Electrical properties of natural fiber graft co-polymer reinforced phenol formaldehyde composites

The electrical properties of Hibiscus Sabdariffa grafted co-polymer reinforced phenol formaldehyde composite were studied with reference to dielectric constant, dielectric dissipation factor, dielectric loss factor and volume resistivity. The dielectric constant was found to decrease with frequency that was due to decrease of polarization. The dissipation factor showed first increase and then decrease with increase in frequency at different voltage. The volume resistivity of composite also decreased with frequency. The dielectric loss factor was observed to be high at lower frequency which was due to polarization of fiber at lower frequency.