ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Conductivity of the mixtures of emulsifier with acrylate or methacrylate as a measure of emulsion stability
Polymer Institute, Centre for Chemical Research,
Slovak Academy of Sciences, CS-842 36 Bratislava
Abstract: The emulsification of vinyl monomers, such as acrylonitrile, methyl
methacrylate, butyl acrylate, ethyl acrylate and two different comonomer
mixtures of ethyl acrylate and methyl methacrylate was studied by the
conductometric titration method.
The dependence of the conductivity on the monomer concentration for
a given emulsifier amount of substance ratio nonionic: anionic is described
by a curve with minimum and maximum.
Fluctuations in the conductivity are expected to result from the solubilization of monomer in emulsifier micelles, from the releasing or tying up
the most conductive species from the aqueous phase, from the changes of the
surface particle layer and of the molecular volumes for monomers and from
the phase inversion and emulsifier transfer between phases.
The most stable monomer emulsion was formed in the system containing
the most water-soluble monomer.
It was found that a pre-emulsification process is time-dependent and is
one of the important characteristics of the emulsion polymerization.
Full paper in Portable Document Format: 423a347.pdf
Chemical Papers 42 (3) 347–354 (1988)
Thursday, February 25, 2021