Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers

Detalhes bibliográficos
Autor(a) principal: Yusuf,Yusril
Data de Publicação: 2017
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=S1516-14392017000601541
Resumo: We studied physical properties of main-chain liquid crystalline elastomers (MCLCEs) to observe the influence of variations of cross-linker concentrations on properties such as spontaneous deformation, elastic free energy, and order parameter. Cross-linker concentrations of four MCLCE samples were 8%, 12%, 14%, and 16%. Samples with higher cross-linker concentrations underwent spontaneous deformation to a greater extent than those with lower concentrations, indicated by a smaller aspect ratio of length from the end to the beginning of heating. We also reformulated the elastic free energy expression to observe the dependence of the physical quantity on temperature variation. It showed that the maximum relative elastic free energy of the MCLCEs occurred at different temperatures, dependent on cross-linking density, where higher density caused the maximum relative free energy to decrease. The cross-linker concentration also significantly influenced the order parameter of the samples, where the higher the cross-linker concentration, the higher the maximum order parameter.
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spelling Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomerselastic free energymain-chain liquid crystalline elastomersorder parameterspontaneous deformationWe studied physical properties of main-chain liquid crystalline elastomers (MCLCEs) to observe the influence of variations of cross-linker concentrations on properties such as spontaneous deformation, elastic free energy, and order parameter. Cross-linker concentrations of four MCLCE samples were 8%, 12%, 14%, and 16%. Samples with higher cross-linker concentrations underwent spontaneous deformation to a greater extent than those with lower concentrations, indicated by a smaller aspect ratio of length from the end to the beginning of heating. We also reformulated the elastic free energy expression to observe the dependence of the physical quantity on temperature variation. It showed that the maximum relative elastic free energy of the MCLCEs occurred at different temperatures, dependent on cross-linking density, where higher density caused the maximum relative free energy to decrease. The cross-linker concentration also significantly influenced the order parameter of the samples, where the higher the cross-linker concentration, the higher the maximum order parameter.ABM, ABC, ABPol2017-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601541Materials Research v.20 n.6 2017reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2017-0375info:eu-repo/semantics/openAccessYusuf,Yusrileng2018-05-21T00:00:00Zoai:scielo:S1516-14392017000601541Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-05-21T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
title Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
spellingShingle Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
Yusuf,Yusril
elastic free energy
main-chain liquid crystalline elastomers
order parameter
spontaneous deformation
title_short Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
title_full Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
title_fullStr Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
title_full_unstemmed Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
title_sort Influence of Cross-Linker Concentration on Physical Properties of Main-Chain Liquid Crystalline Elastomers
author Yusuf,Yusril
author_facet Yusuf,Yusril
author_role author
dc.contributor.author.fl_str_mv Yusuf,Yusril
dc.subject.por.fl_str_mv elastic free energy
main-chain liquid crystalline elastomers
order parameter
spontaneous deformation
topic elastic free energy
main-chain liquid crystalline elastomers
order parameter
spontaneous deformation
description We studied physical properties of main-chain liquid crystalline elastomers (MCLCEs) to observe the influence of variations of cross-linker concentrations on properties such as spontaneous deformation, elastic free energy, and order parameter. Cross-linker concentrations of four MCLCE samples were 8%, 12%, 14%, and 16%. Samples with higher cross-linker concentrations underwent spontaneous deformation to a greater extent than those with lower concentrations, indicated by a smaller aspect ratio of length from the end to the beginning of heating. We also reformulated the elastic free energy expression to observe the dependence of the physical quantity on temperature variation. It showed that the maximum relative elastic free energy of the MCLCEs occurred at different temperatures, dependent on cross-linking density, where higher density caused the maximum relative free energy to decrease. The cross-linker concentration also significantly influenced the order parameter of the samples, where the higher the cross-linker concentration, the higher the maximum order parameter.
publishDate 2017
dc.date.none.fl_str_mv 2017-12-01
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=S1516-14392017000601541
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601541
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2017-0375
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.20 n.6 2017
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_ 1754212671497961472

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