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Carboxy nitrile rubber high-performance damping material and method for producing the same

A carboxyl nitrile rubber and damping material technology, which is applied in the field of carboxy nitrile rubber-based high-performance damping materials and their preparation, can solve problems such as non-controllability, and achieve the effects of large loss factor and improved damping performance

Inactive Publication Date: 2008-05-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unfortunately, most of the glass transition region of rubber damping materials is a low temperature region below room temperature, which is often very narrow (usually 20-30°C around Tg) and cannot be adjusted. The application in the engineering field there are great limitations

Method used

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  • Carboxy nitrile rubber high-performance damping material and method for producing the same
  • Carboxy nitrile rubber high-performance damping material and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] With the formula carboxybutyl rubber (XNBR) as 70 parts by mass and hindered phenol antioxidant (AO-2246) as 30 parts by mass, a 1mm thin sheet sample was prepared strictly according to the above preparation method, and a dynamic mechanical analyzer (DMA- 7, Perkin Elmer) conducted dynamic mechanical tests on it. Test conditions: frequency 1Hz, temperature -50-100°C, heating rate 5°C / min, tensile mode, test results shown in Figure 1. It can be seen from Figure 1 that the peak loss factor of this material can reach 2.62, and the peak value is located at 3.9°C; the temperature range corresponding to tanδ≥0.3 is -7~67.2°C, that is, the effective damping temperature range can reach 74.2°C.

Embodiment 2

[0035] With the formulation of carboxybutyl rubber (XNBR) as 60 parts by mass and hindered phenol antioxidant (AO-2246) as 40 parts by mass, a 1mm thin sheet sample was prepared strictly according to the above preparation method, and a dynamic mechanical analyzer (DMA- 7, Perkin Elmer) conducted dynamic mechanical tests on it. Test conditions: frequency 1Hz, temperature -50-100°C, heating rate 5°C / min, tensile mode, test results shown in Figure 2. It can be seen from Figure 2 that the peak loss factor of this material can reach 3.14, and the peak value is located at 10.7°C; the temperature range corresponding to tanδ≥0.3 is -1.9~84.7°C, that is, the effective damping temperature range can reach 86.3°C.

Embodiment 3

[0037] With the formulation of carboxybutyl rubber (XNBR) as 50 parts by mass and hindered phenol antioxidant (AO-2246) as 50 parts by mass, a 1mm thin sheet sample was prepared strictly according to the above preparation method, and a dynamic mechanical analyzer (DMA- 7, Perkin Elmer) conducted dynamic mechanical tests on it. Test conditions: frequency 1Hz, temperature -50-100°C, heating rate 5°C / min, tensile mode, test results shown in Figure 3. It can be seen from Figure 3 that the peak loss factor of this material can reach 2.87, and the peak value is located at 17.4°C; the temperature range corresponding to tanδ≥0.3 is 4.9-91.8°C, that is, the effective damping temperature range can reach 86.7°C.

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Abstract

The invention relates to a carboxylated nitrile rubber-based high-performance damping material and a preparation method thereof. The material uses carboxylated nitrile rubber (XNBR) as a matrix and a hindered phenolic antioxidant 2,2'-methylene bis( 4-methyl-6-tert-butylphenol) is a damping additive obtained by blending and tableting; preparation: (1) Blending a certain proportion of carboxylated nitrile rubber and damping additives on a double-roller mixer Making a mixed film; (2) hot pressing the mixed film on a flat vulcanizing machine to obtain a thin sheet sample; (3) using a dynamic mechanical analyzer to perform a dynamic mechanical test on the sample to characterize its damping performance. The damping material of the present invention is characterized by a large loss factor, a wide effective damping temperature range, and the position of the damping peak can be regulated by adjusting the content of the damping additive, thereby obtaining a high-performance damping material suitable for use at different temperatures.

Description

technical field [0001] The invention belongs to the field of polymer damping materials, in particular to carboxylated nitrile rubber-based high-performance damping materials and a preparation method thereof. Background technique [0002] Polymer damping material is a new type of material newly developed. It uses the viscoelasticity of polymers to absorb vibration energy, and partially converts the absorbed mechanical energy or sound energy into heat energy and dissipates it, thereby reducing the vibration amplitude. Or reduce the effect of vibration energy. [0003] Polymer damping materials usually use their glass transition region as the functional region (generally engineering materials use the temperature range corresponding to tanδ≥0.3 as the effective damping temperature region), because the macromolecular chain segment can fully Movement, but can not completely keep up with the vibration frequency to produce molecular chain internal friction, so the hysteresis phenom...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08K5/13B29C35/02B29B7/00
Inventor 晏雄刘其霞庄兴民
Owner DONGHUA UNIV
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