Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure

Detalhes bibliográficos
Autor(a) principal: Costa,Ricardo O.R.
Data de Publicação: 2002
Outros Autores: Vasconcelos,Wander L., Laine,Richard M.
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=S1516-14392002000300005
Resumo: We have developed a method to obtain polymer hybrids with control of inorganic content and molecular configuration. Hybrid poly(methyl methacrylate) (PMMA) was obtained via atom transfer radical polymerization (ATRP) initiated by octafunctional cubic silsesquioxanes using CuCl as catalyst. Two different ATRP initiators obtained by attaching specific chemical groups to the cubic silsesquioxane were employed to produce two types of hybrids with different architectures. While a-bromide ester groups generated a star-shaped polymer, the benzyl chloride groups produced longer and more linear polymeric chains containing the cubic silsesquioxane. These results were explained on the basis of the low initiation efficiency of benzyl chloride groups for PMMA, leading to polymers with molecular weights (Mn) and polydispersities (PDI) higher than the expected ones.
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spelling Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structurepolymer hybridstructural controlcubic silsesquioxaneATRPWe have developed a method to obtain polymer hybrids with control of inorganic content and molecular configuration. Hybrid poly(methyl methacrylate) (PMMA) was obtained via atom transfer radical polymerization (ATRP) initiated by octafunctional cubic silsesquioxanes using CuCl as catalyst. Two different ATRP initiators obtained by attaching specific chemical groups to the cubic silsesquioxane were employed to produce two types of hybrids with different architectures. While a-bromide ester groups generated a star-shaped polymer, the benzyl chloride groups produced longer and more linear polymeric chains containing the cubic silsesquioxane. These results were explained on the basis of the low initiation efficiency of benzyl chloride groups for PMMA, leading to polymers with molecular weights (Mn) and polydispersities (PDI) higher than the expected ones.ABM, ABC, ABPol2002-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000300005Materials Research v.5 n.3 2002reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392002000300005info:eu-repo/semantics/openAccessCosta,Ricardo O.R.Vasconcelos,Wander L.Laine,Richard M.eng2002-11-06T00:00:00Zoai:scielo:S1516-14392002000300005Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2002-11-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
title Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
spellingShingle Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
Costa,Ricardo O.R.
polymer hybrid
structural control
cubic silsesquioxane
ATRP
title_short Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
title_full Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
title_fullStr Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
title_full_unstemmed Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
title_sort Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
author Costa,Ricardo O.R.
author_facet Costa,Ricardo O.R.
Vasconcelos,Wander L.
Laine,Richard M.
author_role author
author2 Vasconcelos,Wander L.
Laine,Richard M.
author2_role author
author
dc.contributor.author.fl_str_mv Costa,Ricardo O.R.
Vasconcelos,Wander L.
Laine,Richard M.
dc.subject.por.fl_str_mv polymer hybrid
structural control
cubic silsesquioxane
ATRP
topic polymer hybrid
structural control
cubic silsesquioxane
ATRP
description We have developed a method to obtain polymer hybrids with control of inorganic content and molecular configuration. Hybrid poly(methyl methacrylate) (PMMA) was obtained via atom transfer radical polymerization (ATRP) initiated by octafunctional cubic silsesquioxanes using CuCl as catalyst. Two different ATRP initiators obtained by attaching specific chemical groups to the cubic silsesquioxane were employed to produce two types of hybrids with different architectures. While a-bromide ester groups generated a star-shaped polymer, the benzyl chloride groups produced longer and more linear polymeric chains containing the cubic silsesquioxane. These results were explained on the basis of the low initiation efficiency of benzyl chloride groups for PMMA, leading to polymers with molecular weights (Mn) and polydispersities (PDI) higher than the expected ones.
publishDate 2002
dc.date.none.fl_str_mv 2002-09-01
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=S1516-14392002000300005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000300005
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392002000300005
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.5 n.3 2002
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
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