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Hybrid dynamic polymer and application thereof

A technology of polymers and compounds, applied in the field of intelligent polymers, can solve the problems that the characteristics of dynamic reversible covalent bonds are difficult to be fully reflected, and achieve the effects of easy recycling and reuse, self-repair, and good processing performance

Pending Publication Date: 2018-07-31
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

The existence of situations such as this makes it difficult to fully reflect the characteristics of the dynamic reversible covalent bond itself under normal conditions, and it is necessary to develop a new type of dynamic polymer to solve the above-mentioned problems in the prior art

Method used

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  • Hybrid dynamic polymer and application thereof
  • Hybrid dynamic polymer and application thereof
  • Hybrid dynamic polymer and application thereof

Examples

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preparation example Construction

[0259] In the preparation process of hybrid dynamic polymers, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0260] 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 with the help of strong stirring during the preparation of the dynamic polymer to make it a uniform foam, and then through physical Or chemical changes make it gel and solidify to become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0261] Wherein, the physical foaming method is to utilize physical principles to realize the foaming of the polymer in the preparation process of the dynamic polymer, which generally includes the following four methods: (1) inert gas foaming method, that is, after adding Press the inert gas into the molten polymer or pasty material unde...

Embodiment 1

[0317]

[0318]Add 5g of diaminomethylphenylboronic acid compound into the three-necked flask (using 2-aminomethylphenylboronic acid and 1,6-hexamethylene diisocyanate as raw materials, controlling the molar ratio of the two to 2:1, and reacting at room temperature) , 30g polyol compound (a) (with propylene glycol, 2-methyl-2-propyl [3-(2-oxiranyl) propyl] carbamate as raw material, boron trifluoride ether as catalyst , through cationic ring-opening polymerization to synthesize a propylene oxide copolymer with a carbamate group in the side group; prepared by reaction), add 200ml of toluene solvent, heat to 60°C for stirring and dissolving, after mixing for 30min, then add 2ml of triethylamine dropwise, and continue to stir and react. The apparent viscosity of the polymer fluid is tested using a rotational viscometer, wherein the test temperature is 25°C and the shear rate is constant at 0.1s -1 , the apparent viscosity of the polymer fluid was measured to be 17,946 mPa·s. ...

Embodiment 2

[0320]

[0321] In the three-necked flask, add 30g of phenylboronic acid double-capped polytetrahydrofuran (using 4-aminophenylboronic acid as a raw material, and dibromo-capped polytetrahydrofuran with potassium carbonate as a catalyst to obtain through alkylation reaction), 3.8g of polytetrahydrofuran Alcohol compound (a) (using AIBN as the initiator and triethylamine as the catalyst, using 1,3,5-triacryloylhexahydro-1,3,5-triazine and quantitative N-[(2-mercapto Ethyl)carbamoyl]propionamide and 3-mercapto-1,2-propanediol are prepared by thiol-alkene click addition reaction), add a small amount of BHT antioxidant dropwise, heat to 120°C and mix and stir for 30min, Add a small amount of triethylamine dropwise, react for 3 hours under nitrogen protection, then pour the viscous reaction solution into a suitable mold, place it in a vacuum oven at 80°C for 24 hours for further reaction, then cool to room temperature and place it for 30 minutes, and finally The obtained polymer...

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Abstract

The invention discloses a hybrid dynamic polymer. The hybrid dynamic polymer comprises a cyclic organoborate bond produced by a reaction of an organoboric acid element with a diol element, and a supramolecular hydrogen bond formed under the condition of participation of a side hydrogen bond group, wherein the cyclic organoborate bond and the supramolecular hydrogen bond exist as polymeric chain joints and / or cross-linked chain joints for the dynamic polymer and are necessary conditions for the formation or maintenance of the structure of the dynamic polymer. Due to the dynamic reversibility ofthe cyclic organoborate bond and the supramolecular hydrogen bond, the dynamic polymer has self-repairing performance, reusability and recyclability; in addition, when the dynamic polymer of a specific formula receives an external force, the cyclic organoborate bond and the supramolecular hydrogen bond can be preferentially broken as sacrificial bonds, so the dynamic polymer presents good toughness. The dynamic polymer can be extensively used as a self-repairing material, a tough material, a sealing material, a sandwich adhesive, a force sensor, and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a hybrid dynamic polymer composed of dynamic reversible covalent bonds and supramolecular hydrogen bonds. Background technique [0002] Dynamic chemistry is an interdisciplinary subject developed by combining supramolecular chemistry and dynamic covalent chemistry in covalent chemistry. Traditional molecular chemistry focuses on stable covalent interactions, while dynamic chemistry focuses on some relatively weak non-covalent interactions and reversible covalent bonds. Among them, supramolecular chemistry is based on non-covalent intermolecular interactions. Compared with traditional covalent bonds, these non-covalent interactions have weaker bond energy and are greatly affected by thermodynamics. The formed supramolecular structure To some extent, it is not a kinetically stable system. For dynamic covalent chemistry, it has some characteristics similar to supramolecular che...

Claims

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Application Information

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IPC IPC(8): C08G65/337C08G65/334C08G81/00C08C19/20C08F8/42C08F210/06C08F236/08
CPCC08G65/337C08C19/20C08F8/42C08F210/06C08G65/3344C08G81/00C08F236/08
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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