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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of itaconic and fumaric acids on the emulsion copolymerization of styrene with n-butyl acrylate to produce cementitious mortar

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Author(s):
Samuel Augusto dos Santos [1] ; Marlon Sandro dos Santos [2] ; Maurício Pinheiro de Oliveira [3]
Total Authors: 3
Affiliation:
[1] Universidade Federal de São Paulo-UNIFESP. Instituto de Ciência e Tecnologia. Laboratório de Síntese de Polímeros - Brasil
[2] BASF S.A.. Laboratório de Pesquisa e Desenvolvimento de Polímeros - Brasil
[3] Universidade Federal de São Paulo-UNIFESP. Instituto de Ciência e Tecnologia. Laboratório de Síntese de Polímeros - Brasil
Total Affiliations: 3
Document type: Journal article
Source: MATERIA-RIO DE JANEIRO; v. 24, n. 3 2019-09-16.
Abstract

ABSTRACT Carboxylic monomers are often employed in polymer formulations obtained by emulsion or miniemulsion polymerization with the aim of improve the better latex application properties. The aim of this work was to evaluate the effect of itaconic (IA), fumaric (FA) and methacrylic (MAA) acid on the emulsion copolymerization of styrene (STy) with n-butyl acrylate (ABu), aiming to obtain stable latexes with low concentration of poly(carboxylic acid) in the aqueous phase, to be used as cement additive. Latexes of STy/ABu/AI, STy/ABu/AF and Sty/ABu/AMA were obtained and characterized in relation to solids content, particle diameter, polydispersity, viscosity, minimum film forming temperature (TMFF), freeze-thaw stability, colloidal stability and distribution of the carboxylic groups. Cementitious mortar was prepared with the latexes and evaluated. The results obtained show that the type of carboxylic acid employed affects the physicochemical properties of latexes and the interaction with the components of the mortar. Among the acids studied, methacrylic acid had a lower effect on the colloidal properties of latexes. The latex produced with fumaric acid presented low colloidal stability, high concentration of carboxylic groups in the aqueous phase and low interaction with the components of the cementitious mortar. (AU)

FAPESP's process: 13/25619-3 - Synthesis of stimuli-responsive polymer nanoparticles obtained by emulsion and miniemulsion polymerization for production of recycable carpet
Grantee:MAURÍCIO PINHEIRO DE OLIVEIRA
Support Opportunities: Regular Research Grants