polymer analogous to Nomex by DuPont, which was chosen as a binder for the
manufacture of MPs.
APP is a promising thermally stable polymer for structural purposes, which can
be used for a long time to a temperature of 533 K, which is not inferior in strength to
the best brands of reinforced plastics [4]. However, the phenylone recycling in products
causes certain difficulties, for example, low deformability and fluidity of phenylone in
the softening temperature range narrow the temperature range of its processing and
require the application of high pressures, resulting in product size limitations.
Modification of phenylone with various kinds of fillers is also accompanied by
difficulties associated with insufficient adhesive strength between the polymer matrix
and the filler. As a consequence, strength parameters and heat resistance of composites
are reduced, and, the more, the higher their content. Therefore, the development of MPs
based on heat-resistant APP with an increased adhesion strength between phenylone
and filler is an urgent task in the development of composites with increased physical
and mechanical properties.
Fine powders of carbonyl nickel (PNK-2K10 according to GOST State Standard
9722–97), copper (PMS–1 according to GOST State Standard 4960–2009), aluminum
(PA–1 according to GOST State Standard 6058–73), titanium (PTK–1(2) according to
TU 14–22–57–92 standard), and bronze (Bronze O5Ts5S5 according to GOST State
Standard 613–79) were used as filling materials. The basic properties of the materials
are presented in Table 1.
Table 1 Basic properties of compacted powders
Symbol
Color
Density,
kg/m
3
Apparent density,
kg/m
3
Melting
point, K
Particle size,
μm
APP
Pink
1350
200—300
543*
35—50
Ni
Gray
8900
1200 or more
1726
12—21
Cu
Red
8960
1250—2000
1356
33—57
Al
Silver-white
2699
960
934
129—172
Ti
Silver-white
4505
2850
1933
158—284
Bronze
Goldish
8800
3700—4700
1203—1373
43—90
* Vicat softening point
The following compacted powder compositions were used: APP + 5–20 wt. % of
a fine metallic FM were prepared by the original technique in a vortex mixer. The
resulting mixtures were pelleted on a hydraulic press at room temperature; then, the
pelleted samples were dried in an oven at a temperature of 473–523 K since the
processing of undried phenylone impairs its strength properties and results in surface
flaws [5]. The dried and pelleted workpieces were subjected to compression molding
to manufacture products.
The effect of various metallic filling materials on the structure of aromatic-
polyamide-based composite materials. Research in the field of structural mechanics
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