Kinetic study of the degradation of a new aromatic polyethersulfone

The degradation of a new thermoplastic polyethersulfone containing more than one SO2 group in the repeating unit was carried out in both dynamic and isothermal heating conditions, under N2 flow and in a static air atmosphere. The experiments indicated that the polymer degraded by initial random chai...

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Bibliographic Details
Published in:Polymer engineering and science 2000-05, Vol.40 (5), p.1114-1121
Main Authors: Abate, L., Pappalardo, A., Recca, A.
Format: Article
Language:English
Subjects:
Analysis
Applied sciences
Chemical reactions and properties
Degradation
Equipment and supplies
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Plastics industry
Polyethersulphones
Thermoplastics
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Summary:The degradation of a new thermoplastic polyethersulfone containing more than one SO2 group in the repeating unit was carried out in both dynamic and isothermal heating conditions, under N2 flow and in a static air atmosphere. The experiments indicated that the polymer degraded by initial random chain scission, followed by branching and crosslinking in an inert atmosphere and complete degradation in an oxidative environment. Apparent activation energy values associated with the first degradation stage were calculated and suggested that the first degradation stage was not affected by the experimental conditions. Results indicated for the investigated polymer a thermal stability higher than those of some previously investigated polyethersulfones containing only one SO2 group in their repeating units.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.11239