Abstract
Abstract Amorphous and crystalline samples of poly(aryl ether ether ketone) have been studied in the solid state by both 13 C high-resolution cross-polarization/magic-angle spinning (CP/MAS) nuclear magnetic resonance (n.m.r.) and wide-line 1 H n.m.r. The 13 C spectrum was assigned using the dipolar dephased and variable-contact-time experiments. The CP/MAS spectrum of the amorphous sample displays much broader signals than does the crystalline sample. The 1 H wide-line spectra were measured at temperatures from 295 to 440 K. The 1 H spectra appeared as two superimposed signals having different spin-lattice relaxation times. At all temperatures below the glass transition, the lines of the crystalline spectra were wider and showed longer spin-lattice relaxation times than those of the amorphous spectra.
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