| Abstract: | Three poly(pyrazine-ether)s were prepared from 2,6-dichloropyrazine, silylated bisphenol-A and, in two cases, 4,4′-dichlorodiphenylsulfone. The alkylation of these poly(pyrazine-ether) with methyl triflate, dimethyl sulfate, methyl 4-nitrobenzenesulfonate, or γ-propanesultone was studied by 1H-NMR spectroscopy in nitrobenzene. Several N-methylated poly(pyrazine-ether)s were also isolated and characterized by elemental analyses, inherent viscosities, 1H-NMR spectra, 15N-NMR spectra, and DSC measurements. Furthermore, their solubilities in six different solvents were determined. Complete methylation raises the glass transition temperatures, reduces the solubility in aprotic solvents, and favors dissolution in methanol or ethanol. |
