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Sulfonated PEEK fiber reinforced composites for increased thermal and mechanical properties
Gurung, Dinesh Murad, Md. Shafinur Ravi, Nivedhan Bakir, Mete Bahçeci, Ersin Er, O. Safaker, B. Gursoy, M. Cenk Andrade, Emanuel Asmatulu, Eylem
Gurung, Dinesh
Murad, Md. Shafinur
Ravi, Nivedhan
Bakir, Mete
Bahçeci, Ersin
Er, O.
Safaker, B.
Gursoy, M. Cenk
Andrade, Emanuel
Asmatulu, Eylem
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Conference paper
Adobe PDF, 842.6 KB
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Original Date
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Issue Date
2023-03
Type
Conference paper
Genre
Keywords
Sulfonation,PEEK,Fiber composites,Fire resistance,Improved properties
Subjects (LCSH)
Citation
Gurung, D., Murad, M.S., Ravi, N., Bakir, M., Bahceci, E., Er, O., Safaker, B., Gursoy M., Andrade, E., Asmatulu, E., & Asmatulu, R. (2023). Sulfonated PEEK fiber reinforced composites for increased thermal and mechanical properties. Proceedings of the 2023 IEMS Conference, 29, 93-101. https://doi.org/10.62704/10057/26124
Abstract
Polyetheretherketone (PEEK) is a special set of thermoplastic polymers that possess fascinating mechanical, chemical, and electrical properties for various industries, such as aircraft, biomedical, automotive, satellite, energy, and defense. Recently, sulfonated PEEK (SPEEK)-based fiber-reinforced composites have been designed and fabricated for the same purposes. However, manufacturing PEEK fiber composites is considerably difficult because of the inertness and high melting point of PEEK; thus, the sulfonation process is a necessary step to make the PEEK composites in many cases. About 5 wt% PEEK powder was initially dried for 24 hours at 100°C and then sulfonated in a 98% sulfuric acid solution for 12 hours at 65°C while continuously stirring in a closed glass beaker. The precipitation was performed afterward using the water bath technique by pouring the PEEK/acid solution into the cold water to make the SPEEK polymer particles. After washing several times in DI water (until neutralizing the pH to 6-7) and drying in an oven at 100°C for a minimum of 24 hours, the SPEEK polymer is obtained. The dry SPEEK polymers were dissolved in dimethylformamide (DMF) with a ratio of 1/2 and mixed well with Kevlar and Glass fibers in different layers by the wet layup process to produce SPEEK fiber composites under vacuum bagging at a higher temperature (200°C) till all the solvent was removed. The UL 94 standard vertical flame test results showed that the SPEEK composites had very high flame-resistant properties. The water contact angle studies indicated that the composites were highly hydrophobic. The maximum tensile strengths of glass and Kevlar fiber composites were found to be 234,99 and 376.8 MPa and flexural strengths of 51.14 and 92.95 MPa, respectively. SEM testing helped analyze the resin interaction's topology on the composite samples. The smoke density test confirmed that light visibility decreased with increased burning time.
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Description
Published in SOAR: Shocker Open Access Repository by Wichita State University Libraries Technical Services, January 2024.
Publisher
Association for Industry, Engineering, and Management Systems
Journal
Book Title
Series
Proceedings of the 2023 IEMS Conference
v.29
v.29
Digital Collection
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Use and Reproduction
Archival Collection
PubMed ID
ISSN
2690-3210 (print)
2690-3229 (online)
2690-3229 (online)