Preparation method of a wide temperature range high damping rubber-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 Damping factor, effect of cell uniformity

Inactive Publication Date: 2016-03-30
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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 a wide temperature range high damping rubber-plastic blended foam material
  • Preparation method of a wide temperature range high damping rubber-plastic blended foam material
  • Preparation method of a wide temperature range high damping rubber-plastic blended foam material

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preparation example Construction

[0029] Aiming at the problems of low effective damping temperature range and poor sound insulation effect of high-damping rubber-plastic blended foam materials in the prior art, the present invention provides a method for preparing a wide-temperature range high-damping rubber-plastic blended foam material, which includes The following steps:

[0030] (1) The first stage mixing adopts an internal mixer, the initial temperature is set at 150-180℃, the rotor speed is 40-60r / min, polylactic acid is added first, and then ethylene-vinyl acetate rubber and silica 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. The rubber is discharged after timing and mixing for 10-20 minutes from the start of the addition of the ethylene-vinyl acetate. 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 parts by m...

Embodiment 1

[0047] Adopt HAAKE torque rheometer mixing chamber, initial temperature is set to 160℃, rotor speed is 50r / min, put 20 grams of PLA into the mixing chamber first, mix for 1 minute, add 80 grams of EVM700, mix For 1 minute, add 30 grams of white carbon black in two parts, then mix for 10 minutes and then discharge the rubber; then use a two-roll mill to add 2 grams of zinc oxide and 1 gram of stearin to one stage of the mixed rubber at room temperature. Acid, 4 grams of AC foaming agent, 6 grams of vulcanizing agent BIPB, thin pass 5 times to lower the sheet to prepare rubber compound a. After mixing rubber a is allowed to stand for 16 hours, use a plate vulcanizer to mold the vulcanization and foam, the mold pressure is 10MPa, the vulcanization and foaming temperature is 170℃, and the vulcanization and foaming time is 2 minutes. The effective damping temperature with uniform cells can be obtained. The range is 103℃ wide temperature range high damping blend material.

Embodiment 2

[0049] Adopt HAAKE torque rheometer mixing chamber, initial temperature is set to 160℃, rotor speed is 50r / min, put 30 grams of PLA into the mixing chamber first, mix for 1 minute, add 70 grams of EVM700, mix For 1 minute, add 40 grams of white carbon black in two times, then mix for 10 minutes, and then discharge the rubber; then use a two-roll mill, add 1 gram of zinc oxide and 0.5 gram of stearin to one stage of the mixed rubber at room temperature. Acid, 2 grams of AC foaming agent, 9 grams of BIPB vulcanizing agent, thin pass 8 times to produce the rubber compound a. After the rubber mixture a is allowed to stand for 8 hours, use a plate vulcanizer to mold the vulcanization and foam, the mold pressure is 10MPa, the vulcanization and foaming temperature is 170℃, and the vulcanization and foaming time is 3 minutes to obtain an effective damping temperature with uniform cells. The domain is 87℃ wide temperature range high damping blend material.

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Abstract

The invention discloses a preparation method of a rubber-plastic blended foaming material with wide temperature range and high damping, which comprises the following steps: firstly adding polylactic acid, and then adding ethylene-vinyl acetate rubber and white carbon by using an internal mixer for one-stage mixing Black mixing; the second-stage mixing adopts a double-roller open mill, and at room temperature, zinc oxide, stearic acid, foaming agent, and vulcanizing agent BIPB are sequentially added to the first-stage rubber mixture, and the next sheet is thinned to obtain a rubber mixture a; After the rubber compound a is left to stand for 8-16 hours, it is molded, vulcanized and foamed by a flat vulcanizer, and a wide temperature range high damping blend material with uniform cells can be obtained. The beneficial effects of the invention are: the damping temperature range can be effectively widened, the damping factor is improved, and the material prepared by the preparation method of the invention has uniform cells, smooth surface, beautiful appearance and excellent mechanical properties.

Description

technical field [0001] 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. Background technique [0002] 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. [0003] 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 spots in the research ...

Claims

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Application Information

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Patent Type & Authority Patents(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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