导电橡胶的导电性能在很大程度上取决于导电性填料的品种和用量。粒子状的炭

The conductive performance of conductive rubber depends to a great extent on the variety and amount of conductive fillers. <br><br>Particulate carbon black is a suitable filler for conductive rubber. It is cheap, provides conductivity, and improves the mechanical strength, fatigue resistance, and aging resistance of vulcanized rubber. The stability of vulcanized rubber is very good. Although carbon fiber fillers are inferior in fatigue and physical properties of raised vulcanizates, they can sometimes achieve extremely high electrical conductivity if used properly and can be used in conductive rubber products that require special functions. <br><br>The metal-based conductive filler can be fine powders such as gold, platinum, silver, copper, nickel, etc. and flakes, foils, or processed into metal fibers. Although gold, platinum and silver precious metals have excellent stability, they are expensive and limited to special uses. Copper and nickel fillers have lower prices, but they are easy to oxidize and reduce conductive properties. The precious metal conductive agent can be coated on the surface of inexpensive metal particles, glass beads, fibers, etc. to achieve a balance between performance and cost. <br><br>The type and amount of filler are critical to the electrical conductivity of rubber products. As the amount of conductive filler increases and the particle size decreases, the number of filler particles increases. At the beginning, the conductivity does not increase significantly. When the conductive filler particles reach a certain value, the conductivity will jump, a few or ten Several orders of magnitude. After the amount of conductive filler reaches or exceeds a certain critical value, the rubber filled with conductive filler becomes conductive rubber. This critical value corresponds to the critical value of the conductive filler particles in the composite material starting to form a conductive path. <br><br>Different conductive fillers are in the same rubber, or the same conductive filler is in different rubbers, the critical value is different. In EPDM, when the amount is unchanged, it is obvious that SCF carbon black has the highest conductivity, while acetylene carbon black is the smallest. The conductivity is below 1000 Ω · cm. The amount of SCF carbon black used at this point is at least 20 parts, while the use of acetylene carbon black is at least 60 parts, and the remaining carbon black is about 40 parts. With the increase of acetylene carbon black content in NR, the electrical resistivity of the compound decreases. Considering the physical and mechanical properties of the rubber compound, the amount of acetylene black added should not exceed 80 parts.

The conductive properties of conductive rubber depend to a large extent on the variety and dosage of conductive fillers.<br><br>Particle-like carbon black is used as a suitable filler for conductive rubber, cheap, can provide conductivity, improve the mechanical strength of vulcanized glue, fatigue resistance and durable aging properties, the stability of vulcanized glue is very good. Although the fatigue and physical performance of the carbon fiber filler is poor in terms of the fatigue and physical performance of the thiopental sulfide gel, it can sometimes be used in a proper way to obtain the conductive properties of the pole, which can be used in conductive rubber products that require special functions.<br><br>Metal conductive fillers can be used in fine powders such as gold, platinum, silver, copper, nickel and other fine powders and flakes, foils or processed into metal fibers. Gold, platinum and silver precious metals are highly priced and limited for special purposes, although they are highly stable. Copper and nickel fillers are cheaper, but easily oxidized, reducing conductivity. The precious metal conductor can be applied to the surface of cheap metal particles, glass beads, fibers, etc. to achieve a balance of performance and cost.<br><br>The type and dosage of the filler is essential to the conductivity of rubber products. With the increase of the amount of conductive filler and the decrease of particle size, the number of filler particles increases, the initial conductivity increase is not obvious, when the conductive filler particles reach a certain value, the conductivity will occur a jump, a sharp increase of several or a dozen orders of magnitude. After the amount of conductive filler has reached or exceeded a certain threshold, the conductive filler filled rubber becomes conductive rubber. This threshold is equivalent to the threshold of conductive filler particles in composite materials that begin to form conductive pathways.<br><br>Different conductive fillers are in the same rubber, or the same conductive filler is in different rubbers, and the threshold is different. In EPDM, when the dosage is unchanged, it is obvious that SCF carbon black has the highest conductivity, while acetylene carbon black is the smallest. The conductivity is below 1000 o 'cm, the amount of SCF carbon black at this point is at least 20 parts, while the use of acetylene carbon black is at least 60 parts, the rest of the carbon black is about 40. In NR, the resistivity of the adhesive decreased with the increase of the black content of acetylene carbon. Considering the physical and mechanical properties of the adhesive, it is appropriate for the addition of acetylene carbon black to no more than 80 servings.

The conductivity of conductive rubber depends on the variety and amount of conductive filler to a great extent.<br>Particle like carbon black is a suitable filler for conductive rubber, which is cheap, can provide conductivity, improve the mechanical strength, fatigue resistance and durability of vulcanizate, and the stability of vulcanizate is very good. Although carbon fiber fillers are poor in improving the fatigue and physical properties of vulcanizates, if used properly, they can sometimes obtain extremely high conductivity, which can be used for conductive rubber products requiring special functions.<br>Metal conductive fillers can be made of gold, platinum, silver, copper, nickel and other fine powders, flakes, foils or processed into metal fibers. Although gold, platinum and silver precious metals have excellent stability, they have high prices and are limited to special applications. Copper and nickel fillers are cheap, but easy to oxidize and reduce the conductivity. Precious metal conductive agent can be coated on the surface of cheap metal particles, glass beads, fibers, etc. to achieve the balance of performance and cost.<br>The type and amount of filler are very important to the conductivity of rubber products. With the increase of the amount of conductive filler and the decrease of the particle size, the increase of the number of filler particles is not obvious at the beginning. When the conductive filler particles reach a certain value, the conductivity will have a jump, increasing several or more orders of magnitude. When the amount of conductive filler reaches or exceeds a certain critical value, the rubber filled with conductive filler becomes conductive rubber. The critical value is equivalent to the critical value of the conductive filler particles in the composite material to form the conductive path.<br>Different conductive fillers in the same rubber, or the same conductive filler in different rubber, the critical value is different. When the amount of EPDM is constant, it is obvious that SCF carbon black has the highest conductivity, while acetylene carbon black is the smallest. When the conductivity is below 1000 Ω· cm, the amount of SCF carbon black used at this point is at least 20 phr, while that of acetylene carbon black is at least 60 phr, and that of other carbon black is about 40 phr. With the increase of acetylene carbon black content in NR, the resistivity of rubber decreased. In consideration of the physical and mechanical properties of the rubber, the addition of acetylene carbon black should not exceed 80 parts.