Semiconducting behaviour and Thermokinetic study of Newly Synthesized p- Nitrophenol-Melamine-Formaldehyde Terpolymer Resin

The resin (abbreviated as PNPMF) was derived from base catalyzed polycondensation of p-nitrophenol (0.1M), melamine (0.2M) and formaldehyde (0.4M) using 1M NaOH at 120-1250C. The terpolymer resin was characterised by using elemental analysis and spectral analysis. In the present paper, electrical conducting behaviour of terpolymer resin and thermal decomposition were studied over a wide range of temperature. On the basis of electrical conductivity measurement, semiconducting behaviour of terpolymeric resin were studied. Detailed thermal degradation study of the terpolymer was carried out to ascertain its thermal stability. The thermokinetic parameters were determined using Freeman-Carroll (FC) and Sharp Wentworth (SW) method in temperature range (286-4860C). The values of activation energies (Ea), entropy (ΔS), and free energies (ΔG) were in good agreement. The order of degradation reaction determined by FC method was confirmed by SW method.

Author(s): A. D. Kushwaha1, V. V. Hiwase2 andA. B. Kalambe1

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