Modified method for obtaining the critical cooling rate for vitrification of polymers

Detalhes bibliográficos
Autor(a) principal: Canova,Claudia
Data de Publicação: 2007
Outros Autores: Carvalho,Benjamim de Melo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000400020
Resumo: Due to the relevance of the critical cooling rate, Rc, for glasses, Barandiarán and Colmenero (BC) developed a method for calculating Rc as a function of the crystallization temperature on cooling obtained from thermal analysis. The critical cooling rate is obtained by the extrapolation method to conditions of infinity undercooling. However, for polymers, there is a strong reason for modifying the original BC method. In this case, the extrapolation must be extended only to the undercooling associated to the glass transition temperature, Tg, because no crystallization can occur below this temperature. Following this modified method (MBC) proposed by the present authors, the critical cooling rate for PP, PEEK, P10MS and PET were determined. The results showed that the new values are much lower than those obtained by the original BC method.
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spelling Modified method for obtaining the critical cooling rate for vitrification of polymerscritical cooling ratenoncrystalline polymerscrystallizationP10MSPPDue to the relevance of the critical cooling rate, Rc, for glasses, Barandiarán and Colmenero (BC) developed a method for calculating Rc as a function of the crystallization temperature on cooling obtained from thermal analysis. The critical cooling rate is obtained by the extrapolation method to conditions of infinity undercooling. However, for polymers, there is a strong reason for modifying the original BC method. In this case, the extrapolation must be extended only to the undercooling associated to the glass transition temperature, Tg, because no crystallization can occur below this temperature. Following this modified method (MBC) proposed by the present authors, the critical cooling rate for PP, PEEK, P10MS and PET were determined. The results showed that the new values are much lower than those obtained by the original BC method.ABM, ABC, ABPol2007-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000400020Materials Research v.10 n.4 2007reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392007000400020info:eu-repo/semantics/openAccessCanova,ClaudiaCarvalho,Benjamim de Meloeng2008-02-07T00:00:00Zoai:scielo:S1516-14392007000400020Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2008-02-07T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Modified method for obtaining the critical cooling rate for vitrification of polymers
title Modified method for obtaining the critical cooling rate for vitrification of polymers
spellingShingle Modified method for obtaining the critical cooling rate for vitrification of polymers
Canova,Claudia
critical cooling rate
noncrystalline polymers
crystallization
P10MS
PP
title_short Modified method for obtaining the critical cooling rate for vitrification of polymers
title_full Modified method for obtaining the critical cooling rate for vitrification of polymers
title_fullStr Modified method for obtaining the critical cooling rate for vitrification of polymers
title_full_unstemmed Modified method for obtaining the critical cooling rate for vitrification of polymers
title_sort Modified method for obtaining the critical cooling rate for vitrification of polymers
author Canova,Claudia
author_facet Canova,Claudia
Carvalho,Benjamim de Melo
author_role author
author2 Carvalho,Benjamim de Melo
author2_role author
dc.contributor.author.fl_str_mv Canova,Claudia
Carvalho,Benjamim de Melo
dc.subject.por.fl_str_mv critical cooling rate
noncrystalline polymers
crystallization
P10MS
PP
topic critical cooling rate
noncrystalline polymers
crystallization
P10MS
PP
description Due to the relevance of the critical cooling rate, Rc, for glasses, Barandiarán and Colmenero (BC) developed a method for calculating Rc as a function of the crystallization temperature on cooling obtained from thermal analysis. The critical cooling rate is obtained by the extrapolation method to conditions of infinity undercooling. However, for polymers, there is a strong reason for modifying the original BC method. In this case, the extrapolation must be extended only to the undercooling associated to the glass transition temperature, Tg, because no crystallization can occur below this temperature. Following this modified method (MBC) proposed by the present authors, the critical cooling rate for PP, PEEK, P10MS and PET were determined. The results showed that the new values are much lower than those obtained by the original BC method.
publishDate 2007
dc.date.none.fl_str_mv 2007-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000400020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000400020
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392007000400020
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.10 n.4 2007
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
_version_ 1754212658855280640

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