Effect of Functionalization of Carbon Black on Rubber Properties

More documents

Recommendations

Info

0.24 0.21 0.18 0.15 0.12 0.09 0.06 0.03 0.00 measurement, CRX2124 shows a 24% reduction in tan δmax relative to the carbon black control and this difference is further increased to 33% by the addition <strong>of</strong> 1.0 phr TESPT. Both results from strain and temperature sweeps suggest that owing to its lower hysteresis at high temperature, CRX2124 will give substantially lower rolling resistance in relation to carbon black. Abrasion resistance tan δ max N110 CRX2124 + TESPT 1.0 phr As discussed earlier, with regard to abrasion resistance, silica has a significant deficiency in polymer-filler interaction. In NR, the deficiency cannot be effectively compensated for by chemical linkages between polymer molecules and the silica surface via the coupling agent as the reactive groups, i.e., silanols may be blocked by adsorbed non-rubbers. 12 This could also be applied to the silica domain on CSDPF. However, as indicated in Figure 15, the abrasion index <strong>of</strong> the CRX2124-filled compound measured at 7% slip ratio is only about 17% lower than its carbon black counterpart. The negative impact <strong>of</strong> the silica domain on the abrasion resistance seems to be partially <strong>of</strong>fset by the high surface activity <strong>of</strong> carbon domain on the aggregates. By addition <strong>of</strong> 1.0 phr TESPT, the abrasion resistance <strong>of</strong> CRX2124 can be further improved, making it closer to that <strong>of</strong> carbon black N134, one <strong>of</strong> the preferred reinforcing fillers for truck tire tread. 18 NR, Filler: 50 phr 70°C, 10 Hz CRX2124 Figure 14. Comparison <strong>of</strong> tan δ max <strong>of</strong> NR compounds filled with a variety <strong>of</strong> fillers
140 120 100 80 60 40 20 0 Wet skid resistance Abrasion index, % N110 CRX2124 + TESPT 1.0 phr Illustrated in Figure 16 are the BPST indexes <strong>of</strong> CRX4210-filled vulcanizates referenced to the skid resistance <strong>of</strong> the compound filled with carbon black N134. As can be seen, the CRX2124-based compounds show higher wet skid resistance, and additional TESPT does not show a significant effect. Of course, these observations need to be verified via actual tire testing. 19 NR, Filler: 50 phr 7% slip CRX2124 Figure 15. Comparison <strong>of</strong> abrasion resistance <strong>of</strong> NR compounds filled with a variety <strong>of</strong> fillers 106 104 102 100 98 96 94 92 BPST index, % NR, Filler- 50 phr N134 CRX2124 + TESPT 1.0 phr CRX2124 Figure 16. Comparison <strong>of</strong> wet skid resistance <strong>of</strong> NR compounds filled with a variety <strong>of</strong> fillers
Page 1 and 2: Effect of<
Page 3 and 4: carbon blacks to improve the trade<
Page 6 and 7: Table I. Analytical properties <str
Page 8 and 9: Before ashing After ashing Figure 4
Page 10 and 11: 12.0 10.0 8.0 6.0 4.0 2.0 0.0 Strai
Page 12 and 13: 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2
Page 14 and 15: Wet skid resistance: The results <s
Page 17: compounds. With this filler, the hi

Effect of Functionalization of Carbon Black on Rubber Properties

Create successful ePaper yourself

Delete template?

Save as template?