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High-intensity heat reversible polytriazole adhesive, and preparation and application thereof

A polytriazole and adhesive technology, applied in the direction of adhesives, etc., can solve the problems of storage mode and storage time limitation, adhesives do not have reversible bonding, and do not have reversible bonding, so as to achieve physical and chemical changes and bonding that are not easy The effect of flexible and diverse morphology and reversible adhesion-debonding ability

Active Publication Date: 2017-09-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned patent technology, there are a large number of crosslinkable groups in both the hot melt type and the solution type, and the storage period is limited, and the crosslinking of the adhesive disclosed in the above patent is irreversible covalent crosslinking, which does not have reversible adhesive properties. connection characteristics
[0010] To sum up, in the existing patented technologies, some adhesives do not have the characteristics of reversible bonding, and although some adhesives have certain reversible bonding properties, they still have a large number of crosslinkable groups themselves, and their storage The method and storage time are severely limited, which also greatly restricts its industrial application

Method used

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  • High-intensity heat reversible polytriazole adhesive, and preparation and application thereof
  • High-intensity heat reversible polytriazole adhesive, and preparation and application thereof
  • High-intensity heat reversible polytriazole adhesive, and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Preparation and application of polytriazole film

[0059] In a four-neck round bottom flask equipped with mechanical stirring, nitrogen inlet, condenser and thermometer, 91 parts by weight of bisphenol A dipropargyl ether, 53 parts by weight of 1,4-bis(azidomethyl)benzene and 25 parts by weight of 1,10-dibromodecane were added to 254 parts by weight of N,N-dimethylacetamide (DMAC), mechanically stirred at a stirring speed of 100 rpm, the reaction temperature was 120°C, and the reaction time was 1 h, to obtain Light brown homogeneous polytriazole prepolymer liquid.

[0060] Coat the above-mentioned polytriazole prepolymer solution on a glass plate with a smooth surface, treat it at 70°C / 3h, 160°C / 3h, and cool down to room temperature. The glass plate was soaked in deionized water for 36 hours, so that the adhesive film was automatically peeled off from the glass plate, and dried to obtain a polytriazole adhesive film, which was light yellow and transparent, and had a th...

Embodiment 2

[0065] Preparation and application of polytriazole film

[0066] In a four-neck round bottom flask equipped with mechanical stirring, nitrogen inlet, condenser and thermometer, 82 parts by weight of 1,4-bis(2-(2-propynyloxy)ethoxy)benzene, 65 parts by weight Parts of 4,4-diazidediphenylmethane and 13 parts by weight of 1,2-dichloroethane are added to 107 parts by weight of N-methylpyrrolidone (NMP), mechanically stirred, stirring speed 100rpm, and the reaction temperature is 140 °C, the reaction time is 20min, and a light brown homogeneous polytriazole prepolymer liquid is obtained.

[0067] Coat the above-mentioned polytriazole pre-polymerization solution on a smooth stainless steel plate, and after 100°C / 2h, 170°C / 2h treatment, cool down to room temperature. The stainless steel plate was soaked in deionized water for 24 hours, so that the adhesive film was automatically peeled off from the stainless steel plate, and dried to obtain a polytriazole adhesive film, which was li...

Embodiment 3

[0070] Preparation and application of polytriazole film

[0071] In a four-neck round bottom flask equipped with mechanical stirring, nitrogen inlet, condenser and thermometer, 38 parts by weight of 1,4-diethynylbenzene, 45 parts by weight of 1,3-bis(azidomethyl)benzene and 23 parts by weight of 1,2-dibromoethane were added to 105 parts by weight of N,N-dimethylformamide, mechanically stirred at a stirring speed of 100 rpm, the reaction temperature was 130°C, and the reaction time was 40 minutes to obtain light brown uniform Phase polymerization triazole prepolymer solution.

[0072] Coat the above-mentioned polytriazole pre-polymerization solution on a smooth polytetrafluoroethylene plate, and after 90°C / 2.5h, 150°C / 4h treatment, cool down to room temperature. The polytetrafluoroethylene plate was soaked in deionized water for 24 hours, so that the adhesive film was automatically peeled off from the polytetrafluoroethylene plate, and dried to obtain a polytriazole adhesive f...

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Abstract

The invention relates to a high-intensity heat reversible polytriazole adhesive, and preparation and application thereof. The adhesive is prepared from polytriazole polymers. The chemical structure general formula of the polytriazole polymers is shown as (I) in the specification; during the preparation of a polytriazole adhesive film, diyne monomers, diazido monomers and dihalo cross linking agents are simultaneously added into an organic solvent; stirring and mixing are performed; a base plate is coated with the materials; heat insulation is performed for 1 to 5h at 50 to 100 DEG C; then, the temperature is raised to 120 to 180 DEG C; heat insulation is performed for 1 to 8h; the materials are cooled to the room temperature; then, the base plate is soaked into de-ionized water, so that the adhesive film is automatically peeled from the base plate; drying is performed. During the preparation of the polytriazole adhesive, diyne monomers, diazido monomers and dihalo cross linking agents are mixed; the temperature is raised to 50 to 100 DEG C; sufficient stirring is performed for uniform mixing. Compared with the prior art, the adhesive has the advantages that the initial bonding intensity is high; the reversible bonding performance is good; the construction process is simple and convenient; the storage stability is high; the adhesive is applicable to application fields requiring high bonding intensity, repeated bonding and adjustable bonding.

Description

technical field [0001] The invention belongs to the technical field of novel adhesive materials, and relates to a high-strength thermally reversible polytriazole adhesive and its preparation and application. Background technique [0002] Adhesives, as a large class of polymer materials, have the characteristics of convenient use, wide application range, and high economic benefits, and play a very important role in modern economy, modern national defense, and modern science and technology. [0003] In order to obtain excellent bonding performance and properties such as solvent resistance and creep resistance during use, the adhesive is generally a cross-linked polymer. These crosslinks are generally irreversible covalent crosslinks, which can bring excellent properties such as high bonding strength to the adhesive, which is one of the reasons why the adhesive can be widely used. However, these irreversible crosslinks also make the adhesive not have the ability to actively re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J179/06C08G73/08
CPCC08G73/08C09J179/06
Inventor 唐均坤黄发荣袁荞龙万里强
Owner EAST CHINA UNIV OF SCI & TECH