The influence of the secondary relaxation processes on the structural relaxation in glass-forming materials

2013 ◽  
Vol 138 (24) ◽  
pp. 244502 ◽  
Author(s):  
A. A. Khamzin ◽  
I. I. Popov ◽  
R. R. Nigmatullin
Keyword(s):  
Structural Relaxation ◽  
Relaxation Processes ◽  
Secondary Relaxation ◽  
Glass Forming ◽  
Glass Forming Materials

Relationship between particle elasticity, glass fragility, and structural relaxation in dense microgel suspensions

Soft Matter ◽  
2015 ◽  
Vol 11 (27) ◽  
pp. 5485-5491 ◽  
Author(s):  
Raymond P. Seekell, III ◽  
Prasad S. Sarangapani ◽  
Zexin Zhang ◽  
Yingxi Zhu
Keyword(s):  
Structural Relaxation ◽  
Strong Dependence ◽  
Relaxation Processes ◽  
Full Spectrum ◽  
Glass Forming ◽  
Colloidal Liquids ◽  
Fragile Glass

A full spectrum of strong to fragile glass-forming behaviors can be achieved in a single microgel system of increased particle elasticity. The glass fragility and structural relaxation processes of glass-forming dense colloidal liquids show strong dependence on particle elasticity.

The Dynamics of Interacting Systems: Glassy Ionic Conductors and Glass-Forming Materials

1995 ◽  
Vol 411 ◽  
Author(s):  
K. L. Ngai ◽  
A. K. Rizos
Keyword(s):  
Correlation Function ◽  
Structural Relaxation ◽  
Time Range ◽  
Relaxation Techniques ◽  
Ionic Conductors ◽  
Time Dynamics ◽  
Glass Forming ◽  
Interacting Systems ◽  
Glass Forming Materials ◽  
Short Time

ABSTRACTThe dynamics of densely packed interacting systems including glass-forming materials and glassy ionic conductors of various chemical and micro structures have been investigated experimentally by many workers, covering an immense time range from microscopic times shorter than 10−12 s to macroscopic times as long as 104 s. The short time dynamics is fundamental because it can directly reveal the microscopic mechanism of the relaxation. Several experimental investigations of structural relaxation in glass-forming substances have found that the short time dynamics shows exponential relaxation with a correlation function well described by exp(−t/τo) for t<tc where tc is temperature insensitive and has the order of magnitude of a picosecond. The correlation function then crosses over at tc to assumes the stretched exponential form, exp[−(t/τ)β], for t>tc. The relaxation times τ and τo are related by the expression τ = [tc−(1−β)τo]1/β. In this work, we focus on glassy ionic conductors and ionic glass-forming materials and experiments that employ dielectric spectroscopic and conductivity relaxation techniques, the theme of this Symposium. We show that these experimental data exhibit the same feature as described above for structural relaxation and are in accord with the predictions of the coupling model proposed by one of the authors.

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