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Mercaptan epoxy elastomer material and preparation method and application thereof

An elastomer material, epoxy technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of difficult recycling or repair, difficult to prepare high thermal conductivity self-healing system, unable to reshape, etc. Self-healing performance, simple and easy preparation process, good recyclability

Inactive Publication Date: 2018-09-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its thermoset nature, once cured, it cannot be reshaped
Therefore, it is extremely difficult to recover or repair
It is difficult to prepare a self-healing system with high thermal conductivity based on epoxy-based polymers

Method used

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  • Mercaptan epoxy elastomer material and preparation method and application thereof
  • Mercaptan epoxy elastomer material and preparation method and application thereof
  • Mercaptan epoxy elastomer material and preparation method and application thereof

Examples

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preparation example Construction

[0033] The invention provides a kind of preparation method of mercaptan epoxy elastomer material, comprises the following steps:

[0034] Mix monomer I, monomer II, 1,5,7-triazabicyclo[4,4,0]dec-5-ene with an organic solvent, and undergo a thiol-epoxy nucleophilic ring-opening reaction to obtain Thiol epoxy elastomer material;

[0035] Wherein, the monomer I is:

[0036]

[0037] The monomer II is:

[0038]

[0039] In the present invention, unless otherwise specified, all raw materials are commercially available products or sources known to those skilled in the art.

[0040] In the present invention, the molar ratio of the mercapto groups in the monomer I to the epoxy groups in the monomer II is preferably 1:(0.9-1.1), more preferably 1:1.

[0041] In the present invention, the mass ratio of the monomer II to 1,5,7 triazabicyclo[4,4,0]dec-5-ene is preferably (40-50):1, more preferably ( 42-48):1, most preferably (44-46):1. In the present invention, the 1,5,7 triaza...

Embodiment 1

[0063] At 22°C, 2.0g (6.62mmol) trimethylolpropane triglycidyl ether (TMTGE), 2.65g (6.62mmol) trimethylolpropane tris (3-mercaptopropionate) (TMMP) and 46mg 1,5,7-Triazabicyclo[4,4,0]dec-5-ene (TBD) was mixed evenly, then 0.5mL absolute ethanol was added at a rate of 1ml / min, and the thiol- Epoxy nucleophilic ring-opening reaction to obtain thiol epoxy elastomer material;

[0064] The thiol epoxy elastomer material was hot-pressed at 180° C. and 10 MPa for 1 hour to obtain a thermally conductive self-healing material.

[0065] The thermal conductivity (λ) of the self-healing material is 0.2693W / mK (see Figure 4 ), glass transition temperature (T g ) is -23.50℃ (see Figure 6 ); Described self-healing material is measured its tensile strength according to ASTM D412 standard, and test result is 0.77MPa (see Figure 5 );

[0066] The self-healing material is subjected to tensile failure according to ASTM D412 conditions, and the self-healing material after tensile failure ...

Embodiment 2

[0068] At 25°C, 2.0g (6.62mmol) trimethylolpropane triglycidyl ether (TMPGE), 2.65g (6.62mmol) trimethylolpropane tris (3-mercaptopropionate) (TMPMP), 43mg 1,5,7-Triazabicyclo[4,4,0]dec-5-ene (TBD) and 0.235g micron boron nitride (mBN) were mixed evenly, and then added to 1mL at a rate of 1.5ml / min Absolute ethanol, 0.8min to complete the thiol-epoxy nucleophilic ring-opening reaction to obtain a thiol-epoxy elastomer material;

[0069] The thiol epoxy elastomer material was hot-pressed at 180°C and 8MPa for 1 hour to obtain a self-healing material;

[0070] The thermal conductivity (λ) of the self-healing material is 0.3485W / mK (see Figure 4 ), the glass transition temperature (Tg) is -20.33°C (see Figure 6 ); Described self-healing material is measured its tensile strength according to ASTM D412 standard, and test result is 1.88MPa (see Figure 5 );

[0071] The self-healing material is subjected to tensile failure according to ASTM D412 conditions, and the self-healin...

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Abstract

The invention provides a preparation method of a mercaptan epoxy elastomer material. The preparation method includes: mixing monomer I, monomer II, 1,5,7-triazabicyclo[4,4,0]dec-5-ene and an organic solvent, and performing mercaptan-epoxy nucleophilic ring opening reaction to obtain the mercaptan epoxy elastomer material. The prepared mercaptan epoxy elastomer material has the advantages that after the material is subjected to tensile fracture, the tensile strength of a material obtained after self-repairing can be kept to be 90% of that of the original material, and accordingly the mercaptanepoxy elastomer material is quite good in self-repairing performance and reusability; moreover, when the mercaptan epoxy elastomer material is composited with heat-conduction filler, the heat conductivity and thermal stability of the mercaptan epoxy elastomer material can be increased, and the reusability of the mercaptan epoxy elastomer material is guaranteed. In addition, the preparation methodis stable and efficient in reaction, simple in preparation process and easy in preparation operation.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a mercaptan epoxy elastomer material and its preparation method and application. Background technique [0002] Polymer materials are widely used in technical fields such as electronic appliances, aerospace and electronic packaging because of their excellent physical and mechanical properties, electrical insulation properties and processing properties. However, during the use of polymer materials, due to the influence of environmental factors such as heat and force, damage in the form of cracks and other forms will inevitably occur, thereby degrading the performance of polymer materials. [0003] The intrinsic self-healing system designs the structure of the polymer material itself so that it can undergo a reversible repair reaction under certain conditions. After the polymer material is damaged to a certain extent, it can regain the original original state by corresp...

Claims

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Application Information

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IPC IPC(8): C08G75/04C08L81/02C08K3/38C08K3/22C08K3/34C09K5/14
CPCC08G75/04C08K3/22C08K3/34C08K3/38C08K2003/2227C08K2003/385C08K2201/011C09K5/14C08L81/02
Inventor 杨旭彤顾军渭张秋禹郭永强马腾博
Owner NORTHWESTERN POLYTECHNICAL UNIV
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