Chemistry Reference
In-Depth Information
In this theme completion an interesting structural aspect of intercom-
ponent adhesion in natural nanocomposites (polymers) should be noted.
Despite the considered above different mechanisms of reinforcement and
nanoclusters-loosely packed matrix interaction realization the common
dependence
b
m
(j
cl
) is obtained for the entire studied temperature range of
293÷413K, which is shown in Fig. 15.17. This dependence is linear, that
allows to determine the limiting values
b
m
≈ 970 at j
cl
= 1.0 and
b
m
= 0 at
transition is realized at j
cl
≈ 0.26 [43].
Hence, the stated above results have demonstrated, that intercomponent
adhesion level in natural nanocomposites (polymers) has structural origin
and is defined by nanoclusters relative fraction. In two temperature ranges
two different reinforcement mechanisms are realized, which are due to large
friction between nanoclusters and loosely packed matrix and also perfect (by
Kerner) adhesion between them. These mechanisms can be described suc-
cessfully within the frameworks of fractal analysis.
FIGURE 15.17
The dependence of parameter
b
m
on nanoclusters relative fraction φ
cl
for
PC [43].
The further study of intercomponent adhesion in natural nanocompos-
shown, from which
b
m
reduction or intercomponent adhesion level enhance-
ment at testing temperature growth follows. In the same figure the maximum
