A room temperature repairable polymer damping material and its preparation method and application

A technology of damping materials and polymers, which is applied in the field of polymer damping materials and its preparation, can solve the problems of impracticable and limited material applications, and achieve the effects of high-efficiency repair performance, good transparency, and excellent remodeling performance

Active Publication Date: 2021-01-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not possible to repair the tiny cracks generated inside the material and prevent the final damage of the material
At the same time, the need for stimuli such as light and heat also limits the application of materials in some extreme conditions.

Method used

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  • A room temperature repairable polymer damping material and its preparation method and application
  • A room temperature repairable polymer damping material and its preparation method and application
  • A room temperature repairable polymer damping material and its preparation method and application

Examples

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preparation example Construction

[0049] The present invention provides a method for preparing a polymer damping material that can be repaired at room temperature described in the above technical solution, comprising the following steps:

[0050] Mix polyol, isocyanate and solvent for polycondensation reaction to obtain polyurethane;

[0051] The polyurethane, the chain-extending cross-linking agent and the solvent are mixed to carry out a cross-linking reaction to obtain a polymer damping material that can be repaired at room temperature.

[0052] The invention mixes polypolyol, isocyanate and solvent to carry out polycondensation reaction to obtain polyurethane.

[0053] In the present invention, the order of mixing the polypolyol, isocyanate and solvent is preferably to mix the polypolyol and the solvent for the first time to obtain a polypolyol solution; to mix the isocyanate and the solvent for the second time to obtain an isocyanate solution; Under bath conditions, the isocyanate solution is added dropw...

Embodiment 1

[0070] Preparation of polymer damping materials that can be repaired at room temperature, the preparation route is as follows:

[0071]

[0072] Wherein, the short wavy line in formula I represents the molecular chain of polypropylene glycol, and the long wavy line in formula II represents the molecular chain of the knot structure in formula I.

[0073] Amino-terminated polypropylene glycol (4 g) with a molecular weight of 400 was dissolved in 30 mL of ultra-dry N,N'-dimethylacetamide (DMAc), stirred at room temperature (25°C) for 10 min, and then cooled in an ice bath. Stir until the system temperature is <5°C to obtain a polypropylene glycol solution; dissolve isophorone diisocyanate (IPDI, 6mmol) in DMAc (10mL) to obtain an isocyanate solution; add the isocyanate solution dropwise at a constant speed of 2 drops / second Into the polypropylene glycol solution, react at room temperature for 24h to obtain polyurethane;

[0074] Dissolve trimesaldehyde (8mmol) in DMAc (10mL) ...

Embodiment 2

[0084]Dissolve hydroxyl-terminated polypropylene glycol with a molecular weight of 1000 (2 g) and hydroxyl-terminated polypropylene glycol with a molecular weight of 800 (8 g) in 80 mL of ultra-dry N,N'-dimethylacetamide (DMAc) at room temperature (25 °C ) under the condition of stirring for 10min, and then stirring under the condition of ice bath until the system temperature was <5°C to obtain a polypropylene glycol solution; dissolving isophorone diisocyanate (IPDI, 3mmol) and diphenylmethane diisocyanate (MDI, 7mmol) In DMAc (10mL), an isocyanate solution was obtained; the isocyanate solution was added dropwise to the polypropylene glycol solution at a constant rate of 2 drops / second, and 3 drops of dibutyltin dilaurate were added dropwise to the resulting reaction system. Reaction 24h, obtains polyurethane;

[0085] Dissolve trimesaldehyde (8mmol) in DMAc (10mL) solution, add the obtained trimesaldehyde solution dropwise to the polyurethane system, react at 80°C for 24h, t...

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Abstract

The invention provides a polymer damping material capable of being repaired at room temperature and a preparation method and application thereof, and belongs to the technical field of polymer materials. The polymer damping material capable of being repaired at room temperature is prepared from the following preparation raw materials: polyhydric alcohol, isocyanate, a chain extension cross-linkingagent and a solvent. The polyhydric alcohol comprises amino-terminated polyhydric alcohol or hydroxyl-terminated polyhydric alcohol, a molar ratio of the polyhydric alcohol to the isocyanate is (1.1-1.3): 1, and the crosslinking degree of the polymer damping material capable of being repaired at room temperature is 5-30%. The polymer damping material capable of being repaired at room temperature is high in transparency and excellent in mechanical property, spontaneous wound repair can be carried out at the room temperature after mechanical damage, the safety and durability of the material aregreatly improved, the service life of the material is greatly prolonged, and a good damping effect is achieved at the room temperature. Meanwhile, the damping material can be reshaped and recycled when being seriously damaged.

Description

technical field [0001] The invention relates to the technical field of polymer materials that can be repaired at room temperature, in particular to a polymer damping material that can be repaired at room temperature and its preparation method and application. Background technique [0002] With the development of modern industry, vibrating tools and high-power machinery that generate strong vibration are increasing, and the vibration hazards caused by various mechanical equipment during operation and work are becoming more and more serious: (1) In daily life, this type of vibration and noise will have adverse effects on people's life, work and physical health, such as hearing loss, sleep disturbance, and disease induction; (2) In the field of engineering, the broadband random excitation caused by vibration and noise will The multi-resonant peak response directly affects the normal operation of electronic devices, instruments and meters, and can cause disastrous consequences i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/50C08G18/66C08G18/48C08G18/32C08J3/24C08L75/08C08K5/07
CPCC08G18/3228C08G18/3855C08G18/4808C08G18/4825C08G18/4833C08G18/4854C08G18/5024C08G18/6685C08G2350/00C08J3/24C08J2375/08C08K5/07
Inventor 张凌石振康静
Owner JILIN UNIV
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