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A kind of recyclable self-healing thermosetting polymer and preparation method thereof

A thermosetting and polymer technology, applied in the field of self-healing thermosetting polymers and their preparation, can solve the problems of many reaction by-products, cumbersome preparation process, thermosetting polymers do not have self-healing properties, etc., and achieves easy polymerization and selectivity. The effect of wide and excellent recyclability

Active Publication Date: 2022-06-17
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermosetting polymers prepared by it do not have self-healing properties
[0004] In addition, the preparation methods of boroxane-based polymers mostly adopt condensation polymerization or multi-step synthesis method, the preparation process is cumbersome, and there are many reaction by-products

Method used

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  • A kind of recyclable self-healing thermosetting polymer and preparation method thereof
  • A kind of recyclable self-healing thermosetting polymer and preparation method thereof
  • A kind of recyclable self-healing thermosetting polymer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A method for preparing a recyclable self-healing thermosetting polymer provided by a preferred embodiment of the present invention, the specific steps are as follows:

[0042] (1) 0.8g vinylbenzene boronic acid and 9.7g polyethylene glycol methacrylate were uniformly mixed in 35mL ethyl acetate, then 25mg initiator azobisisoheptonitrile was added, and stirred to obtain a mixed solution;

[0043] (2) The mixed solution was reacted in a water bath at 50°C for 12h under a nitrogen atmosphere;

[0044] (3) Pour the reacted solution into a mold (40mm×20mm×5mm) and dry it at 80°C for 24h, then place it in a vacuum drying oven at 70°C and heat until the solvent is completely evaporated.

Embodiment 2

[0046] A method for preparing a recyclable self-healing thermosetting polymer provided by a preferred embodiment of the present invention, the specific steps are as follows:

[0047] (1) uniformly mix 1.9g propenyl phenylboronic acid and 11.25g polyethylene glycol acrylate in 50mL ethanol, then add 40mg initiator azobisisobutyronitrile, and stir to obtain a mixed solution;

[0048] (2) The mixed solution was reacted in a water bath at 60°C for 18h under a nitrogen atmosphere;

[0049](3) Pour the reacted solution into a mold (40mm×20mm×5mm), and dry it at 70°C for 24h, then place it in a vacuum drying oven at 60°C and heat until the solvent evaporates completely.

Embodiment 3

[0051] A method for preparing a recyclable self-healing thermosetting polymer provided by a preferred embodiment of the present invention, the specific steps are as follows:

[0052] (1) Mix 3.4g of vinylbenzene boronic acid and 23.2g of polypropylene glycol acrylate in 55mL of N,N-dimethylethylenediamine uniformly, then add 80mg of initiator azobisisoheptonitrile, and stir to obtain a mixture solution;

[0053] (2) The mixed solution was reacted in a water bath at 55°C for 24h under a nitrogen atmosphere;

[0054] (3) Pour the reacted solution into a mold (40mm×20mm×5mm), and dry it at 100°C for 24h, then place it in a vacuum drying oven at 80°C and heat until the solvent evaporates completely.

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Abstract

The invention discloses a recyclable self-healing thermosetting polymer and a preparation method thereof. The steps of the preparation method are as follows: S1. Dissolving a double bond-containing phenylboronic acid compound, a double bond-containing monomer and an initiator in an organic solvent and stir evenly to obtain a mixed solution; S2. the mixed solution obtained in S1 is subjected to a one-pot free radical polymerization method to obtain a random copolymer containing phenylboronic acid; S3. the solvent in the random copolymer obtained in S2 is evaporated, and crosslinking is solidified, namely have to. The preparation method of the present invention has the advantages of many types of monomers, few by-products, easy polymerization, controllable reaction conditions, adjustable type, structure and performance of thermosetting polymers synthesized; the prepared thermosetting polymers have self-repairing, high Strength, recyclability, strong adhesion, etc., have good application prospects.

Description

technical field [0001] The invention belongs to the technical field of macromolecular thermosetting polymers, and in particular relates to a recyclable self-healing thermosetting polymer and a preparation method thereof. Background technique [0002] Thermosetting polymers have the advantages of high strength, high stability and thermal stability due to their internal chemical cross-linking structure, and have important applications in various fields such as electronic devices, mechanical parts, construction and aerospace materials. However, due to the irreversibility of its internal chemical cross-linking, traditional thermosetting polymers cannot be self-healing and cannot be recycled, which greatly limits their service life and does not utilize the concept of sustainable development. The research on new recyclable self-healing thermosetting polymers is of great significance and has attracted more and more attention in recent years. [0003] Currently, in order to prepare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/28C08F230/06
CPCC08F220/28
Inventor 武元鹏杨茜罗平亚安鹏
Owner SOUTHWEST PETROLEUM UNIV