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Synthesis, characterization and non-isothermal degradation kinetics of rose Bengal end capped poly(aniline)/Cr2O3 nanocomposite

M. Kenet Nancy Mary, A. Jancirani, R. Baskaran, and R. Anbarasan

Department of Plastics Technology, Tamilnadu Government Polytechnic College, Madurai, India



Received: 22 April 2023  Accepted: 29 July 2023


Solution polymerization of Ani was carried out in the presence of peroxydisulfate as a free radical initiator under N2 atmosphere at 0–5 °C for 2 h both in the presence and absence of Cr2O3(bulk) material under vigorous stirring condition. During the polymerization reaction, the Rose Bengal dye was added as an end capping agent. The above synthesized polymers were characterized by FTIR, UV–visible, fluorescence emission, XPS, XRD, DSC, TGA, SEM, HR-TEM, viscosity and conductivity measurements. The added Cr2O3(bulk) controlled the structure of poly(aniline) (PANI) and the same can be confirmed by FTIR spectroscopy. The Tg of Cr2O3 mediated PANI showed somewhat higher value than the pristine PANI. The XPS showed the presence of Cr3d2p3/2 and Cr3d2p1/2 peaks and this confirmed the nano-sized crystalline Cr2O3. Further, its thermal degradation was studied by non-isothermal degradation kinetics and their thermodynamic parameters were determined. The experimental data were compared with the available literature data.

Graphical abstract

Keywords: Synthesis of PANI/Cr2O3; Characterization of nanocomposites; HR-TEM; XPS; Non-isothermal degradation kinetics; Thermodynamic parameters

Full paper is available at

DOI: 10.1007/s11696-023-03015-8


Chemical Papers 77 (12) 7431–7445 (2023)

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