Determination of acrylate latex stability by analyzing surface properties and intermolecular interactions
Polimery 1996, No 5, 290
The forces contributing to there pulsive and attractive interactions of macromolecules in acrylate latexes have been analyzed. The electrostatic repulsion forces, enthalpy and entropy effects and the attractive forces resulting from the expanded Hamaker equation were analyzed. The physicochemical properties and stability of the latexes were studied in relation to the structure of the copolymers comprising alkylacrylate or alkyl methacrylate mers (methyl through n-butyl) and acrylic ormethacrylic acid. The experimental results and calculations showed two mechanisms to be responsible for latex stability. The first mechanism (ionic stabilization) involves adsorption of the anionic emulsifier particles; the second mechanism (ionic-steric stabilization) involves adsorption of such an emulsifier on the layer of adsorbed macromolecules of the latex-forming polymer.
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