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

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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.

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Acknowledgements

ML Hernández-Vargas was supported by graduate scholarship from the Mexican Council for Science and Technology (CONACyT). This research was supported by DGAPA-UNAM under PAPIIT program, grant IN118514.

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Authors and Affiliations

  1. Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca Mor., 62210, Mexico

    Mireya L. Hernandez-Vargas & Angel Romo-Uribe

  2. Departamento de Ingeniería Química Metalúrgica, Facultad de Química, Universidad Nacional Autonoma de Mexico, Mexico D.F., 04510, Mexico

    Mireya L. Hernandez-Vargas

  3. Coatings Research Institute, Eastern Michigan University, Ypsilanti, MI, 48197, U.S.A.

    Jamil Baghdachi

Authors
  1. Mireya L. Hernandez-Vargas
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  2. Angel Romo-Uribe
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  3. Jamil Baghdachi
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Correspondence to Angel Romo-Uribe.

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Hernandez-Vargas, M.L., Romo-Uribe, A. & Baghdachi, J. Influence of nanoparticle morphology on reaction kinetics, particle size and rheology in acrylic latex. MRS Online Proceedings Library 1767, 17–22 (2015). https://doi.org/10.1557/opl.2015.222

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  • DOI: https://doi.org/10.1557/opl.2015.222

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