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.
- 2.Gul VE. Structure and properties of conducting polymer composites. Utrecht, The Netherlands: VSP; 1996.Google Scholar
- 3.Shipway AN, Willner I. Nanoparticles as structural and functional units in surface-confined architectures. Chem Commun. 2001;2035–45.Google Scholar
- 11.MacDiarmid AG, Chiang JC, Richter AF, Somasiri NLD, Epstein AJ. Polyaniline: Synthesis and characterization of the emeraldine oxidation state by elemental analysis. In: Alcacer L, editor. Conducting polymers. Dordrecht: Reidel Publishing Co; 1987. p. 105–20.Google Scholar
- 13.Suurkuusk J, Wadso I. A multichannel microcalorimetry system. Chem Scr. 1982;20:155–63.Google Scholar
- 14.Afzal AB, Akhtar MJ, Nadeem M, Ahmed M, Hassan MM, Yasin T, Mehmood M. Structural and electrical properties of polyaniline/silver nanocomposites. J Phys D Appl Phys. 2009;42:015411 (8 pp).Google Scholar
- 26.Svensson LG, Taylor DE, Forsgren CK, Backman PO. Microcalorimetry and impact testing applied to the study of explosive/polymer compatibility. In: Proceedings of ADPA symposium on compatibility of plastics and other materials with explos propell pyrot. Long Beach, California, USA; 1986, p. 86–91.Google Scholar