Effect of Ca2+ions on the film formation of an anionic styrene/ n-butylacrylate latexpolymer in cement pore solution

Thomas Pavlitschek, Markus Gretz, Johann Plank

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Several methods were employed to study the time dependent film formation of a self synthesized anionic 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°C and a glass transition temperature (Tg) of 30 °C was synthesized via emulsion polymerization. Next, its film forming behaviour was studied at 40 °C, using an ESEM instrument. 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 hindered in synthetic cement pore solution. This effect can be ascribed to adsorption of Ca2+ ions onto the surface of the anionic latex particles and to interfacial secondary phases. This layer of adsorbed Ca2+ ions hinders interdiffusion of the macromolecules and subsequent film formation of the latex polymer.

Original languageEnglish
Title of host publicationProgress in Polymers in Concrete
Pages322-328
Number of pages7
DOIs
StatePublished - 2013
Externally publishedYes
Event14th International Congress on Polymers in Concrete, ICPIC 2013 - Shanghai, China
Duration: 17 Apr 201320 Apr 2013

Publication series

NameAdvanced Materials Research
Volume687
ISSN (Print)1022-6680

Conference

Conference14th International Congress on Polymers in Concrete, ICPIC 2013
Country/TerritoryChina
CityShanghai
Period17/04/1320/04/13

Keywords

  • Calcium ions
  • Cement pore solution
  • Film formation
  • Latex polymer

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