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A kind of liquid rubber system dynamic crosslinking agent and its application

A liquid rubber and cross-linking agent technology, applied in the field of polymer material modification, can solve the problems of expensive raw materials, few applications, difficult practical application of materials, etc., and achieve the effect of improving bending strength, impact strength, and good repeated processing characteristics.

Active Publication Date: 2021-06-01
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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  • A kind of liquid rubber system dynamic crosslinking agent and its application
  • A kind of liquid rubber system dynamic crosslinking agent and its application
  • A kind of liquid rubber system dynamic crosslinking agent and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Synthesis of liquid rubber-based dynamic crosslinking agent DTRB:

[0028] Concrete reaction equation is as follows:

[0029]

[0030] The specific implementation steps are as follows: in a round bottom flask, add 25g of bromo-terminated polybutadiene, 20g of anhydrous potassium carbonate, and then add 300mL of anhydrous chloroform as a solvent. Simultaneously, configure 10 mL of a solution of 2-methylaminophenylboronic acid (3 g) with anhydrous chloroform, and add this solution dropwise to a chloroform solution of dibromopentaethylene glycol. React for 24 hours. The product was concentrated by rotary evaporator and purified by reverse phase chromatography. The yield is higher than 68%. The corresponding NMR data of the product are as follows: 1H NMR (500MHz, CD 3 OD): δ7.72, 7.26, 7.21, 5.63, 4.13, 3.67, 3.21, 1.93. 13CNMR (125MHz, CD 3 OD): δ: 135.6, 129.6, 127.4, 53.2, 29.8, 27.3.

Embodiment 2

[0032] (1) Preparation of reversible dynamic cross-linked polyamide masterbatch:

[0033] In this embodiment, the liquid rubber-based dynamic crosslinking agent DTRB prepared in Example 1 is used as a typical dynamic crosslinking agent for description:

[0034] Mix 2% antioxidant system (antioxidant 1010:antioxidant 168=1:2) into 5kg polyamide 6 and stir evenly; add 1kg of the above-mentioned liquid rubber-based dynamic crosslinking agent DTC7 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.

[0035] (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...

Embodiment 3

[0039] The preparation of embodiment 3 reversible cross-linked polyamide 66:

[0040] (1) Preparation of reversible dynamic cross-linked polyamide masterbatch:

[0041] In this embodiment, the liquid rubber-based dynamic crosslinking agent DTRB prepared in Example 1 is used as a typical dynamic crosslinking agent for description:

[0042] Mix 2% antioxidant system (antioxidant 1010:antioxidant 168=1:2) into 1kg polyamide 66 and stir evenly; add 0.2kg of the liquid rubber-based dynamic crosslinking agent 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.

[0043] (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 mi...

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Abstract

The invention discloses a liquid rubber-based dynamic cross-linking agent and its application. Its structural formula is: the liquid rubber-based dynamic cross-linking agent of the present invention can generate hydrogen bonds through its phenylboronic acid and the active wave hydrogen of secondary ammonia in the amide group Effectively realize the dynamic cross-linking process of polymer materials.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, and in particular relates to a liquid rubber-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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/55C08L77/02C08L77/06C08L79/08
CPCC08K5/55C08L77/02C08L77/06C08L79/08C08L2312/00
Inventor 钱浩张莹雪林志勇王缸荣
Owner HUAQIAO UNIVERSITY