TITLE

Fragility and dynamical properties of glass-forming liquids above their Tg

AUTHOR(S)
Cutroni, M.; Mandanici, A.; Pelster, R.; Spanoudaki, A.
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 513 Issue 1, p98
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A new broadband dielectric spectroscopy technique, operating from some Hz up to the microwave frequency region, has been used to study the collective dynamical aspects of some simple molecular liquids approaching their glass transition temperature. Accessing to the relaxational dynamics of metatoluidine (CH[sub 3]C[sub 6]H[sub 4]NH[sub 2]) on a mesoscopic timescale, a very high value of fragility has been obtained for this liquid in the classification scheme recently refined by Angell. © 2000 American Institute of Physics.
ACCESSION #
6028378

 

Related Articles

  • Normal mode analysis of liquid CS2: Velocity correlation functions and self-diffusion constants. Moore, P.; Keyes, T. // Journal of Chemical Physics;5/1/1994, Vol. 100 Issue 9, p6709 

    Normal mode analysis (NMA) is applied in a molecular-dynamics simulation of liquid CS2, modeled with a potential including internal degrees of freedom. The entire supercooled liquid range, from the glass transition at 100 K to melting at 165 K, and the normal liquid from 165 to 293 K, are...

  • Model for slow relaxation in supercooled liquids. Das, Shankar P. // Journal of Chemical Physics;11/15/1996, Vol. 105 Issue 19, p8822 

    We consider the mechanism for very slow relaxation in a supercooled liquid in the framework of the self-consistent mode coupling model. The short time dynamics in the model is taken into account through the inclusion of the bare transport coefficient while the cooperative dynamics over different...

  • Molecular dynamics at the glass transition: One dimensional and two dimensional nuclear magnetic resonance studies of a glass-forming discotic liquid crystal. Leisen, J.; Werth, M.; Boeffel, C.; Spiess, H. W. // Journal of Chemical Physics;9/1/1992, Vol. 97 Issue 5, p3749 

    The molecular dynamics of the aromatic core as well as the hydrocarbon side chains have been studied in a new kind of glass-forming discotic liquid crystal, based on a triphenylene core. It serves as a model compound in which only a limited number of degrees of freedom is activated at the glass...

  • Molecular dynamics of glass-forming liquids: Structure and dynamics of liquid metatoluidine. Chelli, Riccardo; Cardini, Gianni; Procacci, Piero; Righini, Roberto; Califano, Salvatore // Journal of Chemical Physics;4/8/2002, Vol. 116 Issue 14, p6205 

    A molecular dynamics simulation has been performed to investigate the structure and the dynamics of liquid and supercooled metatoluidine. H-bonding and clustering has been shown to dominate the structure of the liquid. An extensive analysis of the cluster formation and of its relation with the...

  • Fickian crossover and length scales from two point functions in supercooled liquids. Stariolo, Daniel A.; Fabricius, Gabriel // Journal of Chemical Physics;8/14/2006, Vol. 125 Issue 6, p064505 

    Particle motion of a Lennard-Jones supercooled liquid near the glass transition is studied by molecular dynamics simulations. We analyze the wave vector dependence of relaxation times in the incoherent self-scattering function and show that at least three different regimes can be identified and...

  • Molecular dynamics simulation of polymer liquid and glass. I. Glass transition. Rigby, David; Roe, Ryong-Joon // Journal of Chemical Physics;12/15/1987, Vol. 87 Issue 12, p7285 

    Molecular dynamics simulation of bulk liquid and glass of long-chain molecules has been performed. The system consists of linear chains of up to 50 spherical segments, each subject to forces due to bond stretching, bending, and torsion, and to nonbonded interaction, according to a truncated...

  • Relaxation dynamics in supercooled liquids studied by time-resolved spectroscopy. Kobayashi, Mika; Tsujimi, Yuhji; Yagi, Toshirou // AIP Conference Proceedings;2004, Vol. 708 Issue 1, p673 

    We have carried out impulsive stimulated thermal scattering (ISTS) on supercooled liquids to investigate q-dependence of relaxation dynamics in the liquid-glass transition. It is found that relaxation time Ï„R of density fluctuation and thermal relaxation time Ï„H become their maximum...

  • Dynamics of Glass Forming Liquids with Randomly Pinned Particles. Chakrabarty, Saurish; Karmakar, Smarajit; Dasgupta, Chandan // Scientific Reports;7/24/2015, p12577 

    It is frequently assumed that in the limit of vanishing cooling rate, the glass transition phenomenon becomes a thermodynamic transition at a temperature TK. However, with any finite cooling rate, the system falls out of equilibrium at temperatures near Tg(>TK), implying that the very existence...

  • Thermodynamic signature of growing amorphous order in glass-forming liquids. Biroli, G.; Bouchaud, J.-P.; Cavagna, A.; Grigera, T. S.; Verrocchio, P. // Nature Physics;Oct2008, Vol. 4 Issue 10, p771 

    Supercooled liquids exhibit a pronounced slowdown of their dynamics on cooling without showing any obvious structural or thermodynamic changes. Several theories relate this slowdown to increasing spatial correlations. However, no sign of this is seen in standard static correlation functions,...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics