Thermal Properties of Poly(arylene ether)s Prepared from N,N-Dialkyl-2,4-Difluorobenzenesulfonamides
Publication Date
2016
Document Type
Thesis
Committee Members
Eric Fossum, Ph.D. (Advisor); Daniel Ketcha, Ph.D. (Committee Member); William Feld, Ph.D. (Committee Member)
Degree Name
Master of Science (MS)
Abstract
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 ⁰C to 405 ⁰C. 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 ⁰C to 179 ⁰C.
Page Count
76
Department or Program
Department of Chemistry
Year Degree Awarded
2016
Copyright
Copyright 2016, all rights reserved. My ETD will be available under the "Fair Use" terms of copyright law.
