Chemistry Reference
In-Depth Information
TABLE 8.5
(Continued)
Properties
PP
TE-1
(Silane
A-174)
TE-2
(Silane
A-172
Properties
PP
TE-1
(Silane
A-174)
TE-2
(Silane
A-172
Tensile shear modulus, MPa
1455
476
430
Bending strength, MPa
39.6
13.0
10.4
Tensile bending modulus, MPa
1499
504
415
Young modulus, MPa
1520
515
502
HDT, load 1.8 MPa, °C
50.5
38
38
Izod notched impact strength, kJ/m
2
3.16
46.7
43.0
8.4 CONCLUSIONS
The conducted tests leaded to developing grounds for the technology for
dynamic vulcanization of materials with thermo-elastoplastic properties,
in which a thermoplastic polymer constitutes a continuous phase, where-
as the dispersed phase consists of cross-linked elastomer particles. Basic
elastomers are polyisoprene with isotactivity level of 85% or higher and
copolymer EOE containing over 30% of n-octene.
The blend properties can be adjusted with content of the elastomeric
phase and with cross-linking silane/peroxide system. The achieved mate-
rial has a heterogeneous structure and favorable set of resistance proper-
ties, including higher Izod notched impact strength as compared to PP.
The developed technology allows for achieving new materials with
preconfigured properties, competitive to the unmodified iPP and to physi-
cal PP/elastomer mixtures. They could be processed in the equipment for
synthetics. These blends may be used as structural materials, characterized
by higher thermal resistance as compared to the unmodified PP. They may
also be a generation of modifiers for polyolefins and polymeric mixtures.
