Chemistry Reference
In-Depth Information
FIGURE 2.6
The dependences of elasticity modulus
E
(1) and equilibrium modulus
E
∞
(2)
on macromolecular entanglements cluster network density n
cl
for PAr [47].
The value of polymers fluctuation free volume
f
g
can be calculated ac-
cording to the equation [52]:
1
+
n
,
(2.19)
f
=
0
012
g
1
-
2
n
where n is Poisson's ration, determined according to the results of mechani-
cal tests with the aid of the relationship [52]:
s
1
-
2
n
,
(2.20)
Y
E
=
(
)
6
1
+
n
where s
Y
is yield stress.
FIGURE 2.7
The dependence of relative fluctuation free volume
f
g
on relative fraction of
loosely packed matrix j
l.m.
for PC (1) and PAr (2) [47].
