Influence of xylene on the dielectric response of an organoclay-containing nanocomposite

Abstract

The dielectric effect, investigated using dielectric spectroscopy and DC dielectric breakdown strength measurements, of introducing xylene into a composite system containing polyethylene, a co-polymer of ethylene and vinyl acetate and an organoclay can be understood in light of X-ray diffraction data. In dielectric spectroscopy, although organoclay alone changes the dielectric response of the polymer blend and xylene has no effect on the unfilled polymer blend, when both xylene and organoclay are present, a synergistic response is revealed at the 1 V(rms) amplitude voltage used to acquire the dielectric data. In contrast to this, in DC, dielectric breakdown strength measurements revealed that, under high field conditions, both the xylene and organoclay, independently, caused a decreased breakdown strength. This work was undertaken in order to examine the generality of the possible effects of labile, low molar mass impurities on electrical properties of comparable systems, which may be processed through solvent-based routes.

Keywords

• filled polymers
• polymer blends
• nanocomposites
• clay
• electric breakdown
• x-ray diffraction
• electric strength
• dielectric relaxation
• permittivity
• dielectric response
• organoclay-containing nanocomposite
• dielectric effect
• dielectric spectroscopy
• xylene
• composite system
• ethylene
• vinyl acetate
• x-ray diffraction data
• unfilled polymer blend
• synergistic response
• dc dielectric breakdown strength measurements
• polyethylene
• copolymer
• high field conditions
• low molar mass impurities
• electrical properties