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Dynamic polymer with hybrid cross-linking network

A hybrid cross-linking and polymer technology, applied in the field of smart materials, can solve problems such as non-recycling and recycling, difficulty in bond breaking, etc., and achieve rich environmental responsiveness, good dynamic effects, and excellent self-healing effects

Active Publication Date: 2019-04-23
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since thermosetting materials are cross-linked by covalent bonds, as long as the polymerization reaction is completed, it will be very difficult to break the bonds, and the properties of the materials will also be fixed.
Therefore, traditional thermosetting materials cannot be recovered and recycled

Method used

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  • Dynamic polymer with hybrid cross-linking network
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  • Dynamic polymer with hybrid cross-linking network

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preparation example Construction

[0170] The preparation method of a kind of dynamic polymer ionic liquid gel of the present invention preferably comprises the following steps: the raw material of the dynamic polymer that prepares hybrid cross-linked network is added in ionic liquid, makes the prepared hybrid cross-linked network The mass fraction of the dynamic polymer is 0.5-50%. The covalent cross-linking is carried out by the appropriate means, and after the reaction is completed, it is naturally cooled to form a dynamic polymer gel. The ionic liquids mentioned above are generally composed of organic cations and inorganic anions. The cations are usually alkyl quaternary ammonium ions, alkyl quaternary ions, 1,3-dialkyl substituted imidazolium ions, N-alkyl substituted pyridinium ions, etc. ; Anions are usually halide ions, tetrafluoroborate ions, hexafluorophosphate ions, and CF 3 SO 3 - , (CF3SO 2 ) 2 N - 、C 3 f 7 COO - 、C 4 f 9 SO 3 - 、CF 3 COO - , (CF 3 SO 2 ) 3 C - , (C 2 f 5 SO 2 ...

Embodiment 1

[0222] 3-allyl-1,2-phenylenediamine and 4-mercapto-2-pyrrolidone were mixed according to a molar ratio of 1:1, and 0.2wt% of photoinitiator benzoin dimethyl ether (DMPA) was added, and after stirring fully, put The compound 1a was prepared by ultraviolet irradiation in an ultraviolet crosslinking apparatus for 4 h.

[0223]

[0224] Weigh the reaction material A in parts by weight: 12 parts of N,N'-di-tert-butylethylenediamine, 4 parts of compound 1a, 0.3 parts of 1,6-hexanediol, 0.3 parts of tris(3-aminoethyl) Amine, 0.2 parts of dibutyltin dilaurate, 0.2 parts of triethylenediamine, 0.1 parts of silicone oil, 5 parts of methylene chloride, and 3 parts of water were added to the container, and the Stir evenly under the same conditions; Reaction material B: 12 ​​parts of 1,4-cyclohexane diisocyanate, add to the container, and stir evenly under the condition of material temperature 35°C and stirring speed 200r / min; then the reaction material A and the reaction material B is...

Embodiment 2

[0228] Tris(3-aminoethyl)amine and ethyl isocyanate were mixed according to equimolar ratio, dissolved in 200mL of dichloromethane, and then 0.1 part of dibutyltin dilaurate and 0.1 part of triethylenetetramine were added as catalyst to prepare band Urea-based diamine compound 2a.

[0229]

[0230] Weigh the reaction material A in parts by weight: 15 parts of N,N'-di-tert-butyldecanediamine, 6 parts of compound 2a, 0.5 parts of 1,6-hexanediol, 0.1 part of glycerol, 0.2 parts of dilaurel Add dibutyltin dibutyltin, 0.2 parts of triethylenediamine, 0.1 parts of silicone oil, 5 parts of dichloromethane, and 3 parts of water into the container, and stir evenly at a material temperature of 35°C and a stirring speed of 200r / min; Material B: 12 ​​parts of hexamethylene diisocyanate, added to the container, stirred evenly under the condition of a material temperature of 35°C and a stirring speed of 200r / min; then the reaction material A and the reaction material B were mixed accordi...

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Abstract

The invention discloses a dynamic polymer with a hybrid cross-linking network, wherein the dynamic polymer contains dynamic covalent cross-linking and supramolecular hydrogen bond cross-linking, the dynamic covalent cross-linking network skeleton chain at least comprises a dynamic covalent bond induced based on steric effect, and the side hydrogen bond group and / or the terminal hydrogen bond groupparticipates in the formation of the hydrogen bond contained in the supramolecular hydrogen bond cross-linking. According to the present invention, the polymer integrates the supramolecular dynamic properties and the glass-like dynamic covalent properties, wherein the supramolecular hydrogen bond can make the material have stimulating responsiveness and self-healing property, and the dynamic covalent bond induced based on steric effect can make the dynamic polymer have the structural stability and the mechanical strength, and further has dynamic reversibility, such that the polymer can have characteristics of self-healing property, recyclability, repeatable processability and the like, and can be widely used as self-healing materials, toughness materials, sealing materials, interlayer adhesives and the like.

Description

technical field [0001] The invention relates to the field of smart materials, in particular to a dynamic polymer with a hybrid crosslinking network comprising dynamic reversible covalent bonds and supramolecular hydrogen bonds. Background technique [0002] Traditional thermoplastic polymer materials are non-crosslinked polymers that can flow and deform when heated, and can maintain a certain shape after cooling. Most thermoplastic polymer materials have the properties of repeated heating softening and cooling hardening within a certain temperature range, and are easy to carry out molding processes such as extrusion, injection, blow molding and welding. Therefore, thermoplastic materials are reprocessable and recyclable. But on the other hand, a large number of thermoplastic polymer materials are also prone to creep due to their non-crosslinked structures, resulting in poor structural stability and very limited mechanical properties. The mechanical properties of materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J9/30C08J9/32
CPCC08J3/24C08J9/30C08J9/32C08J2375/04C08J2375/02
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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