Wide-temperature range high-damping rubber bearer and preparation technology thereof

Abstract

The invention belongs to the technical field of a rubber bearer and discloses a wide-temperature range high-damping rubber bearer and a preparation technology thereof. The wide-temperature range high-damping rubber bearer comprises, by mass, 70-90 parts of natural rubber, 10-30 parts of styrene-butadiene rubber, 10-60 parts of high styrene resin, 4-10 parts of an activator, 50-80 parts of super abrasion furnace black, 5-20 parts of tripoli, 10-30 parts of ultrafine Illite-smectite clay powder, 15-30 parts of calcium carbonate, 10-30 parts of machine oil, 1.5-2.5 parts of a vulcanizing agent and 1.4-3.5 parts of a promoter. The wide-temperature range high-damping rubber bearer utilizes high styrene resin to replace petroleum resin in the traditional high-damping bearer, increases a vitrification point area and widens a damping temperature. Through reasonable matching of inorganic filling material types and use amounts, a damping ratio of the high-damping rubber bearer is improved and shear modulus and elastic modulus of the bearer are balanced.

Description

technical field [0001] The invention belongs to the technical field of high-damping rubber bearings, and in particular relates to a wide-temperature-range high-damping rubber bearing with a wide glass transition temperature range, a maximum damping ratio temperature, and a high damping ratio, and a preparation process thereof. Background technique [0002] High-damping rubber bearings are widely used in the field of shock absorption and isolation of bridges and buildings. They dissipate or absorb the energy generated by seismic waves during earthquakes, convert mechanical energy into heat energy, slow down the damage to buildings caused by earthquakes, and protect the safety of life and property. [0003] The rubber used in the high damping rubber bearing is mainly natural rubber. It is well known that polymer materials have greater damping near the glass transition temperature (Tg). Near the glass transition temperature, the chain segment can fully move but cannot keep up,...

AI Technical Summary

Problems solved by technology

The glass transition region of rubber damping materials is mostly in the low temperature region below room temperature, which is often very narrow, generally in the glass transition temperature range of 20-30°C, and the damping effect of rubber is often limited by this

[0004] In engineering applications, although the high-damping rubber bearing is equipped with diene rubber such as styrene-butadiene, cis-butylene, and chloroprene, and petroleum resins that do not participate in cross-linking reactions to increase the damping ratio, the maximum damping ratio temperature is still It is below zero, so that it cannot be used in the best condition at room temperature. Therefore, it is necessary to widen the glass transition temperature zone of the high-damping rubber bearing, broaden the damping temperature, and make it have a higher damping function in a wide temperature and wide frequency range. Give full play to the high damping performance of rubber and expand the scope of application in the engineering field

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