Chemistry Reference
In-Depth Information
It is easy to see, that ∆
i
decrease corresponds to bifurcation point critical
temperature increase.
TABLE 15.1
The Critical Parameters of Nanocluster Structure State For PC [8]
The temperature range
c
φ′
*
c
φ
A
m
D
i
m
m
*
0.528
0.330
0.623
0.618
1
1
213÷333 K
0.330
0.153
0.465
0.465
1
2
333÷390 K
0.153
0.049
0.324
0.324
1
8
390÷425 K
Therefore, critical temperatures
T
cr
(
T
0
,
T
g
' and
T
g
) values increase should
corresponding values for polyarylate (PAr) are also plotted. This correlation
proved to be linear one and has two characteristic points. At ∆
i
= 1 the lin-
ear dependence
T
cr
(
D
) extrapolates to
T
cr
= 293K, that is, this means, that
at the indicated ∆
i
value glassy polymer turns into rubber-like state at the
used testing temperature
T
= 293K. From the data of the determined by gold
proportion law ∆
i
= 0.213 at
m
= 1 follows [12]. In the plot of Fig. 15.2 the
greatest for polymers critical temperature
T
cr
=
T
ll
. (T
ll
is the temperature of
“liquid 1 to liquid 2” transition), defining the transition to “structureless liq-
uid” [13], corresponds to this minimum magnitude. For polymers this means
the absence of even dynamical short-lived local order [13].
Hence, the stated above results allow to give the following interpretation
of critical temperatures
T
′
and
T
g
of amorphous glassy polymers structure
within the frameworks of solid body synergetics. These temperatures cor-
respond to governing parameter (nanocluster contents) φ
cl
critical values,
at which reaching one of the main principles of synergetics is realized-sub-
ordination principle, when a variables set is controlled by one (or several)
variable, which is an order parameter. Let us also note reformations number
m
= 1 corresponds to structure formation mechanism particle-cluster [4, 5].
1
i
