Kinetics of the isothermal degradation of model polymers containing ether, ketone and sulfone groups

The kinetics of isothermal degradation of four model polymers containing ether, ketone and sulfone groups in the polymer chain was studied in order to investigate the influence of various groups on the apparent activation energy values ( E a) of degradation. Isothermal experiments were carried out i...

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Bibliographic Details
Published in:Polymer degradation and stability 2005-02, Vol.87 (2), p.271-278
Main Authors: Abate, Lorenzo, Blanco, Ignazio, Orestano, Alice, Pollicino, Antonino, Recca, Antonino
Format: Article
Language:English
Subjects:
Applied sciences
Chemical reactions and properties
Degradation
Exact sciences and technology
Kinetics of degradation
Organic polymers
Physicochemistry of polymers
Polyetherketones
Polyethersulfones
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Summary:The kinetics of isothermal degradation of four model polymers containing ether, ketone and sulfone groups in the polymer chain was studied in order to investigate the influence of various groups on the apparent activation energy values ( E a) of degradation. Isothermal experiments were carried out in both flowing nitrogen and static air. Degradation E a values were determined by both a literature method and a new method we set up recently and were compared with each other and with those previously obtained by us in the scanning mode. The results are discussed and a kinetic stability classification among various groups (sulfone > ketone > ether) is obtained, which is interpreted on the basis of the percentage of double-bond character of chain bonds. The picture of results confirmed the reliability of our method for determining E a values of isothermal degradation directly from experimental weight loss data.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2004.06.011