Chemistry Reference
In-Depth Information
TABLE 8.4
Results of the Thermogravimetric Analysis of Ipp/EOE-55/45% Blend
(Engage I)
PL-1(Silane A-172)
PL-2 (Silane A-174)
Temperature, °C
Decrease of weight, %
Temperature, °C
Decrease of weight, %
230
0.23
230
0.36
300
7.43
300
7.66
352
25.97
378
54.36
363
40.06
405
89.63
430
94.05
426
94.36
In temperature 300 °C came to as much as 7.5%, and the further increase
of temperature caused the progressive degradation process. Analysis of
the morphological structure of grafted/cross-linked iPP/Engage I blend us-
ing the SEM, DSC and DMTA methods showed that the blends produced
with dynamic vulcanization had a special two-phase structure. With scan-
ning electron microscopy photographs of surface of turning points of iPP
samples and iPP/Engage I 55/45% blends have been made (Fig. 8.4). The
SEM analysis showed that the obtained blends were mixtures of two ther-
modynamically nonmiscible structures. The continuous phase of iPP had
a visible semicrystal structure and the spherical and oval molecules of the
dispersed properties, assessed with the DMTA Mk II equipment manufac-
tured by Polymer Laboratories in the sinusoidally variable load conditions
at bending with frequency of 1 Hz, in the temperature range between −100
and +100 °C also showed heterogeneous structure of the produced blends.
FIGURE 8.4
SEM microphotographs of: (a) neat iPP, (b) dynamically cross-linked PP/
EOE blend 55/45%; magnification 2000x.
