Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2010-06-01

Journal: 19th Annual Workshop and Exhibition of the Canadian-Thermal-Analysis-Society

Included Journals: CPCI-S、EI、SCIE

Volume: 100

Issue: 3

Page Number: 1055-1062

ISSN: 1388-6150

Key Words: Poly(aryl ether); Thermal degradation; Kinetics; Life estimation

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.