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JAMES KANYOKO WAWERU. THESIS.pdf (1.73 MB)

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Thermal Properties of Poly(arylene ether)s Prepared from N,N-Dialkyl-2,4-Difluorobenzenesulfonamides

Waweru, James Kanyoko
http://rave.ohiolink.edu/etdc/view?acc_num=wright1471687027

Abstract Details

2016, Master of Science (MS), Wright State University, Chemistry.
A series of poly(arylene ether)s were synthesized by nucleophilic aromatic substitution reaction (NAS) polycondensation of N,N-dialkyl-2,4-difluorobenzenesulfonamides. The aim of the project was to determine the thermal properties of poly(arylene ether)s by varying pendent sulfonamide activating group. The sulfonamide-activated monomers were synthesized by reacting 2,4-difluorobenzenesulfonyl chloride with a series of n-alkyl, iso-alkyl and cycloalkyl amines, ranging from n-propyl to n-octyl. Their poly(arylene ether)s were prepared with bisphenol-A as the nucleophilic reaction partner. The 4’-bromo-2,4-difluorodiphenylsulfone monomer, was utilized to synthesized copolymer with 4,4’-difluorodiphenylsulfone and bisphenol-A. The polymers were characterized by 1H and 13C NMR spectroscopy, TGA, DSC and SEC. Sulfonamide based polymers, exhibited moderate thermal stability with 5% weight loss temperature ranging from 372 oC to 405 oC. The influence of the alkyl group on glass transition temperature was examined, it was found that as the length of alkyl group length increases glass transition temperature decreased, which ranged from 34 oC to 179 oC.
Eric Fossum, Ph.D. (Advisor)
Daniel Ketcha, Ph.D. (Committee Member)
William Feld, Ph.D. (Committee Member)
76 p.
Chemistry; Polymers
poly arylene ethers; PAE; functionalized; sulfonamide; sulfone; pendent; glass transition temperature; ortho and para activated

Recommended Citations

Citations

  • Waweru, J. K. (2016). Thermal Properties of Poly(arylene ether)s Prepared from N,N-Dialkyl-2,4-Difluorobenzenesulfonamides [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1471687027

    APA Style (7th edition)

  • Waweru, James. Thermal Properties of Poly(arylene ether)s Prepared from N,N-Dialkyl-2,4-Difluorobenzenesulfonamides . 2016. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1471687027.

    MLA Style (8th edition)

  • Waweru, James. "Thermal Properties of Poly(arylene ether)s Prepared from N,N-Dialkyl-2,4-Difluorobenzenesulfonamides ." Master's thesis, Wright State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1471687027

    Chicago Manual of Style (17th edition)

wright1471687027
479
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This open access ETD is published by Wright State University and OhioLINK.