NDLI: Thermal dehydration and degradation kinetics of heptylidene chitosan

Content Provider	Springer Nature Link
Author	Muraleedharan, K. Alikutty, P. Abdul Mujeeb, V. M.
Copyright Year	2015
Abstract	The thermal dehydration and degradation of chitosan and heptylidene chitosan were studied by differential scanning calorimetry at four different heating rates: 5, 10, 15 and 20 K min−1. The activation energy values of thermal dehydration and degradation of chitosan and heptylidene chitosan were investigated using different isoconversional and maximum rate (peak) methods viz. Kissinger–Akahira–Sunose (KAS), Tang, Starink, Flynn–Wall–Ozawa (FWO) and Bosewell. The variations of activation energy, E α, with conversion function, α, established using these different methods were found to be similar. Compared to the FWO method, the KAS method offers a significant improvement in the accuracy of the E a values. All the maximum rate (peak) methods yielded consistent values of E α for the dehydration and degradation reactions of both chitosan and HEPT-chitosan. From the results, it can be concluded that one can follow the maximum rate (peak) methods to get the value of E α ; however, the complexity of the reaction can be identified only through isoconversional methods.
Starting Page	809
Ending Page	819
Page Count	11
File Format	PDF
ISSN	01700839
Journal	Polymer Bulletin
Volume Number	72
Issue Number	4
e-ISSN	14362449
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-01-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Heptylidene chitosan Dehydration and degradation kinetics Isoconversional methods Maximum rate methods Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Condensed Matter Physics Polymers and Plastics

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