Figure 4 compares data obtained from the notched Izod test
for neat PLA and the two PB blends.
The most popular test in North America is the notched Izod test
while the counterpart that seems to be currently favored in Europe is the Charpy test.
The position of the brittle/tough transition in terms of rubber content determined by the standard notched Izod test
is basically the same as that determined by the EWF procedure.
At higher concentrations and temperatures above the glass transition temperature (-28 degC), a no break point in the Notched Izod test
can be achieved.
The previously discussed tests are static mechanical properties tests, whereas the Izod test
There is also a specimen support--a vise for the Izod test
and an anvil for the Charpy test.
The notched impact strength obtained by the Izod test
as a function of EPDM-g-MA composition for PTT/EPDM-g-MA blends is shown in Fig.
As the whitened area of the Izod test
piece, the proportion (%) of the area of a whitened portion to the total broken area (fixed) of the test piece is obtained.
Finally, with these mechanisms, MMA/ST resin/MOD molding Izod test
results are explained.
The polyethylenes were not broken in the Izod test
, and toughnesses were apparently very high; see Table 2.