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Hybrid crosslinked dynamic polymer

A hybrid cross-linking and polymer technology, applied in the field of smart polymers, can solve the problems of performance and application limitations, lack of dynamics, covalent interpenetrating network cannot be repaired, etc., to achieve high value, diverse performance, excellent circular effect

Active Publication Date: 2019-01-15
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

This kind of covalent interpenetrating network not only cannot be repaired after damage, but also lacks dynamics, which greatly limits its performance and application.

Method used

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Examples

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Effect test

preparation example Construction

[0137] In the preparation process of dynamic polymer, three methods are mainly used to foam the dynamic polymer: mechanical foaming method, physical foaming method and chemical foaming method.

[0138] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer by means of strong stirring during the preparation process of the dynamic polymer to make it a uniform foam, and then undergo physical Or chemical changes make it into a foam material. In order to shorten the molding cycle, air and emulsifiers or surfactants can be added.

[0139] Among them, the physical foaming method uses physical principles to achieve polymer foaming during the preparation of dynamic polymers. It generally includes but is not limited to the following methods: (1) Inert gas foaming method, namely Press the inert gas into the molten polymer or paste material under pressure, and then reduce the pressure and increase...

Embodiment 1

[0197] 21g of 5-vinylpyrimidine and 35g of acrylamide were mixed and dissolved in 200mL of toluene and then added to the No. 1 reactor. Then 2g of azobisisobutyronitrile (AIBN) was added. The temperature was raised to 95°C and the reaction was stirred for 6h. Then add 30g of toluene diisocyanate, continue to stir the reaction for 1h, remove the excess solvent, transfer the reactant to the wide-mouthed No. 2 reactor, add 100mL of dibutyl phthalate and 2mL 0.2 to the No. 2 reactor mol / L cupric chloride solution, continue to stir for 5 minutes after mixing uniformly, stop stirring, and maintain this state for 12 hours to obtain a dynamic polymer plasticizer swollen gel. Performance test: 90% compressive strength (MPa): 1.35±0.22; tensile strength (MPa): 2.14±0.37; elongation at break (%): 245.15±23.44. Under the action of tensile force, the synergistic effect between hydrogen bond and metal-ligand interaction improves the tensile strength and elongation at break of the dynamic pol...

Embodiment 2

[0199] Add 40g of 3-isocyanato-1-propene into the dry No. 1 reactor, add 0.5g of potassium persulfate (KPS) while stirring, increase the temperature to 80°C, stir and react for 4h, maintain this temperature while adding 40g while stirring The 5-(aminomethyl)-2-(1-pyrazolyl)pyridine, after continuing the reaction for 2h, add 11g of 1,4-diaminobutane, and after continuing the reaction for 1h, transfer the reactant to the wide-mouthed In the No. 2 reactor, add 100 mL 1-butyl-3-methylimidazole hexafluorophosphate ionic liquid, 2 mL 0.2mol / L nickel chloride solution, and 1 g graphene to the No. 2 reactor, and continue to stir for 5 min. After sonicating for 20 minutes and mixing uniformly, stop stirring. After maintaining this state for 12 hours, a dynamic polymer ionic liquid swollen gel is obtained. After pressing the surface of the sample with a finger, the sample can show good elasticity and can be stretched in a larger range. Make it into a dumbbell-shaped spline with a size o...

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Abstract

The invention discloses a hybrid crosslinked dynamic polymer, which contains metal-ligand interaction and covalent bond formed covalent crosslinking. Specifically, covalent crosslinking reaches the gel point of covalent crosslinking or above in at least one crosslinked network. The dynamic polymer combines the respective advantages of metal-ligand interaction and covalent crosslinking, and throughregulation of the reactant structure, polymer materials with abundant structures and diverse properties can be prepared. The dynamic reversibility of the metal-ligand interaction in the dynamic polymer enables the polymer to show stimulus response and other functional properties, and has self-repair, shape memory, toughening and other effects on the material in a specific structure. And covalentcrosslinking endows the polymer with certain strength and stability. The dynamic polymer can be widely applied as a self-repair material, ductile material, sealing material, shape memory material, force sensor material and the like.

Description

Technical field: [0001] The invention relates to the field of smart polymers, in particular to a hybrid cross-linking dynamic polymer composed of covalent bonds and metal-ligand interactions. Background technique: [0002] Traditional polymers are generally composed of covalent bonds. Because of their high bond energy, covalent bonds endow polymers with good stability and stress-carrying capacity. Cross-linking is a general method for polymers and other materials to form a three-dimensional network structure to obtain elastomers, thermosetting plastics, and improve the thermal stability and mechanical properties of polymers. Crosslinking can be chemical (covalent) crosslinking or physical (non-covalent / supramolecular) crosslinking. Chemical cross-linking is particularly helpful in improving the thermal stability, mechanical properties, dimensional stability, etc. of polymers, so it occupies a large proportion in the cross-linking of polymers. However, when only chemical covalen...

Claims

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Application Information

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IPC IPC(8): C09J175/04C08J11/06C08F8/32C08F8/30C08F20/00C08F220/56C08F226/06C08G18/62C08G18/76C08G18/48C08K3/22C08K3/08C08L33/00C08J9/228
CPCC09J175/04C08F8/32C08F220/56C08G18/4833C08G18/6216C08G18/6266C08G18/7614C08G18/7671C08J9/228C08J11/06C08K3/08C08K3/22C08J2205/06C08J2333/00C08K3/16C08K5/12C08K2003/2275C08K2201/011C08L2312/00C08F226/06C08F8/30C08F20/00C08L33/00Y02W30/62Y02P20/54
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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