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Type: Artigo de periódico
Title: Latex fractionation by sedimentation and colloidal crystallization: The case of poly(styrene-co-acrylamide)
Author: Teixeira-Neto, E
Leite, CAP
Cardoso, AH
da Silva, MDVM
Braga, M
Galembeck, F
Abstract: Poly(styrene-co-acrylamide) (PS-AAM) latex was prepared, fractionated by sedimentation under gravity, and characterized by PCS, infrared spectra, secondary and backscattered electron imaging in the scanning electron microscope, and electron spectroscopy imaging in an analytical transmission electron microscope. Three latex fractions were obtained. The lower fraction was opalescent and its particles were the more uniform, concerning size, chemical composition, and topochemical features. This lower fraction was still further fractionated by zonal centrifugation in a density gradient, yielding two fractions with similar macrocrystal-forming abilities but different sizes and chemical compositions. These results confirm those previously obtained for the PS-HEMA latex. (C) 2000 Academic Press.
Subject: poly(styrene-co-acrylamide) latex
anisotropic particles
latex fractionation
colloidal crystallization
core-and-shell latex
Country: EUA
Editor: Academic Press Inc
Rights: fechado
Identifier DOI: 10.1006/jcis.2000.7135
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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