Low phenyl siloxane rubber-based wide temperature-range and high-damping material

Abstract

The invention discloses a low phenyl siloxane rubber-based wide temperature-range and high-damping material, which comprises following components in percentage by mass: 50.8 to 78.7 percent of low phenyl siloxane rubber, 2.5 to 3.9 percent of vinyl silicone oil, 15.8 to 45.6 percent of white carbon black, 0.8 to 1.2 percent of peroxide vulcanizer and 0.3 to 0.4 percent of pigment. The damping material is improved on the conventional materials and has high damping, vibration-insulation and buffering properties and a high mechanical property in a relatively wide temperature range; the material can meet requirements for use under the following conditions: the stretching strength is more than or equal to 5 MPa, the elongation rate at rupture is more than or equal to 200 percent, the permanentdeformation rate at rupture is less than or equal to 25 percent, the damping coefficient beta max is more than or equal to 0.2 and the temperature is 50 DEG C below zero to 150 DEG C. The low phenyl siloxane rubber-based wide temperature-range and high-damping material has be been applied to a plurality of devices or instruments, achieves considerable vibration insulation and buffering effects and therefore can be applied to instruments and electronic systems of airplanes, ships and vehicles for vibration control and noise control and has a promising application prospect.

Description

technical field [0001] The invention relates to a wide temperature (in the temperature range of -50 ~ +150 ℃) high damping (damping coefficient β max ≥0.2) materials, especially related to a wide temperature and high damping material based on low phenyl silicone rubber (phenyl content less than 7%), belonging to the technical field of damping material formulation design, mainly used as damping rubber for isolators / vibration absorbers Additional damping treatment of materials and structures. Background technique [0002] The damping vibration isolation technology developed based on the viscoelastic damping material is an effective way to control vibration, impact and noise, and an effective means to improve the mechanical environment of structures and equipment, especially for broadband random vibration and impact problems of high-precision equipment Even more irreplaceable, viscoelastic damping materials and their products have been widely used in the vibration and noise co...

AI Technical Summary

Problems solved by technology

[0003] The applicable temperature of existing damping materials in China is generally around -30~+100℃, the damping factor β is only up to about 0.2, the tensile strength is low, and either the applicable temperature range is narrow or the damping factor is low, which cannot reach a wide temperature range. It has both good damping and vibration isolation performance and good mechanical properties. Compared with the performance of foreign damping materials, there is a big gap, and it can no longer meet the requirements of complex and harsh environments. Therefore, it is urgent to improve the existing materials and develop the use of Wider temperature range (-50~+150℃), higher damping factor (damping coefficient β max ≥0.2) damping material to meet the needs of various equipment and instruments

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