High-performance dynamic cross-linked polymer based on vinyl hydrazide bond and preparation method

A dynamic cross-linking and vinyl acyl technology, applied in the field of polymer materials, can solve the problems of complex and difficult application of self-healing material preparation process, difficulty in mass production, and difficulty in obtaining synthetic raw materials, etc., to achieve reduced mechanical properties and excellent mechanical properties. Properties, Effect of High Young's Modulus

Active Publication Date: 2021-10-12
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: At present, self-healing materials are faced with complex preparation process and difficult application, and synthetic raw materials are difficult to obtain and expensive, and it is difficult to realize mass production

Method used

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  • High-performance dynamic cross-linked polymer based on vinyl hydrazide bond and preparation method
  • High-performance dynamic cross-linked polymer based on vinyl hydrazide bond and preparation method
  • High-performance dynamic cross-linked polymer based on vinyl hydrazide bond and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of high-performance reversible dynamic linear polymers containing vinylhydrazide linkages. Dissolve 4.18g of acetoacetate-esterified PTMEG-250 (PT250-AA) in 20ml of DMF solvent, stir well, then add 1.9419g of isophthalic hydrazide (IPDH), react in an oil bath at 60°C for 2h After the reaction is complete, the solution is light yellow, vacuum-dried in an oven at 60°C for 24 hours, and dried in an oven at 70°C for 48 hours. After removing the solvent, a cross-linked polymer material containing vinyl hydrazide bonds can be obtained.

[0033]

Embodiment 2

[0035] Preparation of polyether-type high-performance reversible dynamic cross-linked polymers containing vinyl hydrazide linkages. Dissolve 4.18g of acetoacetified PTMEG-250 (PT250-AA) and 2.5759g of cross-linking agent triacetoacetoxymethylpropane (TMPAA) in 20ml of DMF solvent, stir well, then add 3.8838g of m-benzene Diformyl hydrazide (IPDH), reacted in an oil bath at 60°C for 2h, the solution was light yellow after the reaction was complete, vacuum dried in a 60°C oven for 24h, and vacuum dried in a 70°C oven for 48h, and the solvent containing Cross-linked polymer material of vinyl hydrazide linkages.

Embodiment 3

[0037] Preparation of high-performance reversibly dynamically crosslinked polymers containing vinylhydrazide linkages. Dissolve 1.5253g 1,4-bis(hydroxymethyl)cyclohexane diacetoacetate (CDM-AA) and 0.3145g crosslinker triacetoacetoxymethylpropane (TMPAA) in 10ml DMF solvent, stir well Finally, add 1.1853g of isophthalic hydrazide (IPDH) and react in an oil bath at 60°C for 2 hours. After the reaction is complete, the solution turns light yellow. Vacuum dry in an oven at 60°C for 24 hours, and dry in an oven at 70°C for 48 hours. , after removing the solvent, the cross-linked polymer material containing vinyl hydrazide bonds can be obtained.

[0038]

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Abstract

The invention relates to the field of polymer materials, and relates to a high-performance dynamic crosslinked polymer based on vinyl hydrazide bonds and a preparation method thereof. The ratio of raw materials is: 5-50 parts of diacetoacetate-based monomers, two 5-50 parts of hydrazide monomer, 10-80 parts of acetoacetated polyester or acetoacetated polyether polyol monomer or amino-terminated polyether monomer, and 0.1-50 parts of crosslinking agent. The raw material monomer involved in the present invention has a simple structure, is easy to obtain, and has an easy synthesis process and is extremely easy to prepare in batches. The material has excellent mechanical properties, self-healing properties as well as recyclability and thermal stability.

Description

technical field [0001] The invention relates to the field of polymer materials, and relates to a high-performance reversible covalent crosslinked polymer based on vinyl hydrazide bonds and a preparation method thereof. Background technique [0002] With the continuous development of society, more and more polymers and their composite materials are used in various industries, such as plastics and rubber. This is due to its light weight, easy processing and molding, good weather resistance and other advantages that promote the development and application of polymer materials. However, most of the polymer materials actually put into use are cross-linked thermosetting polymers. Although the cross-linked structure endows polymer materials with excellent mechanical properties, thermal stability and good dimensional stability, it is difficult to Recycling causes great waste and puts enormous pressure on the environment. [0003] In response to the above problems, scientists have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/08C08J3/24C08L79/06
CPCC08G73/08C08J3/24C08J2379/06
Inventor 夏和生王硕杨茂雨王占华
Owner SICHUAN UNIV
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