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High-damping rubber material and preparation method thereof

A rubber material and high damping technology, which is applied in the field of rubber modification, can solve the problems of the migration of small molecules of the second component, the deterioration of physical and mechanical properties, and the decrease of rubber elasticity, so as to achieve low cost, increase modulus, and improve damping performance effect

Active Publication Date: 2017-03-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods generally improve the damping performance by increasing the glass transition temperature of the rubber body or introducing a second component that has a glass transition in the room temperature region, but this often leads to the migration of small molecules of the second component and the decrease in rubber elasticity. , degradation of physical and mechanical properties, etc., and the effect is not obvious in the case of non-polar rubber implementation

Method used

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  • High-damping rubber material and preparation method thereof
  • High-damping rubber material and preparation method thereof
  • High-damping rubber material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Taking solution polymerization styrene-butadiene rubber as the matrix, using azobisisobutyronitrile as the initiator, grafting mercaptoethanol to the solution polymerization styrene-butadiene rubber through mercapto-vinyl click chemical reaction; then using hydroxyl and 2-( 6-isocyanatocarbonylamino)-6-methyl-4-[1H]pyrimidinone reacts to introduce 2-ureido-4[1H]-pyrimidinone quadruple hydrogen bond units into the rubber molecular chain, the quadruple The content of hydrogen bond units is 1%, 5% and 10% of the number of moles of double bonds in the rubber; the solution-polymerized styrene-butadiene rubber containing quadruple hydrogen bond units is mixed with a vulcanization bag by a double-roll mill to obtain a mixed rubber Use a flat vulcanizer to mold at 150°C according to the positive vulcanization time to obtain sample 1, sample 2 and sample 3;

[0034] (2) Using solution-polymerized styrene-butadiene rubber as a matrix, a double-roll mill was used to mix it wit...

Embodiment 2

[0037] (1) take natural rubber as matrix, m-chloroperoxybenzoic acid is oxygenant, and the epoxy natural rubber that preparation epoxidation degree is 10%, 20% and 50%; Filler silica and vulcanization bag were mixed, and the obtained mixed rubber was molded with a flat vulcanizer at 143°C according to the normal vulcanization time to obtain sample 4, sample 5 and sample 6;

[0038] (2) Using natural rubber as the matrix, using a double-roller mill to mix filler silica and vulcanization bags, the obtained mixed rubber was molded with a flat vulcanizer at 143° C. according to the positive vulcanization time to obtain Comparative Sample 2;

[0039] The content of each component is: rubber matrix 100phr, white carbon black 40phr; vulcanization package: zinc oxide 4phr, stearic acid 2phr, accelerator TT 1.2phr, accelerator NS 0.8phr, sulfur 2.0phr, ferric chloride and epoxy The group molar ratio is 1:3.

Embodiment 3

[0041] (1) With isoprene rubber as the base, diisophenylpropylene peroxide as the initiator, the isoprene rubber grafted with maleic anhydride is obtained by free radical grafting reaction; then by amidation reaction, the amino-containing pyridine , triazole, and terpyridine metal ligands are introduced into the rubber molecular chain, and the metal ligand content is 5% of the double bond molar number in the rubber; Black and vulcanization bags were mixed, and the obtained mixed rubber was molded with a flat vulcanizer at 143°C according to the normal vulcanization time to obtain samples 7, 8 and 9;

[0042] (2) Using isoprene rubber as the matrix, using a double-roll mill to mix filler carbon black and vulcanization bags, the obtained mixed rubber was molded with a flat vulcanizer at 143° C. according to the normal vulcanization time to obtain Comparative Sample 3;

[0043] The content of each component is: rubber matrix 100phr, carbon black 50phr; vulcanization package: zinc o...

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Abstract

The invention discloses a high-damping rubber material and a preparation method thereof. The method comprises the following steps: carrying out a grafting reaction to introduce multiple hydrogen bond units or metal ligands to the molecular chain of rubber, adding a vulcanizing bag, blending the rubber and the vulcanizing bag to obtain a mixed compound, and carrying out hot press vulcanization to obtain the high-damping rubber material. The high-damping rubber material greatly improves the damping performance of a rubber material, and substantially improves the physical and mechanical performances of the rubber material. The method has the advantages of simple process, low cost, no extra processing devices or tedious steps, and important prospect in the preparation of damping engineering materials with high mechanical performances.

Description

technical field [0001] The invention relates to the modification of rubber, in particular to a high-damping rubber material prepared by constructing sacrificial bonds in rubber molecular chains and a preparation method thereof. Background technique [0002] As a functional material for reducing vibration and noise, damping materials are widely used in aerospace, mechanical engineering, construction and many other fields. Due to its unique viscoelastic properties, polymer materials, especially rubber materials, have excellent damping properties in the glass transition region, and are an important class of damping materials. However, the glass transition region of a single rubber matrix is ​​generally below room temperature and narrow, and the effective damping temperature range (the temperature range corresponding to tanδ≥0.3) is located in the temperature range below room temperature, resulting in poor damping effect. The key to preparing rubber materials with high damping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00C08L51/04C08K13/02C08K3/22C08K5/09C08K3/06C08C19/20C08C19/22C08C19/38C08C19/06C08F279/02C08F222/06C08F8/42
CPCC08C19/06C08C19/20C08C19/22C08C19/38C08F8/42C08F279/02C08K3/06C08K3/22C08K5/09C08K13/02C08K2003/2296C08L15/00C08L51/04
Inventor 唐征海郭宝春黄晶刘杰张旭辉
Owner SOUTH CHINA UNIV OF TECH
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