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Fiber-reinforced rubber elastomer composite material and preparation method thereof

A rubber elastic body and composite material technology, applied in the field of composite materials, can solve problems such as high viscosity, fiber interruption, and limited material compression resistance

Active Publication Date: 2021-05-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of rubber, the fiber is severely interrupted during processing, and the interface bonding strength between rubber and fiber is weak, which severely limits the improvement of the compression resistance of the material, especially for low surface energy silicone rubber.

Method used

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  • Fiber-reinforced rubber elastomer composite material and preparation method thereof
  • Fiber-reinforced rubber elastomer composite material and preparation method thereof
  • Fiber-reinforced rubber elastomer composite material and preparation method thereof

Examples

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preparation example Construction

[0046] The preparation method of the thermosetting solder comprises the following steps: mixing a thermosetting resin, a curing agent and an accelerator, and mixing them uniformly with a stirrer to obtain the thermosetting solder. The viscosity of the thermosetting solder can be adjusted by means of constant temperature heating (less than 90° C.). The longer the constant temperature time is, the greater the viscosity will be (after the constant temperature time is over, the temperature will be cooled by an ice-water bath immediately).

[0047] The rubber matrix is ​​a vulcanized thermosetting rubber, and a vulcanizing agent needs to be added during vulcanization. The mass ratio of the vulcanizing agent to the thermosetting rubber is 0.1-5%, preferably 1%, 3%, or 5%. In addition, the rubber matrix may be liquid or solid, with a viscosity of 0.1-100000 Pa.s, preferably 1-2000 Pa.s.

[0048] Described thermosetting rubber is conventional rubber, comprises solid rubber and liquid ...

Embodiment 1

[0062] Vinyl silicone rubber SR-1 (viscosity of 50rad / s at room temperature is 1370Pa.s), vulcanizing agent dicumyl peroxide (content is 1% of the quality of silicone rubber) and glass fiber GF-KH560 (surface ring Oxygen group) into the internal mixer, blending at room temperature for 1min, adding epoxy resin EP (EP consists of E-51 resin (brand YD128) and curing agent methyl hexahydrophthalic anhydride, accelerator 2,4,6 -Tris(dimethylaminomethyl)phenol composition, the mass ratio of E-51 resin, curing agent methyl hexahydrophthalic anhydride, accelerator 2,4,6-tris(dimethylaminomethyl)phenol is 100: 70:5.), after continuing to blend for 10 minutes, take out the sample. Firstly, it is cured at a temperature of 100°C for 30 minutes; then it is vulcanized at a temperature of 150°C for 30 minutes, and two-step compression molding is performed to obtain a fiber-reinforced rubber elastomer composite material. The mass ratio of SR-1, epoxy resin EP and GF-KH560 is 80 / 20 / 30. The v...

Embodiment 2

[0064] The mass ratio of SR-1, EP and GF-KH560 is 80 / 20 / 20, and others are the same as in Example 1. The maximum compressive strength of the obtained fiber-reinforced rubber-elastomer composite is 1.95MPa, and the corresponding compressive strain is 9.6%, specifically The results are shown in Table 1.

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Abstract

The invention discloses a fiber-reinforced rubber elastomer composite material with good compression resistance, which comprises a rubber matrix, fibers and a thermosetting welding agent, and the thermosetting welding agent can promote the fibers randomly dispersed in the rubber matrix to be spontaneously welded together in the processing process. A three-dimensional network skeleton structure which is formed by the thermosetting welding agent and the fibers and is independent of the rubber matrix is substantially formed. The thermosetting welding agent is various thermosetting resins, is a flowing liquid before being cured at normal temperature, and is a high-strength solid after being cured. The thermosetting resin is prepared from thermosetting resin, a curing agent and an accelerant according to the mass ratio of 100:(50-100):(0-10). By adding the thermosetting welding agent, a self-welding fiber skeleton structure is formed in the rubber matrix, a supporting effect on the rubber matrix is achieved, the compression resistance of the rubber matrix is greatly improved, and the application range of rubber under the pressure-resistant condition is widened.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a fiber-reinforced rubber elastic body composite material and a preparation method thereof. Background technique [0002] As we all know, rubber elastomer, as a highly elastic material, is widely used in aerospace, transportation, medical equipment and other fields. However, with the continuous improvement of structure-function integration requirements, higher requirements are put forward for the strength and compression resistance of rubber. For example, rubber is used in underwater sound-absorbing coatings due to its characteristic acoustic impedance close to that of water and its excellent sound-absorbing performance. However, the water pressure of 5 MPa will deform the rubber, thereby greatly reducing its sound-absorbing performance. Therefore, how to improve the compression resistance of rubber is the key to broaden the application range of functiona...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L23/22C08L9/06C08L63/02C08L83/06C08K9/06C08K7/14C08K5/14C08J5/08
CPCC08J5/08C08J2309/06C08J2323/22C08J2383/07C08J2463/02C08J2483/06C08K5/14C08K7/14C08K9/06
Inventor 吴国章倪敏杰林宇
Owner EAST CHINA UNIV OF SCI & TECH
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