Application of an extended Tool–Narayanaswamy–Moynihan model.Part 2. Frequency and cooling rate dependence of glass transition from temperature modulated DSC

Polymer ◽  
2005 ◽  
Vol 46 (26) ◽  
pp. 12240-12246 ◽  
Author(s):  
Stefan Weyer ◽  
Heiko Huth ◽  
Christoph Schick
Keyword(s):  
Glass Transition ◽  
Cooling Rate ◽  
Rate Dependence ◽  
Modulated Dsc ◽  
Temperature Modulated Dsc

scholarly journals Cooling rate dependence of the glass transition at free surfaces

2008 ◽  
Vol 77 (4) ◽  
Author(s):  
S. Streit-Nierobisch ◽  
C. Gutt ◽  
M. Paulus ◽  
M. Tolan
Keyword(s):  
Glass Transition ◽  
Cooling Rate ◽  
Rate Dependence ◽  
Free Surfaces

scholarly journals COOLING RATE DEPENDENCE AND DYNAMIC HETEROGENEITY BELOW THE GLASS TRANSITION IN A LENNARD–JONES GLASS

1999 ◽  
Vol 10 (08) ◽  
pp. 1443-1451 ◽  
Author(s):  
K. VOLLMAYR-LEE ◽  
W. KOB ◽  
K. BINDER ◽  
A. ZIPPELIUS
Keyword(s):  
Molecular Dynamics ◽  
Glass Transition ◽  
Cooling Rate ◽  
Melting Process ◽  
Rate Dependence ◽  
Local Order ◽  
Average Particle ◽  
Dynamic Heterogeneity ◽  
Lennard Jones ◽  
Dynamics Simulations

We investigate a binary Lennard–Jones mixture with molecular dynamics simulations. We consider first a system cooled linearly in time with the cooling rate γ. By varying γ over almost four decades we study the influence of the cooling rate on the glass transition and on the resulting glass. We find for all investigated quantities a cooling rate dependence; with decreasing cooling rate the system falls out of equilibrium at decreasing temperatures, reaches lower enthalpies and obtains increasing local order. Next we study the dynamics of the melting process by investigating the most immobile and most mobile particles in the glass. We find that their spatial distribution is heterogeneous and that the immobile/mobile particles are surrounded by denser/less dense cages than an average particle.

Sign in / Sign up

Export Citation Format

Share Document