Synthesis and thermophysical studies of polyanilines

Abstract

Aniline was polymerized under different experimental conditions such as interfacial polymerization, rapid mixing in hydrochloric acid medium and classical bulk polymerization method using p-toluene sulphonic acid. The resulting polyanilines were characterized by infrared, X-ray diffraction, conductance and scanning electron microscopic analysis. The main emphasis of the paper is to study the thermal response of the synthesized polyanilines by thermogravimetric analysis and differential scanning calorimetry (DSC). The DSC data were utilized further to calculate the specific heat capacities of the synthesized polyanilines as a function of temperature.

Cosolvents Impact on some Properties of the Solutions and the Films of Succinamide Chitosan

“…The shape of DTA curves (Fig. 5) confirms that the thermal destruction of the prepared PAn and G-PAn composites is an exothermic process [47,49,50] and suggests the change of specific heat capacity during heating [50]. For pure G dependence of specific heat capacity on temperature is not so pronounced (in Fig.…”

“…Small endothermic peaks at ~353 and ~504 K are found on DTA curves too. Exothermic maximum at temperature higher than 513 K corresponds to the onset of the thermal and oxidative destruction of PAn oligomeric molecules [45][46][47][48][49][50]. Broad endothermic peak within 773-1053 K corresponds to release of PAn decomposition products.…”

Thermo-physical Investigations of oils, N-(2-aminoethyl)oleamide and Resulting Gels using TGA-DSC

“…On the other hand, DSC has advantage not only for thermodynamic analysis, but also for isothermal analysis of the system. Notably, the DSC profiles can also be explored towards the determination of one of the most important thermodynamic properties, i.e., specific heat capacity very systematically [15][16][17] . In the following pages, the specific heat capacity data for the studied systems are presented and discussed.…”

Exploring Thermal Gravimetric Analysis Data Towards the Determination of Non-Isothermal Kinetics of Oxalic Acid

“…The technique marks its mportance where the transformations have been indulging in the absorption or emission of gases from a sample or material in condensed phase. The exploration of the thermal data towards kinetic analysis of thermal decomposition processes have seizes an attention of quite a large number of investigators (Patil K, et al,2019;Gupta G., et al,2018;Tomar P., et al,2020). The interest has been fully reasonable.…”