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od 2020-09-20

Title: Molecular dynamics in supercooled di-isobutyl phthalate close to the glass transition

Source: Journal of Physics - Condensed Matter

Year : 2000

Abstract:

The dynamics of the alpha -relaxation in a glass-forming low-molecular-weight system, diisobutyl phthalate (DIBP), has been studied by means of dielectric, nuclear magnetic and mechanical spectroscopies. By using these techniques we have covered a wide timescale ranging from 10(-11) to 10(2) s. Vogel-Fulcher con elation time behaviour and the Davidson-Cole distribution function make possible a simultaneous fitting of T-1, the nuclear Overhauser enhancement (NOE) factor and dielectric data over the temperature range (Tg - 4 K) < T < (Tg + 155 K). These results together with the viscosity data have been analysed in terms of the Debye diffusion.

DOI: 10.1088/0953-8984/12/46/303   (Pobrane:  aktualizowanie)