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Kinetic Study on the Pyrolysis of Amylose and its Derivatives
Author(s) -
Desai D. H.,
Patel C. K.,
Patel K. C.,
Patel R. D.
Publication year - 1972
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19720240304
Subject(s) - thermogravimetric analysis , chatterjee , amylose , chemistry , pyrolysis , activation energy , thermal decomposition , polymer , thermal stability , yield (engineering) , kinetics , decomposition , polymer chemistry , nuclear chemistry , organic chemistry , materials science , starch , metallurgy , philosophy , linguistics , bengali , physics , quantum mechanics
The kinetics of pyrolysis of amylose, amylose acetate and amylose propionate has been studied using thermogravimetric (TGA) and differential thermal analysis (DTA) in nitrogen atmosphere. Chatterjee, Anderson and Freeman, and Reich methods of analysis have been applied to the TGA and DTA data of these polymers. The Chatterjee method adequately explains the initial stage of pyrolysis of the polymers, while Anderson and Freeman, and Reich methods yield high activation energy in contrast to the experimental evidence. Thermal analysis showed that the thermal stability of amylose increases when it is substituted. Amylose has been found to decompose before melting, while the esters melt before decomposition. The melting temperature of the esters decreased with increased size of the pendent groups.