Author:
Drozd-Rzoska Aleksandra,Rzoska Sylwester J.,Starzonek Szymon
Abstract
AbstractWe show that on cooling towards glass transition configurational entropy exhibits more significant changes than predicted by classic relation. A universal formula according to Kauzmann temperature $${T}_{K}$$
T
K
is given: $$S={S}_{0}{t}^{n}$$
S
=
S
0
t
n
, where $$t=\left(T-{T}_{K}\right)/T$$
t
=
T
-
T
K
/
T
. The exponent $$n$$
n
is hypothetically linked to dominated local symmetry. Such a behaviour is coupled to previtreous evolution of heat capacity $$\Delta {C}_{P}^{config.}\left(T\right)=\left(nC/T\right){\left(1-{T}_{K}/T\right)}^{n-1}$$
Δ
C
P
c
o
n
f
i
g
.
T
=
n
C
/
T
1
-
T
K
/
T
n
-
1
associated with finite temperature singularity. These lead to generalised VFT relation, for which the basic equation is retrieved. For many glass-formers, basic VFT equation may have only an effective meaning. A universal-like reliability of the Stickel operator analysis for detecting dynamic crossover phenomenon is also questioned. Notably, distortions-sensitive and derivative-based analysis focused on previtreous changes of configurational entropy and heat capacity for glycerol, ethanol and liquid crystal is applied.
Publisher
Springer Science and Business Media LLC
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献