Ultra-high damping rubber composite material and preparation process of rubber composite material

Abstract

The invention belongs to the technical field of rubber and discloses an ultra-high damping rubber composite material and a preparation process of the rubber composite material. The preparation process disclosed by the invention is mainly technically characterized by comprising the following steps of: adding short fibers, carbon black, petroleum resin, a plasticizer, a vulcanizing agent, an active agent, an accelerant and an anti-aging agent in rubber; and mixing the components in an internal mixer and then vulcanizing in a flat vulcanizing machine. According to the ultra-high damping rubber composite material disclosed by the invention, a predetermined amount of short fibers, carbon black and petroleum resin are uniformly dispersed in a rubber matrix; compared with the common high-damping material, the damping coefficient of the ultra-high damping rubber composite material disclosed by the invention is increased by more than 20%; and the ultra-high damping rubber composite material disclosed by the invention has the advantages of being strong in energy consumption property and ductility and obvious in damping and shock insulating effects, effectively controlling the earthquake response of shock insulating structures, and being environment-friendly and stable in property. The stretching strength is greater under the condition with the same hardness, so that a rubber bearing prepared by the ultra-high damping rubber composite material disclosed by the invention is greater in bearing force; the whole size of the bearing is smaller than the size of the traditional high-damping rubber bearing; and the rubber bearing has the advantages of saving the use space, being convenient to construct and more excellent in resistance to fatigue performance.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to an ultra-high damping rubber composite material and a preparation process thereof. Background technique [0002] Bridge isolation devices are generally divided into three categories, namely laminated rubber isolation devices, sliding friction isolation devices, and combined devices of dampers and isolators. Among them, laminated rubber isolators are the most common. In the laminated rubber isolation device, the ordinary plate-type rubber bearing needs to be used in conjunction with the damper, and the damper is expensive, which limits its scope of use; the lead-core rubber bearing has good damping performance and production process Simple and widely used in bridge isolation design, but lead rubber bearings are prone to aging and cracking during use, and exposed lead cores will cause serious pollution to the surrounding environment, and the isolation frequency band of ...

AI Technical Summary

Problems solved by technology

In the laminated rubber isolation device, the ordinary plate-type rubber bearing needs to be used in conjunction with the damper, and the damper is expensive, which limits its scope of use; the lead-core rubber bearing has good damping performance and production process Simple and widely used in bridge isolation design, but lead rubber bearings are prone to aging and cracking during use, and exposed lead cores will cause serious pollution to the surrounding environment, and the isolation frequency band of lead rubber bearings is narrow. It cannot realize the function of effective shock absorption for seismic waves with various frequency characteristics. After the earthquake, the lead core inside the support will yield and fracture, and the self-recovery ability of the isolation system will be greatly reduced; The support is the same, it is made of viscoelastic high damping rubber material, it can absorb energy itself, integrate with the energy dissipation function, and has self-resetting ability after earthquake deformation, but the disadvantage of this support is its equivalent The damping ratio is generally 10-20%, and the damping performance is far lower than that of lead rubber bearings.

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