

High thermal stability of aliphatic polyurethanes prepared from sesame and peanut oil and their kinetic parameters
Venkatesh Desappan (1)


(1) Department of Chemistry, Presidency College (Autonomous), Chennai-600005, India
(2) Department of Chemistry, Presidency College (Autonomous), Chennai-600005, India
(*) Corresponding Author
Received: 28 Mar 2018 | Revised: 02 May 2018 | Accepted: 05 May 2018 | Published: 30 Jun 2018 | Issue Date: June 2018
Abstract
Thermo-responsive vegetable oil-based polyurethanes were successfully prepared by poly-condensation reaction in the mixture of polyol and hexamethylene diisocynate. The functionality and high molecular weight of the polyurethanes were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Proton Nuclear Magnetic Resonance Spectroscopy (1H NMR), Carbon Nuclear Resonance Spectroscopy (13C NMR), and Gel Permeation Chromatography. The viscosity of the polyols was characterized by Rheometry and flow rate of the polyols were derived from power law model. The kinetic and thermodynamic parameters of synthesized polyurethanes HSCP and HPCP were calculated from by TG curve. Five different mass loss temperature was obtained in the TGA curve of HSCP and HPCP, which corresponded to the decomposition of the physically observed NH and C=O formed between polyol and diisocyanate, respectively. The average value of the activation energy calculated by Murray and White, Coats and Redfern, Doyle’s, and Freeman-Carroll’s method. The success of the investigated different vegetable oil-based polyurethanes, in comparison with the activation energy of the Freeman-Carroll’s method to determine the thermal stability and the lifetime prediction of the peanut and sesame oil-based polyurethanes is 1.87×105 and 1.27×104 s-1.
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DOI: 10.5155/eurjchem.9.2.126-137.1703
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Citations
[1]. Venkatesh Desappan, Jaisankar Viswanathan
Synthesis and Characterization of Biodegradable Jatropha Oil Based Polyurethanes Using Modified Sesame Oil as Cross-Linker Containing Different NCO Groups with Improved Thermal Stability
Asian Journal of Chemistry 31(10), 2375, 2019
DOI: 10.14233/ajchem.2019.22014

[2]. Mohammad Suhail, Sofi Danish Mukhtar, Imran Ali, Ariba Ansari, Saiyam Arora
Theoretical DFT study of Cannizzaro reaction mechanism: A mini perspective
European Journal of Chemistry 11(2), 139, 2020
DOI: 10.5155/eurjchem.11.2.139-144.1975

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