PS-HEMA latex fractionation by sedimentation and colloidal crystallization

Detalhes bibliográficos
Autor(a) principal: Cardoso,André H.
Data de Publicação: 1999
Outros Autores: Leite,Carlos A.P., Galembeck,Fernando
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000600013
Resumo: A poly(styrene-co-hydroxyethylmethacrylate) latex underwent sedimentation under gravity followed by an spontaneous and extensive colloidal crystallization. It was then fractionated in three visually distinguishable layers. Latex aliquots layers were sampled at different heigths and the particles were characterized by PCS, microelectrophoresis, infrared spectra and analytical electron microscopy. The major fraction was opalescent and contained the colloidal crystals settled in the bottom of the liquid. Two other latex fractions were obtained, which differed in their chemical compositions, particle sizes and topochemical features from the self-arraying particles. Macrocrystallization of the fractionated latex yielded high quality crystals with a low frequency of defects, which confirms that particle chemical homogeneity is an important factor for particle self-arraying.
id SBQ-2_3591d5797e1ce5973cffb2bec77fde2a
oai_identifier_str oai:scielo:S0103-50531999000600013
network_acronym_str SBQ-2
network_name_str Journal of the Brazilian Chemical Society (Online)
repository_id_str
spelling PS-HEMA latex fractionation by sedimentation and colloidal crystallizationlatex fractionationcolloidal crystallizationlatex sedimentationcore-and-shell latexmacrocrystallatexA poly(styrene-co-hydroxyethylmethacrylate) latex underwent sedimentation under gravity followed by an spontaneous and extensive colloidal crystallization. It was then fractionated in three visually distinguishable layers. Latex aliquots layers were sampled at different heigths and the particles were characterized by PCS, microelectrophoresis, infrared spectra and analytical electron microscopy. The major fraction was opalescent and contained the colloidal crystals settled in the bottom of the liquid. Two other latex fractions were obtained, which differed in their chemical compositions, particle sizes and topochemical features from the self-arraying particles. Macrocrystallization of the fractionated latex yielded high quality crystals with a low frequency of defects, which confirms that particle chemical homogeneity is an important factor for particle self-arraying.Sociedade Brasileira de Química1999-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000600013Journal of the Brazilian Chemical Society v.10 n.6 1999reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50531999000600013info:eu-repo/semantics/openAccessCardoso,André H.Leite,Carlos A.P.Galembeck,Fernandoeng2001-06-01T00:00:00Zoai:scielo:S0103-50531999000600013Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2001-06-01T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv PS-HEMA latex fractionation by sedimentation and colloidal crystallization
title PS-HEMA latex fractionation by sedimentation and colloidal crystallization
spellingShingle PS-HEMA latex fractionation by sedimentation and colloidal crystallization
Cardoso,André H.
latex fractionation
colloidal crystallization
latex sedimentation
core-and-shell latex
macrocrystal
latex
title_short PS-HEMA latex fractionation by sedimentation and colloidal crystallization
title_full PS-HEMA latex fractionation by sedimentation and colloidal crystallization
title_fullStr PS-HEMA latex fractionation by sedimentation and colloidal crystallization
title_full_unstemmed PS-HEMA latex fractionation by sedimentation and colloidal crystallization
title_sort PS-HEMA latex fractionation by sedimentation and colloidal crystallization
author Cardoso,André H.
author_facet Cardoso,André H.
Leite,Carlos A.P.
Galembeck,Fernando
author_role author
author2 Leite,Carlos A.P.
Galembeck,Fernando
author2_role author
author
dc.contributor.author.fl_str_mv Cardoso,André H.
Leite,Carlos A.P.
Galembeck,Fernando
dc.subject.por.fl_str_mv latex fractionation
colloidal crystallization
latex sedimentation
core-and-shell latex
macrocrystal
latex
topic latex fractionation
colloidal crystallization
latex sedimentation
core-and-shell latex
macrocrystal
latex
description A poly(styrene-co-hydroxyethylmethacrylate) latex underwent sedimentation under gravity followed by an spontaneous and extensive colloidal crystallization. It was then fractionated in three visually distinguishable layers. Latex aliquots layers were sampled at different heigths and the particles were characterized by PCS, microelectrophoresis, infrared spectra and analytical electron microscopy. The major fraction was opalescent and contained the colloidal crystals settled in the bottom of the liquid. Two other latex fractions were obtained, which differed in their chemical compositions, particle sizes and topochemical features from the self-arraying particles. Macrocrystallization of the fractionated latex yielded high quality crystals with a low frequency of defects, which confirms that particle chemical homogeneity is an important factor for particle self-arraying.
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=S0103-50531999000600013
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000600013
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50531999000600013
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.10 n.6 1999
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
_version_ 1750318163819495424

Registros relacionados