Thermosetting shape-memory resin capable of memorizing multiple shapes, and preparation method thereof

A thermosetting and memory technology, applied in the application field of shape memory functionalization of high-performance resin-based composite materials, it can solve the problems of limited application scope and inability to achieve multi-stage deformation, and achieve high mechanical properties, high mechanical properties and temperature resistance. Effect

Active Publication Date: 2014-11-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current thermosetting shape memory resin can only memorize a single shape, and cannot realize multi-stage deformation

Method used

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  • Thermosetting shape-memory resin capable of memorizing multiple shapes, and preparation method thereof
  • Thermosetting shape-memory resin capable of memorizing multiple shapes, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In a three-necked flask equipped with mechanical stirring and a thermometer, add 1 mole of 4,4'bismaleimidodiphenylmethane and 0.5 mole of polyetheramine D400 into an appropriate amount of tetrahydrofuran, so that the polymer mass accounts for 20% of the total system mass. %, that is, the mass ratio of the total mass of bismaleimide and polyetheramine to tetrahydrofuran is 1:4, then stir and start heating to 65°C. After 24 hours of reaction, a homogeneous amber solution formed. Then the solution was cooled to room temperature, 0.5 mole of bisphenol A cyanate was added, and the stirring was accelerated until the bisphenol A cyanate was completely dissolved. The mixed solution is poured into a mold with a flat surface, placed in a vacuum oven, and vacuumed to remove air bubbles. After 5 minutes, the mold was taken out from the vacuum oven, and placed at room temperature to evaporate excess solvent in the solution. After 24 hours, put the mold in the oven, and make the r...

Embodiment 2

[0023] Add 1 mole of 4,4'bismaleimidodiphenylmethane and 1 mole of polyetheramine D400 into tetrahydrofuran in a three-necked flask equipped with mechanical stirring and a thermometer, so that the polymer mass accounts for 20% of the total system mass , then stir and begin heating to 65°C. After 24 hours of reaction, a homogeneous amber solution formed. Then the solution was cooled to room temperature, 1 mole of bisphenol A cyanate was added, and the stirring was accelerated until the bisphenol A cyanate was completely dissolved. The mixed solution is poured into a mold with a flat surface, placed in a vacuum oven, and vacuumed to remove air bubbles. After 5 minutes, the mold was taken out from the vacuum oven, and placed at room temperature to evaporate excess solvent in the solution. After 24 hours, put the mold in the oven, and make the resin fully react according to the curing conditions of 120°C / 0.5h, 150°C / 1h, 180°C / 1h, and 200°C / 2h. After the reaction is over, the ma...

Embodiment 3

[0025] Add 1 mole of 4,4'bismaleimidodiphenylmethane and 2 moles of polyetheramine D400 into tetrahydrofuran in a three-necked flask equipped with mechanical stirring and a thermometer, so that the polymer mass accounts for 20% of the total system mass , then stir and begin heating to 65°C. After 24 hours of reaction, a homogeneous amber solution formed. Then the solution was cooled to room temperature, 2 moles of bisphenol A cyanate was added, and the stirring was accelerated until the bisphenol A cyanate was completely dissolved. The mixed solution is poured into a mold with a flat surface, placed in a vacuum oven, and vacuumed to remove air bubbles. After 5 minutes, the mold was taken out from the vacuum oven, and placed at room temperature to evaporate excess solvent in the solution. After 24 hours, put the mold in the oven, and make the resin fully react according to the curing conditions of 120°C / 0.5h, 150°C / 1h, 180°C / 1h, and 200°C / 2h. After the reaction is over, the ...

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Abstract

The invention relates to a thermosetting shape-memory resin capable of memorizing multiple shapes, and a preparation method thereof. The method comprises the following steps: bismaleimide and polyether amine are mixed and dissolved in tetrahydrofuran; a reaction is allowed for 24h under a temperature of 65 DEG C; when the solution has an amber color, bisphenol A type cyanate is added; the mixture is fully and uniformly mixed; and resin casting body or shape-memory composite material preparation is carried out according to required process parameters. Polyether amine can be subjected to a reaction with bismaleimide resin monomer, such that a linear molecular framework can be formed, and can be adopted as a resin deformation and recovery reversible phase. Resin shape memory effect can be realized, and resin mechanical performance can be improved. With the existences of various cross-linked structures, the resin has a relatively wide glass transition temperature range, such that the function of resin system of memorizing different shapes under different temperatures can be realized. Also, high mechanical performance and temperature resistance level can be maintained.

Description

technical field [0001] The invention belongs to the technical field of shape-memory functional application of high-performance resin-based composite materials, and relates to a thermosetting shape-memory resin capable of memorizing various shapes and a preparation method thereof. Background technique [0002] Smart material is a kind of material that can change its shape, mechanical properties, phase separation, surface morphology, permeability, etc. , optical properties and electrical properties of stress-sensitive materials. Smart materials make materials adapt to the external environment by changing their own composition or structure. Today, with the rapid development of aerospace technology, materials have a great role in promoting the development of aircraft. In this case, smart materials, as "new materials in the 21st century", have broad development space and play a significant role in promoting the progress of human civilization and the improvement of living standa...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08L79/08C08K5/29C08G73/10
Inventor 冷劲松刘彦菊张启伟
Owner HARBIN INST OF TECH
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