Abstracts Book - IMRC 2018

• SA6-P043
MODELLING THE INFLUENCE OF THE INTERPHASE ON THE
ELECTRIC PROPERTIES OF POLYMER-MATRIX COMPOSITE
MATERIAL SYSTEMS
Myriam Paredes Olguin 1 , Miguel Angel Parra Mondragon 1 , Carlos Gomez Yanez 2 , Fermin
Pascual Espino Cortés 3
1
Universidad Politécnica del Valle de México, Nanotechnology Engineering, Mexico. 2 Escuela
Superior de Ingeniería Química e Industrias Extractivas, Department of Metallurgy and
Materials, Mexico. 3 Esime zacatenco, Sección de Estudios de Posgrado e Investigación, Mexico.
Interfaces play a critical role in all multicomponent materials, where a thorough
understanding of their role may contribute to significant progress, especially in
nanotechnology. The incorporation of inorganic nanoparticles in a polymer
matrix enhances the dielectric performance. The improved properties, which
the nanocomposites exhibit, are due to the behavior of the interfacial
interaction zone which surrounds the nanoparticles. Because of the high ratio
of surface to volume for nanoparticles, the interphase plays a predominant role
in
nanocomposites.
Silicone rubber composites filled with different kinds of micro an nano powders
were prepared and the effect of filler contents on the dielectric properties were
investigated. The composites presented higher values of relative permittivity
compared to pure silicone rubber as long the filler content increased. Based in
a power-law relation to calculate the permittivity of composites which consider
a factor for the particle shape, values for the interphase thickness and its value
at different filler loads, were calculated. Values between 14 to 19 nm were
estimated for the thickness of the interphase in the silica/silicone rubber
systems and permittivities in the range of 7 to 23 were found for the interphase
for compositions in the range of 2 to 10 vol%. From these values, some
predictions for the interphase permittivity at higher filler concentrations were
estimated.
Keywords: Interphase, Polymer-matrix composites, Computer simulation
Presenting authors email: myriampaol@gmail.com