Preparation method of wide-temperature-range and high-damping rubber and plastic blended foam material

A technology of foaming materials and high damping, which is applied in the field of preparation of rubber-plastic blended foaming materials with wide temperature range and high damping, can solve the problems of not combining its own viscoelasticity with porous structure, so as to broaden the damping temperature range and improve Excellent damping factor and mechanical properties

Inactive Publication Date: 2014-07-30
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] At present, the preparation methods of polymer damping materials at home and abroad are mainly through blending or adding small organic molecules, or foaming of a single polymer, which only uses the viscoelasticity of the material itself to achieve damping, or achieves damping through foaming. Synergistic damping is achieved without combining its own viscoelasticity with the porous structure

Method used

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  • Preparation method of wide-temperature-range and high-damping rubber and plastic blended foam material
  • Preparation method of wide-temperature-range and high-damping rubber and plastic blended foam material
  • Preparation method of wide-temperature-range and high-damping rubber and plastic blended foam material

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preparation example Construction

[0034] Aiming at the problems of low effective damping temperature range and poor sound insulation effect of high-damping rubber-plastic blended foaming materials in the prior art, the present invention provides a preparation method of wide-temperature-range high-damping rubber-plastic blended foaming materials, including Follow the steps below:

[0035] (1) Internal mixer is used for the first stage of mixing, the initial temperature is set at 150-180°C, the rotor speed is 40-60r / min, polylactic acid is added first, and then ethylene-vinyl acetate rubber and white carbon black are mixed. Refining, the mass fraction ratio is 10-40 parts of polylactic acid: 60-90 parts of ethylene-vinyl acetate: 20-80 parts of white carbon black, timing and mixing for 10-20 minutes from the time of adding materials, and then discharging glue, the ethylene- The vinyl acetate content of vinyl acetate rubber is 70%; the second-stage mixing adopts a double-roll mill, and at room temperature, 1-4 pa...

Embodiment 1

[0054] HAAKE torque rheometer is used in the internal mixing room, the initial temperature is set at 160°C, the rotor speed is 50r / min, 20 grams of PLA is first put into the internal mixing room, mixed for 1 minute, 80 grams of EVM700 is added, and mixed 1 minute, add 30 grams of white carbon black in two parts, and then knead for 10 minutes to remove the glue; then use a double-roller open mill to add 2 grams of zinc oxide and 1 gram of stearin to the mixed rubber at room temperature. Acid, 4 grams of AC foaming agent, 6 grams of vulcanizing agent BIPB, thin pass 5 times of tableting, made the rubber compound a. After the mixed rubber a was left to stand for 16 hours, it was vulcanized and foamed with a flat vulcanizer. The mold pressure was 10 MPa, the vulcanization and foaming temperature was 170°C, and the vulcanization and foaming time was 2 minutes. The effective damping temperature with uniform cells can be obtained. Wide temperature range high damping blend material wi...

Embodiment 2

[0057] HAAKE torque rheometer is used in the internal mixing room, the initial temperature is set at 160°C, the rotor speed is 50r / min, 30 grams of PLA is first put into the internal mixing room, mixed for 1 minute, 70 grams of EVM700 is added, and mixed 1 minute, add 40 grams of white carbon black in two parts, and then knead for 10 minutes to remove the glue; then use a double-roller mill to add 1 gram of zinc oxide and 0.5 gram of stearin to a section of mixed rubber at room temperature. Acid, 2 grams of AC foaming agent, 9 grams of BIPB vulcanizing agent, thin pass 8 times of tableting, made rubber compound a. After the mixed rubber a was left to stand for 8 hours, it was vulcanized and foamed with a flat vulcanizer. The mold pressure was 10 MPa, the vulcanization and foaming temperature was 170°C, and the vulcanization and foaming time was 3 minutes. Wide temperature range high damping blend material with a temperature range of 87°C.

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Abstract

The invention discloses a preparation method of a wide-temperature-range and high-damping rubber and plastic blended foam material. The preparation method comprises the following steps of carrying out first-stage mixing by using an internal mixer, adding polylactic acid firstly, then, adding ethylene-polyvinyl acetate rubber and white carbon black, and mixing; carrying out second-stage mixing by using a two-roll mixing mill, sequentially adding zinc oxide, stearic acid, a foaming agent and a vulcanizing agent BIPB into a first-stage rubber compound at normal temperature, thinning and batching off to prepare a rubber compound a; standing the rubber compound a for 8-16h, then, molding, vulcanizing and foaming by using a plate vulcanizing machine to prepare a wide-temperature-range and high-damping blended material with uniform foam holes. The preparation method has the beneficial effects of effectively widening the damping temperature range and increasing damping factors; and in addition, the material prepared by using the preparation method disclosed by the invention is uniform in foam holes, smooth in surface, attractive in appearance and excellent in mechanical performance.

Description

[0001] technical field [0002] The invention relates to a preparation method of a high-damping rubber-plastic blended foaming material, in particular to a preparation method of a wide-temperature-range high-damping rubber-plastic blended foaming material. [0003] Background technique [0004] Damping material is a kind of vibration-reducing and noise-reducing material developed in recent years. It is a new type of functional material that can convert vibration energy and sound energy into heat energy and dissipate it. Become a hot spot at home and abroad. [0005] The root cause of the damping effect of polymer materials is its unique viscoelastic properties, which cause hysteresis and mechanical loss under the action of alternating cyclic stress. Due to its small density and elastic modulus, rubber damping materials are easy to bond with metal substrates, and can effectively control vibration and noise. At present, rubber damping materials have become one of the hot spo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L31/04C08L67/04C08K13/02C08K3/36C08K3/22C08K5/09C08J9/10B29C44/00B29B7/00
Inventor 史新妍贾凌雁
Owner QINGDAO UNIV OF SCI & TECH
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