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od 2020-09-20

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

Source: Solid State Nuclear Magnetic Resonance

Year : 1997

Abstract:

Spin-lattice relaxation times T-1 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 T-1 and T-1p, as well as H-1 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.
(C) 1997 Elsevier Science B.V.

DOI: 10.1016/S0926-2040(96)01292-1   (Pobrane:  2020-10-21)