Kinetics of thermal degradation of poly(aryl ether)s containing phthalazinone and life estimation |
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| Authors: | W. He F. Deng G.-X. Liao W. Lin Y.-Y. Jiang X.-G. Jian |
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| Affiliation: | 1. Key Laboratory of Applied Technology of Polymer Materials, The Education Department of Liaoning Province, Shenyang Institute of Chemical Technology, Shenyang, 110142, People’s Republic of China
2. Department of Polymer Science & Materials, Dalian University of Technology, Dalian, 116012, People’s Republic of China
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| Abstract: | New special engineering thermoplastics, poly(phthalazinone ether sulfone) (PPES) and poly(phthalazinone ether sulfone ketone) (PPESK), containing phthalazinone are synthesized through step-polymerization. The kinetics of thermal degradation of PPES and PPESK (1/1) in nitrogen is investigated at several heating rates by thermogravimetry (TG). It is concluded that, based on using Satava’s theory, the thermal degradation mechanism of PPESK (1/1) is nucleation and growth, the order of reaction of the degradation process is one (n = 1). In contrast, the thermal degradation mechanism of PPES is a phase boundary controlled reaction and the order of the reaction is two (n = 2). The kinetic parameters, including reaction energy and frequency factor of thermal degradation reaction for PPES and PPESK (1/1) are analyzed using isoconversional Friedman, Kissinger–Akahira–Sunose (K–A–S) and Ozawa method. In addition, the study focus on the influence of heating rate and ratio of ketone/sulfone on thermal stability and the life estimation are described. |
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