Interlocking network crosslinking polymer based on reversible covalent bond as well as preparation method and application thereof

A cross-linked polymer and network cross-linking technology, which is applied in the field of interlocking network cross-linked polymers and its preparation, can solve the problems of reducing or not being able to maximize the "forced compatibility" effect and mechanical properties of network interpenetration , to achieve the effect of simple and easy preparation method, easy composition and performance

Active Publication Date: 2018-12-21
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects in the prior art that IPN or double-network polymers are prone to phase separation during the stretching process, which leads to the inability to maximize the "forced compatibility" effect and the reduction of mechanical properties brought about by network interpenetration. and deficiencies, providing a cross-linked polymer based on an interlocking network of reversible covalent bonds

Method used

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  • Interlocking network crosslinking polymer based on reversible covalent bond as well as preparation method and application thereof
  • Interlocking network crosslinking polymer based on reversible covalent bond as well as preparation method and application thereof
  • Interlocking network crosslinking polymer based on reversible covalent bond as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Example 1 intermediate containing reversible DA bond cross-linked network D: ED900-DA

[0089] This example provides a cross-linked network D: ED900-DA containing reversible DA bonds. The synthesis steps are as follows: 16g of glycidyl furfuryl ether and 18.81g of N,N''-(4,4''-methylenebis Phenyl)bismaleimide was dissolved in 150mL tetrahydrofuran, added to a round-bottomed three-neck flask equipped with a condensation device, a nitrogen protection device, and a mechanical stirring device, reacted at 70°C for 24h, cooled to room temperature, and distilled under reduced pressure After removing the solvent, a yellow viscous liquid was obtained. Adopt silica gel chromatographic column to purify, eluent is dichloromethane / methanol=50:1, collect corresponding eluent and distill under reduced pressure and remove solvent to obtain white powdery solid product, product structural formula is shown in the following formula, and the nuclear magnetic spectrum of product sees Figure...

Embodiment 2

[0091] Example 2 The intermediate contains a dynamic reversible C-ON bond cross-linked network C: 4-CON

[0092] This example provides a cross-linked network C: 4-CON containing dynamic reversible C-ON bonds, the synthesis process is as follows: 5g 4-OH-TEMPO and 8.37g 2,2'- azo -N-(2-Hydroxyethyl)propionamide] was dissolved in 150mL of dimethylformamide, added to a round-bottomed three-neck flask equipped with a condensation device, a nitrogen protection device, and a mechanical stirring device, and reacted at 120°C for 3h After cooling to room temperature, the solvent was distilled off under reduced pressure to obtain a yellow viscous liquid. Purified by silica gel chromatography, the eluent is petroleum ether / ethyl acetate=5:3 and pure ethyl acetate in turn, the corresponding eluent is collected and evaporated under reduced pressure to remove the solvent to obtain a colorless oily liquid product, the product structure is shown in the following formula , the H NMR spectrum ...

Embodiment 3

[0094] Embodiment 3 interlocking network CD-13

[0095] This example provides an interlocking network CD-13, which consists of 25 parts of a cross-linked network C: 4-CON containing a dynamic reversible C-ON bond (provided in Example 2) and 75 parts of a cross-linked network containing a reversible DA bond D: ED900-DA (provided in Example 1), prepared by mixing after dissociation.

[0096] Preparation of interlocking network CD-13: take 7.5g of the product ED900-DA obtained in Example 1, put it in 150ml of dimethylformamide after crushing, fully swell for 24 hours, and then add it to the In a three-necked round-bottomed flask with a mechanical stirring device, stir at 130°C for 30 minutes to obtain a transparent solution. Take 2.5 g of the product 4-CON obtained in Example 2, put it in 50 ml of dimethylformamide after crushing, fully swell for 24 hours, and then add it to a round-bottomed three-neck flask equipped with a condensation device, a nitrogen protection device, and ...

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Abstract

The invention relates to an interlocking network crosslinking polymer based on a reversible covalent bond as well as a preparation method and application thereof. The interlocking network crosslinkingpolymer is prepared from the following components in parts by weight: 25 to 75 parts of a crosslinking polymer C containing a dynamic reversible C-ON bond and 25 to 75 parts of a crosslinking polymerD containing a reversible DA bond. According to the interlocking network crosslinking polymer provided by the invention, the crosslinking polymers containing two types of temperature response type reversible covalent bonds, which have no mutual interference, are disaggregated, mixed and recombined to obtain the crosslinking polymer with a self-adaptive property and an interlocking structure; interlocking of molecule levels can be realized by sufficiently utilizing an effect of limiting phase separation of a network, and a forced compatibility effect of the interlocking structure is sufficiently expressed; mechanical properties are relatively great improved and the tensile strength is remarkably improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an interlocking network cross-linked polymer based on reversible covalent bonds and its preparation method and application. Background technique [0002] Interpenetrating Polymer Network (IPN) refers to a polymer network formed by two or more polymers interpenetrating with each other. The interaction between different polymer networks is not chemical bond connection, but mechanical entanglement. This kind of entanglement can play the role of forced compatibilization, increase interfacial affinity, and realize the complementary properties of different components, which is an effective method for polymer material modification. Dual-Network polymer (Dual-Network, DN) is a special IPN polymer, which introduces the concept of sacrificial bond (Sacrifice bond) into the IPN system, and is often used to prepare hydrogel materials with high toughness and high compressive stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24
CPCC08J3/24
Inventor 犹阳章明秋容敏智
Owner SUN YAT SEN UNIV
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