Chemistry Reference
In-Depth Information
fiber (X925) and carbon fiber (X935), which are characterized by the good
physical-mechanical properties (Table 7.4). The unreinforced polymer has
the density almost constant till glassing temperature (about 160 °C). The
reinforcing with fibers permits further to increase the heat resistance of
polyesterester ketone. At the moment the polyesteresterketones labeled
“Hostatec” are being produced with 10, 20 and 30 weight % of glass
and carbon fibers. Several labels of polyesteresterketones are under de-
velopment which involve mineral fillers, are not reinforced and contain
30 weight % of glass and carbon fibers.
The constructional thermoplast “Hostatec” dominates polyoxymeth-
ylene, polyamide and complex polyesters on many parameters.
The polyesteresterketones can be easily processed by pressing, die cast
and extrusion. They can be repeatedly crushed to powder for secondary
utilization. They are mainly used as constructional materials but also can
be used as electroinsulation covers operating at temperatures of 200 C and
higher for a long time [225].
TABLE 7.4
Physic-Mechanical Properties of Polyesteresterketones of Company
“Hoechst”
Property
Unreinforced
Containing 30 weight %
Glass fiber
Carbon fiber
Density, g/cm
3
1.3
1.55
1.45
Linear shrinkage, %
1.5
0.5
0.1
Tensile strength, N/mm
2
86
168
218
Breaking elongation, %
3.6
2.2
2.0
Modulus in tension, kN/mm
2
4
13.5
22.5
Impact toughness notched, J/m
51
71
60
Heat resistance, °С
160
Above 320
320
The polyesteresterketone found application in household goods (in this
case its high heat resistance and impact toughness are being used), in lor-
ries (joint washers, bearings, probes bodies, coils and other details, con-
tacting fuel, lubricant and cooling fluid).
