SAMPE Journal - March/April 2022 - 48

FEATURE / LOW-COST TEXTILE GRADE CARBON FIBER
Table 4. Mechanical and physical properties of 10% and 40% CF PA66 samples extracted from
injection molded quarter fender part(s). The TCF data is compared to commercial Zoltek PANEX 35/
PA66 fiber composite*.
40% CF-PA66
Property
Tensile strength@ yield
Tensile elongation @
break
Flexural strength
Flexural modulus
Notched Izod
HDTUL@264 psi
Surface resistivity
*1 Ksi = 6.895 MPa; 1 ft-lb.=4.448 J/m
Figure 6. Injection molded 10 wt% TCF-PA66 quarter fender (a) part dimension; (b) Thermal DIC map
of the part.
Units
psi
%
psi
psi
ft-lb/in
°
F
ohms/sq
Commercial
CF
37,000
1.8
37,300
TCF
28,100
1
37,000
3,900,000 3,840,000
1.30
489
1.01
484
2.20E+03
1.10E+04
10% CF-PA66
Commercial
CF
27,000
2.4
30,000
TCF
19,800
2.2
28,500
1,000,000 1,260,000
0.50
479
0.60
468
3.20E+05
1.99E+12
(a)
(b)
fiber composite. However, the tensile and flexural
modulus were either comparable (for 10wt. %
TCF-PA66) or ~26% higher (for 40wt.% TCF-PA66)
than the commercial fiber composite. These are
consistent with the finding reported in9
, where the
TCF has 23% lower starting strength but equivalent
modulus to the Zoltek PANEX 35 fiber. This trend
translates into injection molded composites
produced with the TCF.
Digital Image Correlation (DIC) is being
increasingly developed as a non-contact
nondestructive evaluation (NDE) method for large
composite structures such as automotive, aircraft
etc14
high resolution to detect surface and sub-surface
material anomalies14
advance
composite
of the injection molded component using results
from an
. DIC provides full field imaging and has
. Figure 6b shows the quality
characterization
Figure 7. TDIC data on three parts. The y-axis is temperature (°C) and x-axis
is time (s).
48 | SAMPE JOURNAL | MARCH/APRIL 2022
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SAMPE Journal - March/April 2022

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