A nuclear magnetic resonance study of poly (aryl ether ether ketone)

Clark, J. N. ; Jagannathan, N. R. ; Herring, F. G. (1988) A nuclear magnetic resonance study of poly (aryl ether ether ketone) Polymer, 29 (2). pp. 341-345. ISSN 0032-3861

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0032-3861(88)90344-8


Amorphous and crystalline samples of poly(aryl ether ether ketone) have been studied in the solid state by both 13C high-resolution cross-polarization/magic-angle spinning (CP/MAS) nuclear magnetic resonance (n.m.r.) and wide-line 1H n.m.r. The 13C 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 1H wide-line spectra were measured at temperatures from 295 to 440 K. The 1H 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.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Poly(aryl Ether Ether Ketone); Thermoplastic; Magic-angle Spinning; Proton Spin-lattice Relaxation; 13c Nuclear Magnetic Resonance; 1h Nuclear Magnetic Resonance
ID Code:74284
Deposited On:12 Dec 2011 04:03
Last Modified:12 Dec 2011 04:03

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