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Morphology and Mechanical Properties of Polyacrylic-Silica Nanocomposites

Published online by Cambridge University Press:  03 May 2016

A. Reyes-Mayer ,
JA. Arcos Casarrubias ,
R. Guardian-Tapia  and
A. Romo-Uribe
A. Reyes-Mayer
Affiliation:
Laboratorio de Nanopolimeros y Coloides, UNAM, 62210. MEXICO. Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, 62209. MEXICO.
JA. Arcos Casarrubias
Affiliation:
División de Ingeniería Química y Bioquímica, Tecnológico de Estudios Superiores de Ecatepec, Edo. de Mex. 55210, MEXICO.
R. Guardian-Tapia
Affiliation:
Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, 62209. MEXICO.
A. Romo-Uribe*
Affiliation:
Laboratorio de Nanopolimeros y Coloides, UNAM, 62210. MEXICO.
*
†To whom all correspondence should be addressed: [email protected]
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Abstract

Organic-inorganic hybrid nanocomposites are considered a new generation of high performance materials because they combine both the advantages of inorganic materials (stiffness, high thermal stability, barrier properties, optical, catalytic, electrical and thermal conductivity among others) and organic polymers (flexibility, dielectric, toughness, lightweight, processing). Each part of a nanocomposite has a synergistic function in its performance and has much better combination properties than a single material. We report on the thermo-mechanical properties and morphology of polyacrylic-nanosilica (SiO2) composites prepared in-situ via emulsion polymerization, using a semi-continuous mode. The latex emulsion thus obtained was stable for at least six months. Moreover, this process produced controlled molecular weight in the final latex and low formation of agglomerates. Films drawn from the latex exhibited excellent optical transparency, suggesting good dispersion of the nanosilica, and confirmed by scanning electron microscopy (SEM). There was an increase in glass transition temperature, Tg, suggesting a modification of molecular dynamics; hydrophobic behavior, as probed by water contact angle, was also promoted. Moreover, the Young’s modulus of the nanostructured latex films increased up to 57% with only 3 wt% nanosilica, therefore denoting a reinforcing effect of the nanoparticles.

Keywords

coatingpolymernanostructure
Type
Articles
Information
MRS Advances , Volume 1 , Issue 21: Nanomaterials and Synthesis , 2016 , pp. 1577 - 1582
Copyright
Copyright © Materials Research Society 2016 

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References

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