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Dynamics of glass-forming di-n-butyl phthalate as studied by NMR

✍ Scribed by E. Szcześniak; S. Głowinkowski; W. Suchański; S. Jurga

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
573 KB
Volume
8
Category
Article
ISSN
0926-2040

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✦ Synopsis

Spin-lattice relaxation times T1 and nuclear Overhauser effect (NOE) enhancement factors for the individual ring carbons in di-n-butyl phthalate (DBF) show that the reorientational correlation function corresponding to the global dynamics in supercooled liquid can be described by a Davidson-Cole distribution. Measurements of proton spin-lattice relaxation times T1 and T1p, as well as 1H NMR spectra at temperatures below the glass transition temperature, Tg, reveal that the same distribution holds also for description of local dynamics in glassy DBF. The activation parameters of the motions detected are derived.

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