Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic
Autor(a) principal: | |
---|---|
Data de Publicação: | 1999 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Polímeros (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14281999000400013 |
Resumo: | This paper presents the synthesis and characterization of polyimides, which contain a 4,4'-hexafluoroisopropylidene-bisphthalic anhydride (6FDA) unit in the backbone. These polyimides are a result of the use of the traditional method of "one step". The reactions occur between equimolar of a dianhydride and an aromatic diamine in presence of the solvent dimethylacetamide (DMAc), then cyclo-dehydrided by adding the acetic anhydride and pyridine. In this work, the 6FDA was used as the dianhydride and four different diamines were investigated: 3,3',5,5'-Tetramethyl-2,2- bis[4-( 4-aminophenoxy) phenyl] propane; 2,2-bis[4-(4-aminophenoxy)-phenyl] hexafluoropropane; 1,3-bis(4-aminophenoxy)benzene and 2,2'-dimethyl-4,4'-bis(4-aminophenoxy)biphenyl. The four polyimides (PA, PB, PC and PD) were characterized by tensile strength, infrared, inherent viscosity, Differential Scanning Calorimeter (DSC) to get the glassy transition temperature (Tg) and Gel Permeation Chromatograph (GPC) to obtain the average molecular weight (Mn). |
id |
ABPO-1_2be39cfb3b0e055a8cc59a95b887f87c |
---|---|
oai_identifier_str |
oai:scielo:S0104-14281999000400013 |
network_acronym_str |
ABPO-1 |
network_name_str |
Polímeros (São Carlos. Online) |
repository_id_str |
|
spelling |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalicSynthesispolyimidesdianhydridediaminecharacterization6FDAThis paper presents the synthesis and characterization of polyimides, which contain a 4,4'-hexafluoroisopropylidene-bisphthalic anhydride (6FDA) unit in the backbone. These polyimides are a result of the use of the traditional method of "one step". The reactions occur between equimolar of a dianhydride and an aromatic diamine in presence of the solvent dimethylacetamide (DMAc), then cyclo-dehydrided by adding the acetic anhydride and pyridine. In this work, the 6FDA was used as the dianhydride and four different diamines were investigated: 3,3',5,5'-Tetramethyl-2,2- bis[4-( 4-aminophenoxy) phenyl] propane; 2,2-bis[4-(4-aminophenoxy)-phenyl] hexafluoropropane; 1,3-bis(4-aminophenoxy)benzene and 2,2'-dimethyl-4,4'-bis(4-aminophenoxy)biphenyl. The four polyimides (PA, PB, PC and PD) were characterized by tensile strength, infrared, inherent viscosity, Differential Scanning Calorimeter (DSC) to get the glassy transition temperature (Tg) and Gel Permeation Chromatograph (GPC) to obtain the average molecular weight (Mn).Associação Brasileira de Polímeros1999-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14281999000400013Polímeros v.9 n.4 1999reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/S0104-14281999000400013info:eu-repo/semantics/openAccessHung,Daniel Liu ChunHo,Tong-IngLiaw,Der-JangLiaw,Been-Yangeng2003-05-21T00:00:00Zoai:scielo:S0104-14281999000400013Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2003-05-21T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false |
dc.title.none.fl_str_mv |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic |
title |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic |
spellingShingle |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic Hung,Daniel Liu Chun Synthesis polyimides dianhydride diamine characterization 6FDA |
title_short |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic |
title_full |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic |
title_fullStr |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic |
title_full_unstemmed |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic |
title_sort |
Synthesis and characterization of polyimides containing 4,4'-hexafluoroisopropylidene-bisphthalic |
author |
Hung,Daniel Liu Chun |
author_facet |
Hung,Daniel Liu Chun Ho,Tong-Ing Liaw,Der-Jang Liaw,Been-Yang |
author_role |
author |
author2 |
Ho,Tong-Ing Liaw,Der-Jang Liaw,Been-Yang |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Hung,Daniel Liu Chun Ho,Tong-Ing Liaw,Der-Jang Liaw,Been-Yang |
dc.subject.por.fl_str_mv |
Synthesis polyimides dianhydride diamine characterization 6FDA |
topic |
Synthesis polyimides dianhydride diamine characterization 6FDA |
description |
This paper presents the synthesis and characterization of polyimides, which contain a 4,4'-hexafluoroisopropylidene-bisphthalic anhydride (6FDA) unit in the backbone. These polyimides are a result of the use of the traditional method of "one step". The reactions occur between equimolar of a dianhydride and an aromatic diamine in presence of the solvent dimethylacetamide (DMAc), then cyclo-dehydrided by adding the acetic anhydride and pyridine. In this work, the 6FDA was used as the dianhydride and four different diamines were investigated: 3,3',5,5'-Tetramethyl-2,2- bis[4-( 4-aminophenoxy) phenyl] propane; 2,2-bis[4-(4-aminophenoxy)-phenyl] hexafluoropropane; 1,3-bis(4-aminophenoxy)benzene and 2,2'-dimethyl-4,4'-bis(4-aminophenoxy)biphenyl. The four polyimides (PA, PB, PC and PD) were characterized by tensile strength, infrared, inherent viscosity, Differential Scanning Calorimeter (DSC) to get the glassy transition temperature (Tg) and Gel Permeation Chromatograph (GPC) to obtain the average molecular weight (Mn). |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-12-01 |
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=S0104-14281999000400013 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14281999000400013 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0104-14281999000400013 |
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 |
Associação Brasileira de Polímeros |
publisher.none.fl_str_mv |
Associação Brasileira de Polímeros |
dc.source.none.fl_str_mv |
Polímeros v.9 n.4 1999 reponame:Polímeros (São Carlos. Online) instname:Associação Brasileira de Polímeros (ABPol) instacron:ABPO |
instname_str |
Associação Brasileira de Polímeros (ABPol) |
instacron_str |
ABPO |
institution |
ABPO |
reponame_str |
Polímeros (São Carlos. Online) |
collection |
Polímeros (São Carlos. Online) |
repository.name.fl_str_mv |
Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol) |
repository.mail.fl_str_mv |
||revista@abpol.org.br |
_version_ |
1754212583228833792 |