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High-damping rubber material with strain rate sensitive characteristic and preparation method thereof
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A technology of rubber material and sensitive characteristics, applied in the field of railway traffic shock absorption materials, can solve the problems of increasing cost, unsolved compression permanent deformation of modified rubber, increasing the difficulty of vulcanization of blended rubber, etc., to achieve impact resistance and vibration reduction. The effect of improved performance, high molding consistency, and increased tendency to increase stiffness
Pending Publication Date: 2022-05-10
XIAN UNIV OF TECH
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Problems solved by technology
The damping performance of the modified EPDM rubber obtained in this patent has been improved, but the problem of the compression set of the modified rubber has not been solved, and due to the addition of butyl rubber in the system, the blended rubber inevitably increases. Vulcanization is difficult, increasing costs
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preparation example Construction
[0035] The preparation method of the present invention is as follows:
[0036] Step 1, first weigh 100 parts of EPDM rubber (mass ratio, the same below), 5-30 parts of white carbon black reinforced polyborosiloxane, 5 parts of zincoxide, 2-3.5 parts of processing aid, anti-aging agent 2-4.5 parts, 5 parts of damping additive, 35-45 parts of carbon black N33035, 15-20 parts of carbon black N5501, 15 parts of plasticizer, 3 parts of accelerator, 2-2.5 parts of vulcanizing agent;
[0037] Step 2, mixing EPDM rubber and white carbon black reinforced polyborosiloxane in an internal mixer for 120s at a temperature of 50-60°C to obtain a composite matrix;
[0038] Step 3, adding damping aid, zincoxide, processing aid, and anti-aging agent to the composite matrix in sequence, controlling the temperature to 60-70°C, and banburying evenly;
[0039] Step 4, continue to add carbon black N330, N550, plasticizer, banbury for 240s to obtain the preform; step 5, control the temperature bel...
[0045] (1) First weigh 100 parts of EPDM rubber (mass ratio, the same below), 5 parts of white carbon black reinforced polyborosiloxane, 5 parts of zinc oxide, 2 parts of processing aid, 2 parts of anti-aging agent, damping 5 parts of additives, 35 parts of carbon black N33035, 15 parts of carbon black N5501, 15 parts of plasticizer, 3 parts of accelerator, 2 parts of vulcanizing agent.
[0046] (2) Mix EPDM rubber and white carbon black-reinforced polyborosiloxane in an internal mixer for 120 s, and adjust the temperature to 50-60° C. to obtain a composite matrix.
[0047] (3) Add damping aid, zinc oxide, processing aid and anti-aging agent to the composite matrix in sequence, control the temperature at 60-70°C, and banbury evenly.
[0048] (4) Continue to add carbon black N330, N550 and plasticizer, and banbury for 240s to obtain a preform.
[0049] (5) Control the temperature below 80°C, add an accelerator and a vulcanizing agent to the preform, and continue banburying for...
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Abstract
The embodiment of the invention relates to a high-damping rubber material with a strain rate sensitive characteristic and a preparation method of the high-damping rubber material. EPDM (Ethylene-Propylene-DieneMonomer) and white carbon black reinforced polyborosiloxane are internally mixed in an internal mixer to obtain a composite matrix; sequentially adding a damping aid, zincoxide, a processing aid and an anti-aging agent into the composite matrix, and uniformly mixing; continuously adding carbon black N330, N550 and a plasticizer, and banburying to obtain a preform; adding an accelerant and a vulcanizing agent into the preform, and internally mixing to obtain a to-be-vulcanized body; and vulcanizing and molding. The embodiment of the invention aims to provide the high-damping rubber material with the strain rate sensitive characteristic and the preparation method of the high-damping rubber material, and the compression deformation capability of modified rubber is solved by adjusting a formula, so that the damping performance of blended rubber is further improved.
Description
technical field [0001] The invention belongs to the field of railway traffic damping materials, and in particular relates to a high damping rubber material with strain rate sensitive characteristics and a preparation method thereof. Background technique [0002] my country's railway sleepers are gradually changed from sleepers to concrete sleepers. After the replacement, although the service life of the sleeper is extended and the stability of the track frame structure is improved, the elasticity of the track is significantly reduced, resulting in poor cushioning of the track to the wheel-rail impact. In order to improve the cushioning performance of concrete sleepers, reduce the impact force of the sleeper on the ballastbed, and increase the insulation, the current common method is to use elastic polymers to solve the elastic problem of concrete sleeper tracks. [0003] The railway sleeper rubber backing plate / sheet is used to lay an elastic cushion between rails or concr...
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