Network structure design-based wide-temperature range polyurethane elastomer damping material and method and application thereof

Abstract

The invention belongs to the technical field of damping materials and discloses a network structure design-based wide-temperature range polyurethane elastomer damping material and a method and application thereof. The network structure design-based wide-temperature range polyurethane elastomer damping material is prepared from, by weight part, 11-37 parts of polyurethane prepolymer, 7-30 parts of suspension chain prepolymer and 1-25 parts of terminal hydroxyl hyperbranched polyester, wherein the polyurethane is obtained through reaction of polyester glycol and diisocyanate under the action of catalyst. The network structure design-based wide-temperature range polyurethane elastomer damping material achieves an effective damping temperature range width of 170 DEG C and obtains excellent damping performance within the temperature range width, and the damping factor tan delta is higher than or equal to 0.3. Meanwhile, the network structure design-based wide-temperature range polyurethane elastomer damping material is good in high-temperature and low-temperature damping performance and achieves a high-temperature effective damping temperature up to 120 DEC, thereby having a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of damping materials, and relates to a polyurethane elastomer, in particular to a wide temperature range polyurethane elastomer damping material based on network structure design and its preparation method and application. Background technique [0002] With the rapid development of science and technology, both military and civilian products are developing in the direction of low energy consumption, high speed, and lightweight mechanical automation. At the same time, vibration and noise generated by high automation are flooding every corner of life. The impact on life cannot be underestimated. [0003] The problem of reducing vibration and noise has become a top priority, and domestic and foreign researchers have responded to this problem by exploring new damping materials. Wide temperature range high damping material requires at least 60 ℃ ~ 80 ℃ temperature range (use ambient temperature range), its dampin...

AI Technical Summary

Problems solved by technology

At present, some scholars have explored the introduction of suspension chains (molecular chains with one end fixed in the cross-linked network and the other end can move freely) in polymer materials to improve their damping performance, but the design of damping polymer materials based on a single molecular structure, its The effective damping at high temperature and low temperature is narrow. If the suspension chain content is too high, the mechanical properties of the polymer material will be damaged too much, which cannot meet the actual use requirements.

[0004] Polyurethane elastomer damping materials have become one of the research focuses of elastomer damping materials because of their advantages such as flexible structural design, controllability of preparation, and low price. However, polyurethane damping materials also have the shortcomings common to viscoelastic damping materials. That is, the damping performance below room temperature is good, but the damping effect above room temperature is not good, so the structural design of the polyurethane elastomer damping material is required. The polyurethane elastomer is composed of soft and hard segments, which has strong designability and a reasonable free volume fraction (free volume Holes account for the percentage of the total volume of the polymer), introducing suspension chains to adjust the compatibility of the soft and hard segments of polyurethane elastomers, improving microphase separation, and preparing materials with good damping properties in a wide temperature range, further broadening the range of polyurethane damping materials. The field of application and scope

Images