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A kind of preparation method and application of thermosetting epoxy resin shape memory polymer

A memory polymer and epoxy resin technology, applied in the field of intelligent polymer materials, can solve the problem of insufficient toughness of epoxy resin, and achieve the effects of good reaction, high efficiency and good chemical stability

Active Publication Date: 2021-08-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems caused by insufficient toughness of epoxy resin without affecting other properties of the product, and to prepare a shape memory polymer with good comprehensive performance and sufficient toughness and strength to meet the requirements of On-site engineering needs

Method used

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  • A kind of preparation method and application of thermosetting epoxy resin shape memory polymer
  • A kind of preparation method and application of thermosetting epoxy resin shape memory polymer
  • A kind of preparation method and application of thermosetting epoxy resin shape memory polymer

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Mix 6g of epoxy resin E51, 1g of thiocyanuric acid and 0.02g of catalyst 2-methylimidazole, and stir for 30min under vacuum. Pour the uniformly stirred mixture into a polytetrafluoroethylene mold, and place it under vacuum conditions, react at 80°C for 3h, at 120°C for 2h, and at 150°C for 1h, and after 24h of natural cooling, a thermosetting epoxy resin was prepared. Resin shape memory polymer material.

[0046]The prepared thermosetting epoxy resin shape memory polymer material sample is deformed at a temperature of 51°C + 10°C, and then cooled to 25°C, the shape can be fixed into a temporary shape, and then placed at 51°C, the sample can be deformed again Return to the original shape.

Embodiment 2

[0048] Mix 6g of epoxy resin E51, 2g of thiocyanuric acid and 0.02g of catalyst 2-methylimidazole, and stir for 30min under vacuum. Pour the uniformly stirred mixture into a polytetrafluoroethylene mold, and place it under vacuum conditions, react at 80°C for 3h, at 120°C for 2h, and at 150°C for 1h, and after 24h of natural cooling, a thermosetting epoxy resin was prepared. Resin shape memory polymer materials (such as figure 1 a).

[0049] The prepared thermosetting epoxy resin shape memory polymer material sample is deformed at a temperature of 62°C+10°C, and then cooled to 25°C, the shape can be fixed into a temporary shape (such as figure 1 b), and then put it at 62°C and the sample can return to its original shape (such as figure 2 ).

Embodiment 3

[0051] Mix 6g of epoxy resin E51, 3g of thiocyanuric acid and 0.02g of catalyst 2-methylimidazole, and stir for 30min under vacuum. Pour the uniformly stirred mixture into a polytetrafluoroethylene mold, and place it under vacuum conditions, react at 80°C for 3h, at 120°C for 2h, and at 150°C for 1h, and after 24h of natural cooling, a thermosetting epoxy resin was prepared. Resin shape memory polymer material.

[0052] The prepared thermosetting epoxy resin shape memory polymer material sample is deformed at a temperature of 70°C + 10°C, and then cooled to 25°C, the shape can be fixed into a temporary shape, and then placed at 70°C, the sample can be deformed again Return to the original shape.

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Abstract

The invention discloses a preparation method and application of a thermosetting epoxy resin shape memory polymer. The method comprises the steps of reacting epoxy resin, thiocyanic acid and a basic catalyst under vacuum conditions at 80 DEG C to 150 DEG C; followed by natural cooling to obtain a thermosetting epoxy resin shape memory polymer. The invention also provides a preparation method of a thermosetting epoxy resin shape-memory polymer material and a shape-memory restoration method. The thermosetting epoxy resin shape-memory polymer prepared by the method of the invention has good chemical stability and thermal stability, exhibits good shape-memory effect when its glass transition temperature is above its glass transition temperature, and has good mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of intelligent polymer materials, and in particular relates to a preparation method and application of thermosetting epoxy resin shape memory polymer memory. Background technique [0002] Shape memory polymer (SMP) is a new type of polymer material. Its unique shape memory effect has been sought after by many industry researchers, and it has emerged in aviation, medical, electronics, construction and other fields. However, epoxy resin has limited its application range due to its own brittleness, low elongation at break and insufficient tensile strength. At the same time, due to the shortcomings of insufficient toughness, the epoxy resin shape memory polymer is more prone to fracture during the process of completing large-angle deformation, which affects the continued use of its material. [0003] At present, the more commonly used method to improve the toughness of epoxy resin system is to use toughening ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/66C08G59/68C08L63/00C08L63/02
CPCC08G59/66C08G59/68C08L63/00C08L2201/12
Inventor 王彦玲汤龙皓李强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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