Chemistry Reference
In-Depth Information
III, with the lowest octene content, were characterized by slightly lower
variables of tensile strength (tension at the tear off), elongation and hard-
ness, but by a much higher tension at the yield point and high flow index.
TABLE 8.2
Selected Properties of the Dynamically Cross Linked Blends in Relations To
PP/EOE Ratio
Ratio PP/Engage I, % of weight
100/0
85/15
70/30
55/45
40/60
Hardness, °ShD
80
63
57
50
36
MFR (190 °C, 2.16 kg), g/10 min
2.4
1.63
1.29
1.28
1.15
MFR (190 °C, 5), g/10 min
—
5.06
5.89
5.80
4.90
T
A 120
, °C*
152
143
130
106
~60
Hardness HK, MPa**
24.7
16.1
12.2
11.8
8.7
Solubility of elastomer in cyclohex-
ane, %
13.9
12.03
14.2
—
—
Solubility of elastomer <t4/> in boil-
ing xylene, %
24.0
33.0
42.0
—
—
*T
A120 -
Vicat softening point; **HK - ball pan hardness method.
FIGURE 8.3
Mechanical properties of the dynamically cross linked blends in relation to
PP/EOE ratio, (a) tensile strength, (b) elongation at the tear off.
