the changes in the structure has a positive impact on physical and mechanical
properties, increasing the hardness by 23 – 45, the yield strength at compression by 10
– 18, the proportionality limit by 23 – 40, the modulus of elasticity by 9 – 22, the
temperature of glass transition by 1.8 – 26.3 %, the wear resistance by 1.5 – 19.75 times
compared to the unfilled polyamide.
Table 7 Physical and mechanical properties of MPs, containing15 wt. %
of metallic filler
Properties
APP
Ni
Bronze
Cu
Ti
Al
Hardness, НВ, МPа
180
241
230
227
260
221
Yield strength, σ, МPа
228.8
259.5
261.7
267.0
269.0
251.3
Proportional limit, σ
p
МPа
152.6
212.8
200.8
210.0
203.0
187.5
Elasticity modulus, Е, МPа
2750
3310
3060
2990
3350
3310
The glass transition temperature, Т
g
, К
457
465
579
577
553
571
Wear intensity, I
h
, 10
-8
3.95
0.2
2.2
2.6
1.5
1.0
Analyzing the properties of filled systems and comparing them with the structure,
it can be noted that the formation of multimolecular globules in the boundary layer
with the filler has the lowest impact on the increase in hardness and yield strength in
compression, while crown-shaped structures of globular slats have the biggest impact.
The formation of individual folded structures leads to a significant improvement in
proportional limit at compression, as well as the system’s wear resistance. The
formation of globular slat has a significant effect on increasing the glass transition
temperature, but the wear resistance and elastic modulus systems vary insignificantly.
Thus, it has been found that metal fillers have a strong effect on the polymer
matrix, causing the thermochemical changes associated with the active action of fillers
on metal-containing polymers structuring processes. Electron microscopy shows the
emergence of new structures at the interface “polymer – filler” and in boundary layers,
which have a strong influence on the properties of filled systems. The obtained data
testifies to the fact that introducing various metal fillers can be used for aimed
adjustment of the polymers’ properties.
CONCLUSION
The chapter is devoted to the development of new thermo-resistant metal-
containing polymers based on aromatic polyamide phenylone for friction units instead
of highly deficient metals and known antifriction materials.
It has been established that physical and chemical interactions between metal
particles and phenylone significantly affect the processes of structuring of the
developed metal-containing polymers. Physical interaction is manifested in an increase
in the average size of crystallites with a simultaneous decrease in the shortest
interatomic distance, which has been revealed by quantitative X-ray analysis. The
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