Abstract
The electrical insulation of the manufacture sulfonated phenol-formaldehyde viscous material (product) has been studied with Polyvinyl-acetate (PVA) and toluene diisocyanate (TDI) blend has been prepared by fixing percentage by weight 3:1 and mixed with different percentages by weight of the product sulfonated phenol formaldehyde viscous mass (SPF). The Fourier transform infrared (FTIR) spectroscopy is done on (SPF) resin powder and prepared film of PVA-TDI-SPF viscous mass. The quality factor (Q), dissipation factor (D), parallel resistance (Rp), series resistance (Rs), parallel capacitance (Cp), series capacitance (Cs) and phase shift (?) are measured. The calculated maximum dielectric constant (??) is 3.49x107 at sample (1) wt.1% SPF viscous mass to the weight of (PVA-TDI), the minimum dielectric constant is 1.12x106 at sample (3) wt.3% of SPF viscous mass to PVA-TDI weight. The maximum dielectric loss factor (??) is 3.68x107 at sample (1) and the minimum dielectric loss is 2.04x106 for sample (3). The maximum conductance is 1.06x10-4 S at sample (1) and minimum conductance is 6.64x10-6 at sample (3). The maximum frequency dependent ac. conductivity (?ac) is 2.048 S m-1 for sample (1) and the minimum is 0.113 S m-1 at sample (3). The maximum total conductivity (?t) is 126.2 S m-1 for sample (1) and minimum (?t) is 1.129 S m-1 for sample (3). The maximum independent conductivity (?dc) is 124 S m-1 for sample (1) and minimum value is 1.015 S m-1 for sample (3). The maximum capacitive reactance (Xs) is 0.83 M? at sample (5) wt.5% SPF viscous mass to PVA-TDI weight and the minimum is 0.14 M? for sample (3).
Highlights
Dielectrics are class of materials that are highly resistive to electrical current
The prepared sulfonated phenolformaldehyde (SPF) viscous mass is added in percentages by weight to the blend and the compound is mixed by hand using thin glass rod and spatula until homogeneous mixtures are obtained and to ensure uniform thicknesses
Figure (7), the impedance vis capacitive reactance, the curve is rather alternative of the capacitive reactance with impedance of samples according to their wt% sulfonated phenol formaldehyde viscous mass (SPF) viscous mass to PVA-toluene diisocyanate (TDI) weight
Summary
A few simplified definitions of dielectric own qualities are important for the meaningful discussion of their measurements and applications. They have been defined previously in terms of electrical circuit concepts and electromagnetic field concepts. A material is classified as "dielectric" if it has the ability to store energy when an external electric field is applied. From the combination of different fibers or fillers with polymer matrices one can produce polymer-matrix composites, a material important to the electronic industry for its dielectric nature in the use of capacitors[5]. The investigation represents the dielectric measurement carried out on PVA-TDI-SPF mixture at frequency 1 kHz, and laboratory temperature, and to rationalize the dielectric own quality of PVA-TDI-SPF. The effect of different percentage by weight of SPF viscous mass on the electrical dielectric of PVA-TDI gives a significant results of Gs, ɛ′, ɛ′′, σac, σdc, σt and capacitive reactance
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