Oxidative Chemical Polymerization, Kinetic Study, Characterization and DFT Calculations of Para-Toluidine in Acid Medium Using K2Cr2O7 as Oxidizing Agent
Abstract: The synthesis of poly-p-toluidine (PpTO) by oxidative chemical polymerization using potassium dichromate as oxidizing agent was carried out. The optimum conditions for the polymerization reaction were investigated. The order of reactions and thermodynamic activation parameters were calculated. A molecular mechanism for the oxidation of p-toluidine using potassium dichromate is proposed. This mechanism explains the specific features of p-toluidine oligomerization and polymerization reactions. Spectroscopic studies using IR, UV–visand elemental analysis have evidenced the structure of polymeric chain. The surface morphology of the obtained polymer was characterized by X-ray diffraction and transmission electron microscopy (TEM). The thermo gravimetric analysis (TGA) was used to confirm the proposed structure and number of water molecules in each polymeric chain unit. Moreover, determinations of dielectric properties of the prepared polymer were carried out. The a.c conductivity (?ac) of (PpTO) was investigated as a function of frequency and temperature. The microscopic conduction mechanism of charge carries over the potential barrier in polymer backbone was found classical hopping model.
[S. M. Sayyah, H.M.Mustafa, A.H. El-Ghandour, A.A.Aboud and M.Y. Ali (2015); Oxidative Chemical Polymerization, Kinetic Study, Characterization and DFT Calculations of Para-Toluidine in Acid Medium Using K2Cr2O7 as Oxidizing Agent Int. J. of Adv. Res. 3 (4). 0] (ISSN 2320-5407). www.journalijar.com
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