.org/10.1016/S0109-5641(01)00092-6
 
dc.identifier.doihttp://dx.doi.org/10.1016/S0109-5641(01)00092-6
 
dc.identifier.epage629
 
dc.identifier.hkuros81787
 
dc.identifier.isiWOS:000179320900009
 
dc.identifier.issn0109-5641
2012 Impact Factor: 3.773
2012 SCImago Journal Rankings: 1.457
 
dc.identifier.issue8
 
dc.identifier.pmid12385904
 
dc.identifier.scopuseid_2-s2.0-0036885644
 
dc.identifier.spage622
 
dc.identifier.urihttp://hdl.handle.net/10722/154215
 
dc.identifier.volume18
 
dc.languageeng
 
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dental
 
dc.publisher.placeUnited States
 
dc.relation.ispartofDental Materials
 
dc.relation.referencesReferences in Scopus
 
dc.subject.meshTemperature
 
dc.subject.meshPressure
 
dc.subject.meshPorosity
 
dc.subject.meshPolymers - Chemistry
 
dc.subject.meshPhysicochemical Phenomena
 
dc.subject.meshMethylmethacrylates - Chemistry
 
dc.subject.meshAcrylic Resins - chemistry
 
dc.subject.meshChemistry, Physical
 
dc.subject.meshDenture Bases
 
dc.subject.meshDifferential Thermal Analysis
 
dc.subject.meshMaterials Testing
 
dc.titlePressure and temperature changes of heat-cured acrylic resin during processing
 
dc.typeArticle
 
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Author Affiliations
  1. King's College London
  2. The University of Hong Kong