Rubber/acetylene black conductive material as well as preparation method and application thereof
A technology of acetylene carbon black and conductive materials, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, electric recording technology using charge patterns, and equipment for electric recording technology using charge patterns, etc., can solve the problem of non-independent intellectual property rights Technology and production capacity, high price of epichlorohydrin rubber, high processing temperature, etc., to achieve good mechanical properties, stable electrical conductivity, and excellent aging resistance
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Embodiment 1
[0053] Natural rubber (NR) is selected, and the formula (mass ratio, the same below) is as follows: NR 100, acetylene carbon black (ACET) and resorcinol and hexamethylenetetramine complex (RH) are shown in Table 1 , Is a variable; stearic acid 2, ZnO 4, accelerator TMTM 1.5, accelerator DM 0.5, antioxidant 4010NA 1, sulfur 1.5. It is mixed at room temperature on a Φ160 open mill, and then vulcanized on a 25-ton flat vulcanizing machine at a vulcanization temperature of 143°C. Table 1 lists the conductive and mechanical properties of NR / ACET / RH conductive composite vulcanizates. It can be seen from the table that as the amount of ACET increases, the conductivity and tensile strength of the vulcanizate of the NR / ACET / RH system increase to a certain extent, and the hardness shows an upward trend. After RH is added, the conductivity of the material decreases to a certain extent, but spray The frost phenomenon is effectively solved, and the tensile strength and hardness of the mate...
Embodiment 2
[0057] The rubber is made of nitrile rubber (NBR). The formula is as follows: NBR 100, resorcinol and hexamethylenetetramine complex (RH), acetylene carbon black (ACET) as a variable, stearic acid 2, ZnO 5, Accelerator CZ 1.5, Accelerator DM 0.5, Anti-aging agent 4010NA 1, Sulfur 2. It is mixed at room temperature on a Φ160 open mill, and then vulcanized on a 25-ton flat vulcanizer at a vulcanization temperature of 170℃.
[0058] Table 2: Conductivity and mechanical properties of NBR / ACET / RH vulcanizates
[0059]
[0060] It can be seen from Table 2 that with the increase in the amount of ACET, the conductive performance and tensile strength of the conductive composite material have been improved, but compared with Table 1, in the case of a smaller filling amount, it can be seen that NBR / ACET / RH The electrical conductivity and mechanical properties of the system are not as good as the NR / ACET / RH system.
Embodiment 3
[0062] The rubber is natural rubber, the formula is as follows: NR 100, ACET20, resorcinol and hexamethylenetetramine complex (RH) 5, insoluble S variable, ZnO 5, stearic acid 2, accelerator (TMTM) 1 , Anti-aging agent (4010NA) 1. The tablets are mixed in an open mill at room temperature, and then vulcanized on a plate vulcanizer under the condition of 143℃×positive vulcanization time (min). Table 3 shows the electrical conductivity and mechanical properties of the natural rubber / acetylene carbon black conductive composite system with different vulcanizing agents added. It can be seen that the increase in the amount of insoluble S has the effect of improving the conductivity and mechanical properties of the composite material to a certain extent, but if the amount is too large, excessive crosslinking will destroy the conductive network structure and cause aging (70 。 C, 72h), the material can maintain good electrical conductivity and mechanical properties.
[0063] Table 3: Con...
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