Thermal Characteristics and Kinetic Parameters Assessment of Chitosan

Year 2018, Volume: 1 Issue: 2, 42 - 47, 20.12.2018

Sevgi Polat , Perviz Sayan

Abstract

In the present study,
thermal decomposition kinetics of chitosan was investigated by a thermal
analyzer. Firstly, the experiments were performed at three different heating
rates from 30 °C to 800°C
under inert atmosphere. The results showed that heating rates significantly
affected the maximum peak temperatures but it did not affect the conversion.
When the heating rates increased, the maximum peak temperatures shifted towards
the higher temperature region. In the second part, TG kinetic data was used to
calculate the activation energies based on Flynn-Wall-Ozawa (FWO),
Kissinger-Akahira-Sunose (KAS), Starink and Tang kinetic models. All models used
provided accurate fits of experimental data and yielded acceptable errors. The
values of the average activation energy for FWO, KAS, Starink and Tang models
were determined to be 148.5, 146.4, 148.3 and 146.7 kJ/mol, respectively.  

Keywords

chitosan, kinetic, thermal decomposition, activation energy

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