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Influence of nanoparticle morphology on reaction kinetics, particle size and rheology in acrylic latex

Published online by Cambridge University Press:  16 March 2015

Mireya L. Hernandez-Vargas ,
Angel Romo-Uribe  and
Jamil Baghdachi
Mireya L. Hernandez-Vargas
Affiliation:
Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca Mor. 62210, MEXICO. Departamento de Ingeniería Química Metalúrgica, Facultad de Química, Universidad Nacional Autonoma de Mexico, Mexico D.F. 04510, MEXICO.
Angel Romo-Uribe*
Affiliation:
Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca Mor. 62210, MEXICO.
Jamil Baghdachi
Affiliation:
Coatings Research Institute, Eastern Michigan University, Ypsilanti MI 48197, U.S.A.
*
*To whom correspondence should be addressed: aromo-uribe@fis.unam.mx
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Abstract

Organic/inorganic (O/I) composite latexes combine the best attributes of inorganic solids with the processability, lightweight and handling advantages of organic polymers. There are common methods to produce polymer nanocomposites: melt compounding, in-situ polymerization and solution mixing. Emulsion polymerization is an unique chemical process widely used to produce waterborne resins with various colloidal and physicochemical properties. This free radical polymerization process involves emulsification of the relatively hydrophobic monomer in water by an oil-in-water emulsifier, followed by the initiation reaction with a water insoluble initiator. This research focuses on the synthesis and reactions kinetics of polyacrylic latex with the incorporation of various nanospheres (SiO2, TiO2, Al2O3 and Fe2O3), and layered silicate (Bentonite nanoclay) nanoparticles via emulsion polymerization. The influence of nanoparticle concentration on reaction kinetics was also investigated. The results showed that the concentration of nanoparticles has significant influence on the monomer conversion, particle size, coagulum content and viscosity of the emulsion. Furthermore, the nanostructured emulsions were shear thinning, exhibiting a power-law behavior, and the viscosity was influenced by the nanoparticle morphology.

Keywords

coatingpolymerizationnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1767: Symposium 5C – New Trends in Polymer Chemistry and Characterization , 2015 , pp. 17 - 22
Copyright
Copyright © Materials Research Society 2015 

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References

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