Stability of Polymer–Monomer Particles of Synthetic Latexes

The presence of “living” macroradicals in the volume of a polymer–monomer particle may be one of the factors responsible for the loss of the aggregative stability of latexes. If the adsorption protection of a polymer–monomer particle is insufficient, high content of “living” macroradicals leads to g...

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Veröffentlicht in:Russian journal of applied chemistry 2018-10, Vol.91 (10), p.1642-1653
Hauptverfasser: Kraynik, I. I., Beresnev, V. N., Agibalova, L. V., Kurova, A. V.
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container_end_page 1653
container_issue 10
container_start_page 1642
container_title Russian journal of applied chemistry
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creator Kraynik, I. I.
Beresnev, V. N.
Agibalova, L. V.
Kurova, A. V.
description The presence of “living” macroradicals in the volume of a polymer–monomer particle may be one of the factors responsible for the loss of the aggregative stability of latexes. If the adsorption protection of a polymer–monomer particle is insufficient, high content of “living” macroradicals leads to gelation in the latex in the course of storage. Correlation between the latex life time, hydration of nonionic surfactant molecules in the adsorption layer of a polymer–monomer particle, and extent of the action of the macroradicals was determined. Naphthalenesulfonic dispersing agents enhance the stability of latex systems in the step of polymerization and distillation of the monomers owing to a decrease in the critical micelle concentration of the emulsifier, to extension of the micellar period of the polymerization, to an increase in the degree of saturation of polymer–monomer particles, and to an increase in the probability of macroradical recombination in the volume of a polymer–monomer particle. With an increase in the degree of polycondensation of naphthalene-containing dispersing agents, their surface activity increases, whereas the ability to support the aggregative stability of latexes decreases.
doi_str_mv 10.1134/S1070427218100117
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subjects Adsorption
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Distillation
Emulsion polymerization
Gelation
Industrial Chemistry/Chemical Engineering
Latex
Macromolecular Compounds and Polymeric Materials
Micelles
Monomers
Naphthalene
Polymerization
Polymers
title Stability of Polymer–Monomer Particles of Synthetic Latexes
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