Effect of annealed titania on dielectric and mechanical properties of ethylene propylene diene monomer-titania nanocomposites

Abstract

Flexible ethylene propylene diene monomer (EPDM)-titania nanocomposites of different compositions were prepared by room temperature mixing using both neat and annealed titania. All these composites showed composition-dependent dielectric and mechanical properties, and composites with controlled dielectric properties could be made through judicial adjustment of the composition. The effect of moisture/filler heat treatment was also studied and found that composites with annealed titania showed lower dielectric constant than composites with normal titania. There was a significant improvement in mechanical properties, where composites with 60 parts per hundred parts of titania gave the optimum tensile strength. The particle size of titania particles was analyzed by high-resolution transmission electron microscopy (HRTEM) and a dynamic light scattering technique. The morphology and dispersion of titania particles in the EPDM matrix were studied by field emission scanning electron microscopy and HRTEM. Finally, different dielectric models were compared with experimental data, and the best match was achieved by the Lichtenecker model, which can be used as a predictive rule for different volume contents of titania filler in the EPDM matrix.

High density polyethylene and metal oxides based nanocomposites for high voltage cable application

“…There are 35% and 47.2% increment in tensile strength at 4 phr loading of nanofillers for HA4 and HT4 composites, respectively compared to neat HDPE. The initial increment of tensile strength may be because of reinforcing nature of nanofillers and their good dispersion within the polymer matrix 4,25,26 . At high loading, there may be agglomeration of fillers' particles within the polymer matrix that has resulted in the lowering of strength value after a particular filler loading for HDPE/Al 2 O 3 and HDPE/TiO 2 nanocomposites 4 .…”

“…Actually, the dielectric property of a material is because of the generation of polarization within the material in the direction of applied electric field. These polarizations may be atomic type, molecular type or interface type or electrode type polarization 25,28 . The added fillers particles within the polymer matrix act as a nano capacitor.…”

Polydimethylsiloxane–PbZr0.52Ti0.48O3 nanocomposites with high permittivity: Effect of poling and temperature on dielectric properties

“…Polymer–piezoceramic composites have attracted great attention and have different potential applications like sensor and actuator materials . The incorporation of electroceramic filler particles in the polymer matrix have attracted great attention of many researchers due to their promising applications such as flexible electronics, temperature/pressure sensor, actuators, and hydrophones .…”

Natural rubber composites containing low and high dielectric constant fillers and their application as substrates for compact flexible antennas

“…From mechanical test, Nayak et al 18 have shown that the properties depend on both composition and mixing methods. Nayak et al 19 have investigated the dielectric and mechanical properties of the poly(dimethylsiloxane)–titania nanocomposites, and Nayak et al 20 show the same properties of ethylene–propylene–diene monomer–titania nanocomposites. The measurements and analyses listed above do not imply any possible application of the composites obtained in flexible antennas.…”