Thermal studies of DBSA-doped polyaniline/PVC blends by isothermal microcalorimetry
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A series of blends of dodecylbenzenesulfonic acid (DBSA)-doped polyaniline (PANDR) and PVC were synthesized by solution blending technique and investigated by heatflow microcalorimetry (HFC) for thermal and oxidative stability and for PVC–PANDR compatibility. FTIR results provided evidence for strong dipole–dipole interactions between PANDR and PVC. The energy of the oxidation is independent of the composition. The interaction energy and thermal stability increased with the increase of PANDR content in the blend. The activation energies calculated by using Arrhenius relationship can be employed for accelerated ageing of the synthesized blends. It has been observed that the average degradation of PANDR component is higher than that of PVC.
KeywordsBlends Microcalorimetry HFC Polyaniline
We are grateful to Higher Education Commission (HEC) of Pakistan for the financial support through indigenous scholarship scheme for Ph. D. studies of Asma Binat Afzal in science and technology (Batch II). We are thankful to Dr. Dan Forsström for his help in the experiment and useful discussions.
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