Halogenated polyaryletherketones with enhanced thermal stability

Li, Long; Liu, Siyuan; Liu, Zhuang; Jing, Liwei; Guan, Shaokang; Jiang, Zhenhua; Liu, Baijun; Matsumoto, Toshihiko

doi:10.1177/0954008312442425

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Relatively speaking, more monomers can be obtained easily by introducing substituents into aromatic rings such as methyl, trifluoromethyl, butyl, halogen, phenyl, and other groups, more functional PEKs can be developed, and the performance of PEKs can be improved accordingly. 19 –31 Although many PEKs with pendant groups are well documented, there are no studies covering PEKs containing triphenylphosphine pendant groups. In addition, it was found that insertion of rigid pyridine ring into PEK macromolecular chains could improve their thermal stability, chemical stability, and solubility.…”

Section: Introductionmentioning

confidence: 99%

New poly(aryl ether ketone)s containing 2,6-diphenylpyridyl units and diphenylphosphinophenyl pendant groups

Zhang

Sheng

Zhang

et al. 2020

High Performance Polymers

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4-(4-Diphenylphosphino)phenyl-2,6-bis(4-hydroxyphenyl)pyridine, as a new bisphenol monomer, was prepared from 4-(diphenylphosphino)benzaldehyde and 4-hydroxyacetophenone and used in the preparation of several aromatic poly(ether ketone)s (PEKs) containing 2,6-diphenylpyridyl units and diphenylphosphinophenyl pendant groups via a nucleophilic aromatic substitution polycondensation with difluorinated aromatic ketones. The polycondensation proceeded quantitatively in tetramethylene sulfone in the presence of anhydrous potassium carbonate and afforded the polymers with high molecular weights. The resulting PEKs are amorphous and exhibit high glass transition temperatures of 209–255°C and 5% weight loss temperatures of 536–554°C with char yields of 57–62% at 800°C in nitrogen. Their high char yields and good limited oxygen index values ranging from 39 to 43 indicated these polymers exhibited good thermal stability and flame-retardant property. All new PEKs were soluble in common organic solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide, and chloroform and could form tough, flexible, and strong films with tensile strengths of 74.6–86.8 MPa, tensile moduli of 2.9–3.6 GPa, and elongations at break of 5–9%.

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