The heat resistance of heterogeneous systems with numerous interfaces can
change significantly. Inhibition or acceleration of the various stages of destruction
process is observed depending on the nature of the surface of filler and its
concentration. In connection with it, the research of thermal behavior of filled systems
becomes topical.
The results of thermogravimetric analysis (Table 4, Fig. 6) indicate a high heat
resistance of both initial phenylone and metal-containing polymers on its base. The
contours of all curves “mass loss – temperature” are analogical, i.e. the decomposition
of metal-filled phenylone proceeds like a pure polymer. Qualitative changes in mass
loss are almost absent in the range of working temperatures, however, the thermal
behaviour of polyamide matrix changes noticeably with the increasing temperature of
the filler.
Table 4 Heat resistance of metal-containing polymers based on phenylone, K
Material
Т
bt.
Т
5
Т
10
Т
20
Т
v
max
Т
exp.
APP
568
689
714
737
702.6
743.3
Al
570
687
716
740
700.1
742.3
Cu
523
678
705
727
695.1
733.6
Ti
566
683
714
737
697.2
741.6
Ni
571
691
715
740
697.1
740.1
Bronze
521
674
699
718
690.2
719.4
At the first stage, there is a gradual mass decreasing (2 – 4 %) for all the test
materials at the temperature range 373 – 423 K due to the removing of moisture. Then,
up to T = 623 K, mass of the samples remains practically unchanged, at the same time
there is a smooth course of the differential thermogravimetric analysis (DTA) curves
without pronounced changes.
Figure 6. Curves of TGA (1) and DTA (2) of phenylone
The intensive destruction of both initial phenylone and metal-containing polymers
on its base, accompanied by significant loss of mass, starts after 678 – 691 K. Narrow
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