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Method for preparing photic driving self-repair film based on ethylene-butylene copolymer

A technology of ethylene butene and copolymers, which is applied in the field of self-repair of thin films in the process of dynamic light response, can solve problems affecting work efficiency and dynamic response, and achieve high repair efficiency and simple and easy preparation methods

Active Publication Date: 2016-12-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will affect the process of its dynamic response, thereby affecting work efficiency

Method used

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  • Method for preparing photic driving self-repair film based on ethylene-butylene copolymer
  • Method for preparing photic driving self-repair film based on ethylene-butylene copolymer
  • Method for preparing photic driving self-repair film based on ethylene-butylene copolymer

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0044] (1) Put 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate into a three-necked flask at a ratio of 1:6, and reflux at 100 degrees for 14 hours under nitrogen gas . Add n-pentane to the reactant, and filter with suction several times. The white powder is dried in a vacuum oven at 50°C, and finally 2-ureido-4[1hydrogen]-pyrimidinone with isocyanate group is obtained. Such as figure 1 The amino peak of the shown 2-ureido-4[1hydrogen]-pyrimidinone disappeared, indicating that the reaction of amino and isocyanate groups did occur.

[0045](2) 15mmol number-average molecular weight of 2000g / mol hydroxyl-terminated hydrogenated-1,3-butadiene homopolymer was dissolved in 500ml of chloroform, and the amount of the substance was hydroxyl-terminated hydrogenated-1,3-butadiene 2-ureido-4[1hydro]-pyrimidinone with isocyanate group was added to the above solution, and the mixture was stirred at 60°C for 16h, and then filtered with a large amount of chloroform. Di...

example 2

[0051] (1) Put 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate into a three-necked flask at a ratio of 1:6, and reflux at 110 degrees for 16 hours under nitrogen. . Add n-pentane to the reactant, and filter with suction several times. The white powder is dried in a vacuum oven at 50°C, and finally 2-ureido-4[1hydrogen]-pyrimidinone with isocyanate group is obtained.

[0052] (2) 15mmol number-average molecular weight of 5000g / mol hydroxyl-terminated hydrogenated-1,3-butadiene homopolymer is dissolved in 500ml of chloroform, and the amount of the substance is hydroxyl-terminated hydrogenated-1,3-butadiene 2-ureido-4[1hydro]-pyrimidinone with isocyanate group was added to the above solution, and the mixture was stirred at 60°C for 16h, and then filtered with a large amount of chloroform. Dibutyltin dilaurate was added in a ratio of 1:150 to the amount of hydroxyl-terminated hydrogenated-1,3-butadiene homopolymer, and then the mixture was stirred at 60°C for...

example 3

[0058] (1) Put 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate into a three-necked flask at a ratio of 1:6.5, and reflux at 120 degrees for 15 hours under nitrogen. . Add n-pentane to the reactant, and filter with suction several times. The white powder is dried in a vacuum oven at 50°C, and finally 2-ureido-4[1hydrogen]-pyrimidinone with isocyanate group is obtained.

[0059] (2) 17mmol number-average molecular weight of 7000g / mol hydroxyl-terminated hydrogenated-1,3-butadiene homopolymer was dissolved in 500ml of chloroform, and the amount of the substance was hydroxyl-terminated hydrogenated-1,3-butadiene 2-ureido-4[1hydro]-pyrimidinone with an isocyanate group three times the amount of olefin homopolymer was added to the above solution, and the mixture was stirred at 60°C for 16h, and then suction-filtered with a large amount of chloroform. Dibutyltin dilaurate was added in a ratio of 1:200 to the amount of hydroxyl-terminated hydrogenated-1,3-butadie...

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Abstract

The invention relates to a method for preparing a photic driving self-repair film based on an ethylene-butylene copolymer. The method comprises the steps of an addition reaction and forming of a quadrupolar hydrogen bond. Firstly, 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate are synthesized into UPy-NCO, then the product and poly(ethylene-butene) and 4.-di(hydroxymethyl) azobenzene react, and the two materials are compounded. The segmented copolymer capable of being repaired by itself under ultraviolet radiation is obtained, and the material is good in flexibility and high in repair efficiency, and can achieve dynamic self-repair in ultraviolet light. The shortest complete repair time of the film is 23 s.

Description

technical field [0001] The invention belongs to the field of material self-repair, in particular to a method for realizing the self-repair of a thin film in a dynamic photoresponse process by using ultraviolet light to initiate. Background technique [0002] Azobenzene is a typical photochromic substance that can act as a photoresponsive molecular actuator. Azobenzene and polymers can undergo supramolecular self-assembly, and the prepared thin films can produce three-dimensional deformation induced by light. When exposed to ultraviolet light, the film bends inwards, and can bend both layers. After removing the light, it can gradually restore its original shape. However, the film may produce internal micro-cracks and local damage during the curling process, resulting in a decline in various properties, which in turn affects the service life. It is hoped that a self-healing function can be added to the film, so that the film can find cracks and self-heal through a certain m...

Claims

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Application Information

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IPC IPC(8): C08L47/00C08K5/3462C08J5/18C08F136/06C08F8/30C08F8/04
CPCC08F8/04C08F8/30C08F2810/40C08J5/18C08J2347/00C08K5/3462C08L47/00C08F136/06
Inventor 冯奕钰司倩宇封伟
Owner TIANJIN UNIV
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