Chemistry Reference
In-Depth Information
8.2
EXPERIMENTAL PART
8.2.1
RAW MATERIALS
• Isotactic polypropylene Malen P-F401 iPP, for extrusion, made by
Orlen SA; flow index 2.4-33.2 g/10 min, yield point in stretching
28.4 MPa, crystallinity level 95%.
• The ethylene-n-octene elastomer s EOE type Engage, synthesized
according to the Insite technological process, manufactured by Du-
Pont Dow Chemical Elastomers (Table 8.1).
• Silanes: Silquest A-172 vinylo-tris (2-methoxyethoxysilane), Sil-
quest A-174-3-methacryloxypropyltrimethoxysilane, manufactured
by Vitco SA.
• Dicumyl peroxide with 99% content of the neat peroxide, manufac-
tured by ELF Atochem.
• Antioxidant tetra-kis (3,5-di-tetra-butyl-4-hydroxyphenyl) propio-
nate, manufactured Ciba-Geigy.
8.2.2
TEST METHOD
Three types of EOE from the wide range offered by the manufacturer were
selected (Table 8.1). The general-purpose elastomers were selected with
high content of octene and a defined characteristic.
TABLE 8.1
Properties of Ethylene-Octene Elastomers Engage
Elastomer type Properties
Engage I
Engage II
Engage III
Co-monomer content, % of weight (
13
C
NMR/FTR)
42
40
38
Density, g/cm
3
, ASTM
0.863
0.868
0.870
Mooney viscosity, ML
(1+4) 121 °C
35
35
8
MFR, deg/min, ASTM D-1238
0.5
0.5
5.0
Shore hardness A, ASTM
D-2240
66
75
75
