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Method for preparing polymer-based damping composite material capable of being designed into alternate laminar structure

A damping composite material and composite material technology are applied in the field of preparation of polymer damping composite materials, which can solve the problems of difficulty in forming a dual-continuous phase structure, difficult phase morphology, and poor damping effect, and achieve excellent damping performance and high damping factor. , the effect of wide effective damping range

Inactive Publication Date: 2009-05-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The purpose of the present invention is to provide a method for preparing damping composite materials with alternating layered structure in view of the present situation of preparing polymer damping composite materials, so as to solve the problem that the polymer blend damping materials prepared in the prior art are difficult to form bicontinuous phase structure, phase Difficult design and control of shape, poor damping effect and other technical problems

Method used

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  • Method for preparing polymer-based damping composite material capable of being designed into alternate laminar structure
  • Method for preparing polymer-based damping composite material capable of being designed into alternate laminar structure

Examples

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Embodiment 1

[0037] The two polymer materials are chlorinated butyl rubber compound and EPDM rubber compound respectively, which are respectively put into two extruders of the micro-layer co-extrusion device, and the speed ratio of the extruders is 1:1. The temperature of each section of the extruder is controlled between 80 and 90°C. The temperature of the converging unit C, the split unit D and the exit die E are all about 90°C. Using 5 split units, the material extruded from the die There are 64 layers, which are then vulcanized at about 170°C for about 15 minutes to obtain a chlorobutyl rubber / EPDM rubber damping composite. The damping factor of this material is 1.12, the effective damping range is -55~-10°C, and a new damping peak appears between 10°C and 20°C, the tensile strength is 15MPa, and the elongation at break is 850%. As a comparison, the damping factor of the damping material prepared by the traditional method is 0.82, the effective damping range is -47 to -22°C, the tensil...

Embodiment 2

[0039] The two polymer materials are butyl rubber compound and EPDM compound, which are put into two extruders of the micro-layer co-extrusion device respectively. The extruder speed ratio is 1:2. The temperature of each section of the machine is controlled between 80 and 90°C. The temperatures of the converging unit C, the stacking unit D and the outlet die E are all about 90°C. Using 4 stacking units, a 32-layer material is prepared, and then in Vulcanize at about 170°C for about 15 minutes to obtain a butyl rubber / EPDM rubber damping composite material. The material has a damping factor of 0.95, an effective damping range of -53 to -16.5° C., a tensile strength of 13.6 MPa, and an elongation at break of 800%.

Embodiment 3

[0041] The two polymer materials are petroleum resin-filled chlorinated butyl rubber compound and EPDM rubber compound respectively, and the weight content of petroleum resin in the chlorinated butyl rubber is 20%. The two materials are respectively put into the two extruders of the micro-layer co-extrusion device. The extruder speed ratio is 2:1. The temperatures of D and exit die E are both about 90°C. Using 3 stacked units, a 16-layer material is prepared, and then vulcanized at about 170°C for about 15 minutes to obtain petroleum resin filled chlorobutyl rubber / three Ethylene propylene rubber damping compound. The damping factor of this material is 1.23, and the effective damping range is -47~10℃

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Abstract

The invention discloses a method for preparing a polymer base damping composite material, the structure of which can be designed like an alternating layer, comprising the steps as follows: two polymer materials are respectively put into two extruding machines of a microbedding coextrusion device to be fused and plasticized, the two fused mass are laminated into two layers at a merging device, after the cutting and laminating of a splitting device comprising n splitting units, the composite material with 2<(n+1)> layers can be obtained. The two polymers distribute like alternating layers along the extrusion direction, the number of layers and the ratio of layers and thickness are respectively determined by the number of the splitting units and the rotating speed ratio of the extruding machine, so that the structure of the composite material has designability. Compared with the traditional preparation method, the polymer base damping composite material prepared by the invention has the characteristics of high damping factor, wide effective damping temperature zone and high elongation at break. The devices used in the invention are easily available, the raw material is commercially available without compounding other chemicals, in addition, the operation is simple, the production cost is low, and the efficiency is high.

Description

1. Technical field [0001] The invention relates to the field of polymer processing, and more specifically, the invention relates to a method for preparing polymer damping composite materials. 2. Background technology [0002] The vibration and noise generated by mechanical operation not only pollute the environment, but also affect the machining accuracy and product quality of the machine, accelerate the fatigue damage of the mechanical structure, shorten the service life of the machine, and reduce the mechanical vibration and noise damping by increasing the energy loss of the material Research has always been a hot spot at home and abroad. Now, many new materials and technologies have been continuously applied to damping and shock absorption, and polymer damping and shock absorption materials have attracted more and more attention because of their excellent performance. The use of polymer damping materials can greatly reduce mechanical noise and vibration, improve work eff...

Claims

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Application Information

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IPC IPC(8): B29C47/12B29C47/92B29C47/06B29C47/56B29K507/04B29K505/00B29K509/08B29K7/00B29K19/00B29K55/00B29K75/00B29K67/00B29K69/00B29C48/30B29C48/92
Inventor 李姜郭少云张玉清戴莹莹蒋松霖
Owner SICHUAN UNIV
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