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Dynamic polymer with hybrid cross-linked network and application of dynamic polymer

A hybrid cross-linking and polymer technology, applied in the field of dynamic polymers, can solve the problems of difficult bond breaking, non-recycling and recycling, and achieve good stability

Active Publication Date: 2018-02-16
厦门逍扬运动科技有限公司
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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-linked network and application of dynamic polymer
  • Dynamic polymer with hybrid cross-linked network and application of dynamic polymer
  • Dynamic polymer with hybrid cross-linked network and application of dynamic polymer

Examples

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preparation example Construction

[0196] 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

[0249] 1,3-Diglycidyl ether glycerol and methyl isocyanate are mixed at a molar ratio of 1:1, and reacted in dichloromethane under the catalysis of dibutyltin dilaurate to obtain a diepoxide with a carbamate group in the side group. ethane.

[0250] Trans-1,4-cyclohexanedicarboxylic acid and the above-mentioned dioxirane containing carbamate groups in the side group are mixed according to the molar ratio of 1:1, and 5mol% Zn(OAc) is added 2 As a bond exchange reaction catalyst, a dynamic polymer containing side hydrogen bond groups and binding exchangeable ester bonds is prepared.

[0251] The prepared product also has good plasticity, and can be placed in molds of different shapes according to actual needs, and a certain stress can be applied slightly under certain temperature conditions to form polymer products of different shapes according to the mold. It can be used as a gasket material.

Embodiment 2

[0253] Bicyclo[2,2,2]octane-1,4-cyclohexanedicarboxylic acid and SOCl 2 Mix according to the molar ratio of 1:2 and react in DMF to obtain bicyclo[2,2,2]octane-1,4-cyclohexanedioyl chloride.

[0254] Pentaerythritol and butyl isocyanate are mixed at a molar ratio of 1:1, and reacted in dichloromethane under the catalysis of dibutyltin dilaurate to obtain a trihydric alcohol compound with a carbamate group in the side group.

[0255]Bicyclo[2,2,2]octane-1,4-cyclohexanedioyl chloride and the above-mentioned trihydric alcohol compound containing carbamate group in the side group are mixed according to the molar ratio of 1:1, and 6mol% 2-MI and 5mol%Zn(acac) 2 , reacted in dichloromethane to prepare a dynamic polymer containing pendant hydrogen bond groups and associative exchangeable ester linkages.

[0256] The polymer sample has certain strength and compressibility, and can be stretched within a certain range. Stress is applied to the section of the broken sample (in this pr...

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Abstract

The invention discloses a dynamic polymer with a hybrid cross-linked network structure. The dynamic polymer contains dynamic covalent bond crosslinking and supermolecular hydrogen bond crosslinking, wherein the dynamic covalent bond crosslinking is realized by associative exchangeable covalent bonds, and the supermolecular hydrogen bond crosslinking is realized by hydrogen bond groups on the sidegroups and / or side chains of a polymer chain framework and hydrogen bond groups on the optional chain frameworks. The polymer integrates dynamic characteristics of a supermolecule and dynamic covalentcharacteristics of glass-like matter; supermolecular hydrogen bonds give stimulative responsibility, energy dissipation performance and self-repairing performance to the material; the associative exchangeable covalent bonds give structural stability and mechanical strength to the covalent cross-linked polymer, and because the associative exchangeable covalent bonds have dynamic reversibility, thepolymer has self-repairing performance, recycling performance, reproducibility and the like. According to the invention, the dynamic polymer with the hybrid cross-linked network structure can be widely applied to vibration-absorptive cushioning materials, impact-resistant protective materials, self-repairing materials, toughness materials, sealing elements and the like.

Description

technical field [0001] The invention relates to a dynamic polymer of a hybrid cross-linking network, in particular to a dynamic polymer of dynamic covalent cross-linking with exchangeable covalent bonds and supramolecular hydrogen bond cross-linking and its application. 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 propertie...

Claims

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Application Information

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IPC IPC(8): C08G63/685C08G63/688C08G75/045C08G18/66C08G18/46C08G18/32C08F220/28C08F226/06C08F222/26C08F226/02C08F220/56C08F222/38
CPCC08F220/28C08F220/281C08F220/56C08F226/02C08G18/3206C08G18/4623C08G18/4669C08G18/6677C08G63/6856C08G63/6886C08G75/045C08F222/385C08F226/06C08F222/26C08G63/685C08J3/24
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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