Chemistry Reference
In-Depth Information
Figure 8.22 Tensile and flexural properties. (a) Strength and (b) modulus of the
cured neat UPR and UPR/COPERMA resins.
Figure 8.23
(a) Tensile failure strain and (b) impact strength of the cured neat UPR
and UPR/COPERMA resins.
COPERMA resin showed a decrease in breaking strain from 2.63 to 1.69%.
The impact strength of the neat UPR was 1.75 kJ m
2
. No obvious difference
in impact strength was observed when 0-10 wt% of UPR was replaced by
the COPERMA resin. After more than 10 wt% of the UPR was replaced by the
COPERMA resin, the impact strength began to increase. A maximum in-
crease of 122% was observed in UPR/COPERMA20.
