On the mechanism of particle formation above the CMC in emulsion polymerization

The mechanism of particle nucleation has great influence on the kinetics and the particle size distribution of polymer latexes produced in emulsion polymerization. These are key aspects for the application of these products and for the development of emerging processes, such as living/controlled fre...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2018-03, Vol.75 (3), p.1027-1035
Main Authors: Carro, Shirley, Herrera-Ordonez, Jorge, Castillo-Tejas, Jorge
Format: Article
Language:English
Subjects:
Aqueous solutions
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Coagulation
Complex Fluids and Microfluidics
Conversion
Emulsion polymerization
Experiments
Nucleation
Organic Chemistry
Original Paper
Particle size
Particle size distribution
Physical Chemistry
Polymer Sciences
Polymers
Skewness
Soft and Granular Matter
Surfactants
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Summary:The mechanism of particle nucleation has great influence on the kinetics and the particle size distribution of polymer latexes produced in emulsion polymerization. These are key aspects for the application of these products and for the development of emerging processes, such as living/controlled free-radical polymerizations. One very popular theory publish in the 80s establishes that the new-born (primary) particles undergo limited coagulation even when the concentration of surfactant is above its critical micellar concentration. In this communication, the experiment that was the base for the formulation of such theory is reexamined and discussed to determine whether it can be considered as “typical condition”, such that the general character of their conclusions can be justified. In this context, the positive skewness of the PSD observed in that time and taken as an evidence of the coagulative nucleation is discussed as well.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-017-2075-2