THERMAX versus Furnace Blacks

Transcription

1 THERMAX versus Furnace Blacks With a particle size approximately ten times that of N33 furnace black, N99 has the smallest surface area of all the blacks commonly used in compounding rubber. These characteristics result in a material with little tendency to interact with polymers or interfere with curing systems. Although it is not a reinforcing black, it is useful to compare N99 with the furnace blacks in various rubber compounds such as butyl, natural; Neoprene W, nitrile and SBR (see Figures 1-). As the black particle size increases, the following effects occur: modulus and tensile strength decline, hardness decreases, elongation increases, and tear strength decreases. The level of carbon black used in this comparison is adequate for differentiating from the furnace blacks, but is not high enough to develop the optimum properties of thermal black loading. Note that the hardness of thermal black loaded natural rubber is similar at 1 phr to the hardness of the same compound containing 7 phr of furnace black. This is a graphic demonstration of the non-reinforcing properties of thermal black.

2 Figure 1a N99 versus Furnace Blacks* in Butyl Rubber Modulus % MODULUS (mpa) N99 N77 N66 N N33 N22 *Butyl Rubber cured 2 minutes at 171 C Source R.T. Vanderbilt Formula See Appendix III Figure 1b N99 versus Furnace Blacks* in Butyl Rubber tensile strength 18 TENSILE STRENGTH (MPa) N99 N77 N66 N N33 N22 *Butyl Rubber cured 2 171C Source R.T. Vanderbilt Formula See Appendix III

3 Figure 1c N99 versus Furnace Blacks* in Butyl Rubber ultimate elongation 7 ULTIMATE ELONGATION (%) N99 N77 N66 N N33 N22 *Butyl Rubber cured 2 171C Source R.T. Vanderbilt Formula See Appendix III Figure 1d N99 versus Furnace Blacks* in Butyl Rubber hardness 9 8 HARDNESS (Shore A) N99 N77 N66 N N33 N22 *Butyl Rubber cured 2 171C Source R.T. Vanderbilt Formula See Appendix III

4 Figure 1e N99 versus Furnace Blacks* in Butyl Rubber tear strength 8 7 TEAR STRENGTH (kn/m) N99 N77 N66 N N33 N22 *Butyl Rubber cured 2 171C Source R.T. Vanderbilt Formula See Appendix III

5 Figure 2a N99 versus Furnace Blacks* in Natural Rubber Modulus 3% MODULUS (MPa) N99 N77 N66 N N33 N22 * - Natural Rubber Cured 1 13 C Figure 2b N99 versus Furnace Blacks* in Natural Rubber tensile strength 3 TENSILE STRENGTH (MPa) N99 N77 N66 N N33 N22 * - Natural Rubber cured 1 13 C

6 Figure 2c N99 versus Furnace Blacks* in Natural Rubber ultimate elongation 8 ULTIMATE ELONGATION (%) N99 N77 N66 N N33 N22 * - Natural Rubber cured 1 13 C Figure 2d N99 versus Furnace Blacks* in Natural Rubber hardness HARDNESS (SHORE A) N99 N77 N66 N N33 N22 * - Natural Rubber cured 1 13 C

7 Figure 2e N99 versus Furnace Blacks* in Natural Rubber tear strength TEAR STRENGTH (kn/m) N99 N77 N66 N N33 N22 * - Natural Rubber cured 1 13 C

8 Figure 3a N99 versus Furnace Blacks* in Chloroprene Rubber Modulus 3% MODULUS (MPa) N99 N77 N66 N N33 N22 * - Neoprene W cured 2 13 C Figure 3b N99 versus Furnace Blacks* in Chloroprene Rubber tensile strength TENSILE STRENGTH (MPa) N99 N77 N66 N N33 N22 * - Neoprene W cured 2 13 C

9 Figure 3c N99 versus Furnace Blacks* in Chloroprene Rubber Ultimate elongation 8 ULTIMATE ELONGATION (%) N99 N77 N66 N N33 N22 * - Neoprene W cured 2 13 C Figure 3d N99 versus Furnace Blacks* in Chloroprene Rubber hardness 9 8 HARDNESS (SHORE A) N99 N77 N66 N N33 N22 * - Neoprene W cured 2 13 C

10 Figure 3e N99 versus Furnace Blacks * in Chloroprene Rubber tear strength 6 TEAR STRENGTH (kn/m) N99 N77 N66 N N33 N22 * - Neoprene W cured 2 13 C

11 Figure 4a N99 versus Furnace Blacks* in Nitrile Rubber Modulus 3% MODULUS (MPa) N99 N77 N N33 N11 * - Nitrile Rubber cured 3 14C Source - R.T.Vanderbilt Figure 4b N99 versus Furnace Blacks* in Nitrile Rubber Tensile Strength 3 TENSILE STRENGTH (MPa) N99 N77 N N33 N11 * - Nitrile Rubber cured 3 14C

12 Figure 4c N99 versus Furnace Blacks* in Nitrile Rubber ultimate elongation 8 ULTIMATE ELONGATION (%) N99 N77 N N33 N11 * - Nitrile Rubber cured 3 14C Figure 4d N99 versus Furnace Blacks* in Nitrile Rubber hardness 8 7 HARDNESS (Shore A) N99 N77 N N33 N11 * - Nitrile Rubber cured 3 14C

13 Figure 4e N99 versus Furnace Blacks* in Nitrile Rubber tear strength 4 TEAR STRENGTH (kn/m) N99 N77 N N33 N11 * - Nitrile Rubber cured 3 14C

14 Figure a N99 versus Furnace Blacks* in Styrene Butadiene Rubber Modulus % MODULUS (MPa) N99 N77 N66 N N33 N22 * - SBR cured 1 13C Figure b N99 versus Furnace Blacks* in Styrene Butadiene Rubber tensile strength TENSILE STRENGTH (MPa) N99 N77 N66 N N33 N22 * - SBR cured 1 13C

15 Figure c N99 versus Furnace Blacks* in Styrene Butadiene Rubber ULTIMATE ELONGATION 8 ULTIMATE ELONGATION (%) N99 N77 N66 N N33 N22 * - SBR cured 1 13C Figure d N99 versus Furnace Blacks* in Styrene Butadiene Rubber HARDNESS 8 7 HARDNESS (Shore A) N99 N77 N66 N N33 N22 * - SBR cured 1 13C

16 Figure e N99 versus Furnace Blacks* in Styrene Butadiene Rubber TEAR STRENGTH 4 TEAR STRENGTH (kn/m) N99 N77 N66 N N33 N22 * - SBR cured 1 13C