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Title: An ESEM investigation of latex film formation in cement pore solution

Abstract

Environmental scanning electron microscopy (ESEM) and complementary methods were employed to study the time dependent film formation of a latex dispersion in water and cement pore solution. First, a model carboxylated styrene/n-butyl acrylate latex dispersion possessing a minimum film forming temperature (MFFT) of 18 {sup o}C was synthesized in aqueous media via emulsion polymerization. Its film forming property was at a temperature of 40 {sup o}C, studied under an ESEM. The analysis revealed that upon removal of water, film formation occurs as a result of particle packing, particle deformation and finally particle coalescence. Film formation is significantly retarded when the latex dispersion is present in cement pore solution. This effect can be ascribed to adsorption of Ca{sup 2+} ions onto the surface of the anionic latex particles and to interfacial secondary phases. This layer of adsorbed Ca{sup 2+} ions hinders interdiffusion of the macromolecules and subsequent film formation of the latex polymer.

Authors:
;
Publication Date:
OSTI Identifier:
21490053
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 41; Journal Issue: 2; Other Information: DOI: 10.1016/j.cemconres.2010.11.005; PII: S0008-8846(10)00248-6; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0008-8846
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACRYLATES; ADSORPTION; CALCIUM IONS; CEMENTS; COALESCENCE; DEFORMATION; EMULSIONS; FILMS; LATEX; LAYERS; POLYMERIZATION; SCANNING ELECTRON MICROSCOPY; STOWING; STYRENE; SURFACES; TEMPERATURE RANGE 0273-0400 K; TIME DEPENDENCE; WATER; ALKYLATED AROMATICS; AROMATICS; BUILDING MATERIALS; CARBOXYLIC ACID SALTS; CHARGED PARTICLES; CHEMICAL REACTIONS; COLLOIDS; DISPERSIONS; ELASTOMERS; ELECTRON MICROSCOPY; HYDROCARBONS; HYDROGEN COMPOUNDS; IONS; MATERIALS; MICROSCOPY; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; POLYMERS; RUBBERS; SORPTION; TEMPERATURE RANGE

Citation Formats

Gretz, M, and Plank, J. An ESEM investigation of latex film formation in cement pore solution. United States: N. p., 2011. Web. doi:10.1016/j.cemconres.2010.11.005.
Gretz, M, & Plank, J. An ESEM investigation of latex film formation in cement pore solution. United States. https://doi.org/10.1016/j.cemconres.2010.11.005
Gretz, M, and Plank, J. 2011. "An ESEM investigation of latex film formation in cement pore solution". United States. https://doi.org/10.1016/j.cemconres.2010.11.005.
@article{osti_21490053,
title = {An ESEM investigation of latex film formation in cement pore solution},
author = {Gretz, M and Plank, J},
abstractNote = {Environmental scanning electron microscopy (ESEM) and complementary methods were employed to study the time dependent film formation of a latex dispersion in water and cement pore solution. First, a model carboxylated styrene/n-butyl acrylate latex dispersion possessing a minimum film forming temperature (MFFT) of 18 {sup o}C was synthesized in aqueous media via emulsion polymerization. Its film forming property was at a temperature of 40 {sup o}C, studied under an ESEM. The analysis revealed that upon removal of water, film formation occurs as a result of particle packing, particle deformation and finally particle coalescence. Film formation is significantly retarded when the latex dispersion is present in cement pore solution. This effect can be ascribed to adsorption of Ca{sup 2+} ions onto the surface of the anionic latex particles and to interfacial secondary phases. This layer of adsorbed Ca{sup 2+} ions hinders interdiffusion of the macromolecules and subsequent film formation of the latex polymer.},
doi = {10.1016/j.cemconres.2010.11.005},
url = {https://www.osti.gov/biblio/21490053}, journal = {Cement and Concrete Research},
issn = {0008-8846},
number = 2,
volume = 41,
place = {United States},
year = {Tue Feb 15 00:00:00 EST 2011},
month = {Tue Feb 15 00:00:00 EST 2011}
}