ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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

E-mail: mkenmery@gmail.com

Received: 22 April 2023  Accepted: 29 July 2023

Abstract:

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 Cr₂O_3(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 Cr₂O_3(bulk) controlled the structure of poly(aniline) (PANI) and the same can be confirmed by FTIR spectroscopy. The T_g of Cr₂O₃ mediated PANI showed somewhat higher value than the pristine PANI. The XPS showed the presence of Cr3d2p_3/2 and Cr3d2p_1/2 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 www.springerlink.com.

DOI: 10.1007/s11696-023-03015-8

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