Synthesis and Characterization of Silsesquioxane-Based Polymer Hybrids with Controlled Structure
Autor(a) principal: | |
---|---|
Data de Publicação: | 2002 |
Outros Autores: | , |
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. |
id |
ABMABCABPOL-1_f2e52fa2d5271d6a57b86e4232930e6f |
---|---|
oai_identifier_str |
oai:scielo:S1516-14392002000300005 |
network_acronym_str |
ABMABCABPOL-1 |
network_name_str |
Materials research (São Carlos. Online) |
repository_id_str |
|
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 |
_version_ |
1754212656974135296 |