Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 59: Issue 1-2
The Thermal Degradation Mechanism and Thermal Mechanical Properties of Two High Performance Heterocyclic Polymer Fibers
Authors:
Z. Wu The University of Akron Maurice Morton Institute and Department of Polymer Science Akron Ohio 44325-3909 USA Akron Ohio 44325-3909 USA

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F. Li The University of Akron Maurice Morton Institute and Department of Polymer Science Akron Ohio 44325-3909 USA Akron Ohio 44325-3909 USA

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L. Huang The Chinese Academy of Science Polymer Physics Laboratory, Center for Molecular Science, Institute of Chemistry Beijing 100080 China Beijing 100080 China

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Y. Shi The Chinese Academy of Science Polymer Physics Laboratory, Center for Molecular Science, Institute of Chemistry Beijing 100080 China Beijing 100080 China

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X. Jin The Chinese Academy of Science Polymer Physics Laboratory, Center for Molecular Science, Institute of Chemistry Beijing 100080 China Beijing 100080 China

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S. Fang The University of Akron Maurice Morton Institute and Department of Polymer Science Akron Ohio 44325-3909 USA Akron Ohio 44325-3909 USA

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K. Chuang NASA Lewis Research Center Cleveland Ohio 44135-3191 USA Cleveland Ohio 44135-3191 USA

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R. Lyon Federal Aviation Administration Atlantic City International Airport Advanced Fire Resistant Materials, Fire Research Branch New Jersey 08405 USA New Jersey 08405 USA

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F. Harris The University of Akron Maurice Morton Institute and Department of Polymer Science Akron Ohio 44325-3909 USA Akron Ohio 44325-3909 USA

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S. Cheng The University of Akron Maurice Morton Institute and Department of Polymer Science Akron Ohio 44325-3909 USA Akron Ohio 44325-3909 USA

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Pages:
361–373
Online Publication Date:
02 Nov 2004
Publication Date:
25 Jan 2000
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010173004389
Keywords:
heterocyclic polymers; mechanical properties; thermal degradation
Restricted access

Abstract  

The thermal mechanical properties and degradation behaviors were studied on fibers prepared from two high-performance, heterocyclic polymers, poly(p-phenylenebenzobisthiazole) (PBZT) and poly(p-phenylenebenzobisoxazole) (PBZO). Our research demonstrated that these two fibers exhibited excellent mechanical properties and outstanding thermal and thermo-oxidative stability. Their long-term mechanical tensile performance at high temperatures was found to be critically associated with the stability of the C—O or C—S linkage at the heterocyclic rings on these polymers' backbones. PBZO fibers with the C—O linkages displayed substantially higher thermal stability compared to PBZT containing C—S linkages. High resolution pyrolysis-gas chromatography/mass spectrometry provided the information of the pyrolyzates' compositions and distributions as well as their relationships with the structures of PBZT and PBZO. Based on the analysis of the compositions and distributions of all pyrolyzates at different temperatures, it was found that the thermal degradation mechanisms for both of these heterocyclic polymers were identical. Kevlar®-49 fibers were also studied under the same experimental conditions in order to make a comparison of thermo-oxidative stability and long-term mechanical performance at high temperatures with PBZO and PBZT fibers. The data of two high-performance aromatic polyimide fibers were also included as references.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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