Studies on the use of nano zinc oxide and modified silica in NR, CR ...
Studies on the use of nano zinc oxide and modified silica in NR, CR ...
Studies on the use of nano zinc oxide and modified silica in NR, CR ...
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Chapter 7<br />
126<br />
Torque (dNm)<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
0 20 40<br />
Time (m<strong>in</strong>)<br />
nr ppt<br />
10<br />
8<br />
neat<br />
6<br />
IPPD<br />
4<br />
nr brab<br />
2<br />
IPPD 0<br />
Torque (dNm)<br />
0 20<br />
Time (m<strong>in</strong>)<br />
40<br />
(a) (b)<br />
Torque (dNm)<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
0 20 40<br />
Time (m<strong>in</strong>)<br />
(c)<br />
nr philflex<br />
neat<br />
nr philflex<br />
brab<br />
nr<br />
6ppd<br />
brab<br />
nr<br />
6ppd<br />
neat<br />
Figure 7.1 Cure graphs <strong>of</strong> compounds filled with antioxidant <strong>modified</strong> <strong>silica</strong> (nr<br />
IPPD, 6PPD,DPPD(philflex) brabender mixed) <strong>and</strong> with neat <strong>silica</strong><br />
(nr IPPD,6PPD,DPPD(philflex) neat)<br />
7.3.3 Tensile properties<br />
Tensile properties <strong>of</strong> <strong>NR</strong> vulcanizates with antioxidant <strong>modified</strong><br />
<strong>silica</strong> <strong>and</strong> with neat <strong>silica</strong> are shown <strong>in</strong> Table 7.4.<br />
Vulcanizate<br />
Table 7.4 Tensile properties <strong>of</strong> <strong>NR</strong> vulcanizates<br />
Tensile<br />
strength, Mpa<br />
Tensile modulus at<br />
300% el<strong>on</strong>gati<strong>on</strong>, Mpa<br />
El<strong>on</strong>gati<strong>on</strong> at break<br />
%<br />
Tear strength<br />
(N/mm)<br />
E-1 23.28 3.50 966 59<br />
E-2 22.60 3.27 1027 54<br />
F-1 21.05 2.93 1017 60<br />
F-2 20.58 2.76 1066 56<br />
G-1 16.27 2.60 995 56<br />
G-2 16.19 2.52 1036 54
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