Synthesis and characterization of isoprene oligomers to compare different production chemical processes
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
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=S0104-14282019000100404 |
Resumo: | Abstract Three methods to obtain isoprene oligomers were evaluated: chemical degradation of non-vulcanized coagulated natural rubber; chemical degradation of natural rubber latex; and oligomerization of the isoprene monomer. The products were characterized by infrared spectrometry (FTIR), nuclear magnetic resonance (NMR) and size-exclusion chromatography (SEC). All the three processes were efficient and can be controlled in order to obtain products with desired molar mass. Among the degradation processes, the reaction with the non-vulcanized rubber led to the purest products, but this process has the disadvantage of relatively higher catalyst cost of the catalyst. Reactions of isoprene with free radical initiation produced oligomers under specific conditions: low isoprene concentration, low initiator concentration, and xylene as solvent. The results discussed here allows the readers to have a chemistry overview and experimental insights about different chemical routes to obtain isoprene oligomers, compiled together in the same work. It shall be helpful for applied chemistry researches. |
id |
ABPO-1_4ef78f3a7f566b31f369b29c2c39f3c0 |
---|---|
oai_identifier_str |
oai:scielo:S0104-14282019000100404 |
network_acronym_str |
ABPO-1 |
network_name_str |
Polímeros (São Carlos. Online) |
repository_id_str |
|
spelling |
Synthesis and characterization of isoprene oligomers to compare different production chemical processesnatural rubberdegradationsynthesisisoprene oligomersAbstract Three methods to obtain isoprene oligomers were evaluated: chemical degradation of non-vulcanized coagulated natural rubber; chemical degradation of natural rubber latex; and oligomerization of the isoprene monomer. The products were characterized by infrared spectrometry (FTIR), nuclear magnetic resonance (NMR) and size-exclusion chromatography (SEC). All the three processes were efficient and can be controlled in order to obtain products with desired molar mass. Among the degradation processes, the reaction with the non-vulcanized rubber led to the purest products, but this process has the disadvantage of relatively higher catalyst cost of the catalyst. Reactions of isoprene with free radical initiation produced oligomers under specific conditions: low isoprene concentration, low initiator concentration, and xylene as solvent. The results discussed here allows the readers to have a chemistry overview and experimental insights about different chemical routes to obtain isoprene oligomers, compiled together in the same work. It shall be helpful for applied chemistry researches.Associação Brasileira de Polímeros2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282019000100404Polímeros v.29 n.1 2019reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/0104-1428.04418info:eu-repo/semantics/openAccessPires,Renata VieiraPessoa,Larissa Mota BarrosSant’Anna,Monica de Almeida deFainleib,AlexanderNunes,Rita de Cassia PessanhaLucas,Elizabete Fernandeseng2019-03-13T00:00:00Zoai:scielo:S0104-14282019000100404Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2019-03-13T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false |
dc.title.none.fl_str_mv |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes |
title |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes |
spellingShingle |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes Pires,Renata Vieira natural rubber degradation synthesis isoprene oligomers |
title_short |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes |
title_full |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes |
title_fullStr |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes |
title_full_unstemmed |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes |
title_sort |
Synthesis and characterization of isoprene oligomers to compare different production chemical processes |
author |
Pires,Renata Vieira |
author_facet |
Pires,Renata Vieira Pessoa,Larissa Mota Barros Sant’Anna,Monica de Almeida de Fainleib,Alexander Nunes,Rita de Cassia Pessanha Lucas,Elizabete Fernandes |
author_role |
author |
author2 |
Pessoa,Larissa Mota Barros Sant’Anna,Monica de Almeida de Fainleib,Alexander Nunes,Rita de Cassia Pessanha Lucas,Elizabete Fernandes |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Pires,Renata Vieira Pessoa,Larissa Mota Barros Sant’Anna,Monica de Almeida de Fainleib,Alexander Nunes,Rita de Cassia Pessanha Lucas,Elizabete Fernandes |
dc.subject.por.fl_str_mv |
natural rubber degradation synthesis isoprene oligomers |
topic |
natural rubber degradation synthesis isoprene oligomers |
description |
Abstract Three methods to obtain isoprene oligomers were evaluated: chemical degradation of non-vulcanized coagulated natural rubber; chemical degradation of natural rubber latex; and oligomerization of the isoprene monomer. The products were characterized by infrared spectrometry (FTIR), nuclear magnetic resonance (NMR) and size-exclusion chromatography (SEC). All the three processes were efficient and can be controlled in order to obtain products with desired molar mass. Among the degradation processes, the reaction with the non-vulcanized rubber led to the purest products, but this process has the disadvantage of relatively higher catalyst cost of the catalyst. Reactions of isoprene with free radical initiation produced oligomers under specific conditions: low isoprene concentration, low initiator concentration, and xylene as solvent. The results discussed here allows the readers to have a chemistry overview and experimental insights about different chemical routes to obtain isoprene oligomers, compiled together in the same work. It shall be helpful for applied chemistry researches. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
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=S0104-14282019000100404 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282019000100404 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0104-1428.04418 |
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.29 n.1 2019 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_ |
1754212590849884160 |