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Ether-based dynamic cross-linking agent and application thereof

A cross-linking agent and dynamic technology, which is applied in the field of polymer material modification, can solve the problems of less application, expensive raw materials, and low mechanical properties of materials, and achieve the effects of improving tensile strength, mechanical properties, and impact strength

Inactive Publication Date: 2019-10-08
HUAQIAO UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been reported that reversible dynamic cross-linked polymer materials have disadvantages such as cumbersome preparation process of dynamic small molecules, expensive raw materials, and low mechanical properties of materials, which make the practical application of materials difficult, and are mainly concentrated in hydrogel systems. , less used in the field of polymer resin

Method used

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  • Ether-based dynamic cross-linking agent and application thereof
  • Ether-based dynamic cross-linking agent and application thereof
  • Ether-based dynamic cross-linking agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Ether dynamic crosslinking agent DTCO5

[0028] Synthesis of ((5,8,11,14,17-pentaoxa-2,20-diazahenicosane-2,20-diy1)bis(2,1-phenylene))diboronic acid)):

[0029] Concrete reaction equation is as follows:

[0030]

[0031] The specific implementation steps are as follows: in a round bottom flask, add 3.51g of dibromopentaethylene glycol, 12.6g of anhydrous potassium carbonate, and then add 300mL of anhydrous chloroform as a solvent. At the same time, 10 mL of a solution of aminophenylboronic acid (3 g) was prepared with anhydrous chloroform, and this solution was added dropwise to a chloroform solution of dibromopentaethylene glycol, and reacted at 40 degrees Celsius for 16 hours under the protection of argon. The product was concentrated by rotary evaporator and purified by reverse phase chromatography. The yield is higher than 85%. The corresponding NMR data of the product are as follows: 1H NMR (500MHz, CD 3 OD): δ7.67, 7.24, 6.92, 6.84, 4.86, 4.53, 3.78, 2.84....

Embodiment 2

[0033] (1) Preparation of reversible dynamic cross-linked polyamide masterbatch:

[0034] In this example, the ether dynamic crosslinking agent DTCO5 prepared in Example 1 is described as a typical dynamic crosslinking agent:

[0035] Mix 2% of the antioxidant system (antioxidant 1010:antioxidant 168=1:2) into 1 kg of polyamide 6, and stir evenly; add 0.2 kg of the above-mentioned ether-based dynamic cross-linking agent DTCO5 into a high-speed mixer, and Under the conditions, the mixture is fully mixed for 30 minutes to obtain a mixture; the mixture is melted, mixed and granulated in a twin-screw extruder to obtain a dynamic crosslinking agent masterbatch, and the melting temperature is controlled below 280°C.

[0036] (2) Preparation of reversibly crosslinked polyamide 6: in 5kg polyamide 6, add more than 1kg of dynamic crosslinking agent masterbatch, fully disperse in a high-speed mixer, and then extrude and granulate in a twin-screw extruder ( The melting temperature is co...

Embodiment 3

[0040] The preparation of embodiment 3 reversible cross-linked polyamide 66:

[0041] (1) Preparation of reversible dynamic cross-linked polyamide masterbatch:

[0042] In this example, the ether dynamic crosslinking agent DTCO5 prepared in Example 1 is described as a typical dynamic crosslinking agent:

[0043] Mix 2% of the antioxidant system (antioxidant 1010:antioxidant 168=1:2) into 1kg polyamide 66, and stir evenly; add 0.2kg of the ether-based dynamic cross-linking agent DTCO5 into a high-speed mixer, and Under the conditions, the mixture is fully mixed for 30 minutes to obtain a mixture; the mixture is melt-mixed and granulated in a twin-screw extruder to obtain a dynamic crosslinking agent masterbatch, and the melting temperature is controlled below 300°C.

[0044] (2) Preparation of reversibly cross-linked polyamide 66: in 5 kg polyamide 66, add 1 kg of the above-mentioned dynamic cross-linking agent masterbatch, fully disperse in a high-speed mixer, and then extrud...

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Abstract

The invention discloses an ether-based dynamic cross-linking agent and an application thereof. The ether-based dynamic cross-linking agent has a structural formula shown in the description. The ether-based dynamic cross-linking agent provided by the invention can generate hydrogen-bond interaction by phenylboronic acid and reactive hydrogen of secondary amine in an amide group, and effectively realize a dynamic crosslinking process for a polymer material.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, and in particular relates to an ether-based dynamic crosslinking agent and its application. Background technique [0002] Polymers and their composite materials have excellent characteristics such as low density, high specific strength and specific modulus, and good toughness, and are widely used in various fields of the national economy. However, with the development of social economy, higher performance requirements are put forward for materials. Therefore, effectively and fully improving the performance of materials has become a key issue in the research of polymer materials. [0003] The interpenetrating network structure refers to a polymer network formed by two or more polymers interpenetrating with each other. The interaction between different polymer networks is not connected by chemical bonds, but by chain entanglement and non-covalent bond interactions. It is an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/55C08L77/06C08L77/02C08J3/22
CPCC08J3/226C08J2477/02C08J2477/06C08K5/55
Inventor 钱浩张莹雪林志勇王缸荣
Owner HUAQIAO UNIVERSITY