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Force-sensitive color-changing self-repairing intelligent polyester elastomer and preparation method thereof,

A polyester elastomer, self-healing technology, applied in the field of force-sensitive discoloration self-healing intelligent polyester elastomer and its preparation, polyester material, to achieve the effects of high yield, enhanced stress capacity, and simple post-processing

Active Publication Date: 2019-03-12
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is currently no report that by introducing spiropyran structure and ureidopyrimidinone structure (UPy) into the polymer chain of polyester elastomer, the production and preparation can generate early warning of material performance degradation, and at the same time, to a certain extent, through self- Repair polymer materials that delay material aging

Method used

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  • Force-sensitive color-changing self-repairing intelligent polyester elastomer and preparation method thereof,
  • Force-sensitive color-changing self-repairing intelligent polyester elastomer and preparation method thereof,
  • Force-sensitive color-changing self-repairing intelligent polyester elastomer and preparation method thereof,

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 1) Weigh 1.90 g of pyrimidinone derivatives, 3.8 g of hexamethylene diisocyanate, and 14.3 mg of dibutyltin dilaurate, and react at 70° C. for 12 hours under nitrogen atmosphere to obtain 4.9 g of diisocyanate containing ureido pyrimidone structure.

[0073] Among them, the pyrimidinone derivatives used in this example are the structural formula shown in the description formula A and the specific synthetic route disclosed in the description, and the accompanying drawings figure 1 Its data representation map is given, combined with figure 1 It can be seen that various hydrogen atoms in the molecular structural formula shown in formula A have been correspondingly characterized on the map, which also shows that the pyrimidinone derivative of this example was prepared by using the synthetic route in the specification.

[0074] 2) Weigh 1.6g of spiropyran derivative, 4.9g of diisocyanate containing ureidopyrimidinone structure, 6.2mg of dibutyltin dilaurate, 12ml of nitrogen...

Embodiment 2

[0079] 1) Weigh 2.0 g of pyrimidone derivatives, 4.2 g of hexamethylene diisocyanate, and 15 mg of dibutyltin dilaurate, and react at 70° C. for 12 hours under nitrogen atmosphere to obtain 5.3 g of diisocyanate containing ureido pyrimidone structure.

[0080] 2) Weigh 1.74g of spiropyran derivative, 5.3g of diisocyanate containing ureidopyrimidinone structure, 6.7mg of dibutyltin dilaurate, 12ml of nitrogen nitrogen dimethylformamide, the reaction temperature is 25°C, and after 1 hour of reaction Purification waited till product 5.0 g.

[0081] 3) Weigh 34g of terephthalic acid, 18.6g of 1,4-butanediol, 12g of polytetramethylene glycol (2000g / mol), and 0.08g of tetrabutyl titanate, mix them uniformly, add them to the reactor, and fill them with nitrogen for replacement Then heat up to 220°C, vacuumize, add 3g polytetramethylene glycol (2000g / mol) after reacting for 3 hours; after reacting for 4h and the pressure drops to 10kPa, heat up to 245°C for polycondensation reaction, ...

Embodiment 3

[0084] 1) Weigh 2.3 g of pyrimidone derivatives, 4.7 g of hexamethylene diisocyanate, and 18.1 mg of dibutyltin dilaurate, and react at 70° C. for 12 hours under nitrogen atmosphere to obtain 5.9 g of diisocyanate containing ureido pyrimidone structure.

[0085] 2) Weigh 2.0g of spiropyran derivative, 5.9g of diisocyanate containing ureidopyrimidinone structure, 7.6mg of dibutyltin dilaurate, and 15ml of nitrogen nitrogen dimethylformamide. Purification waited till product 5.5g.

[0086] 3) Weigh 33g of terephthalic acid, 18.1g of 1,4-butanediol, 12g of polytetramethylene glycol (2000g / mol), and 0.09g of tetrabutyl titanate, mix them uniformly, add them to the reactor, and replace them with nitrogen Then heat up to 220°C, vacuumize, add 3g polytetramethylene glycol (2000g / mol) after reacting for 3 hours; after reacting for 4h and the pressure drops to 10kPa, heat up to 245°C for polycondensation reaction, when the stirring torque reaches the set value When , the reaction ends...

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Abstract

The invention discloses a force-sensitive color-changing self-repairing intelligent polyester elastomer and a preparation method thereof, and belongs to the technical field of polyester elastomer materials. A ureido pyrimidone structure and a spiropyran ring structure are introduced into a polyester elastomer polymer chain; a tetrahydrogen bond easily reversibly formed between the molecular structures of the ureido pyrimidone structure to realize self repairing of a polyester elastomer material, and the breakage of a spiropyran ring causes a color change on the surface; and a stress state of the polyester elastomer material is qualitatively judged by the color change. The preparation method disclosed by the invention is relatively easy to operate, short in reaction time, simple in post-treatment and relatively high in yield; and the prepared polyester elastomer material is relatively long in service life and can detect and prewar an external force.

Description

technical field [0001] The invention relates to polyester materials and belongs to the technical field of intelligent materials, in particular to a force-sensitive discoloration self-repairing intelligent polyester elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyester elastomer has the elasticity of rubber and the strength of engineering plastics. At the processing temperature, the crystalline micro-domains melt into polymer melts. After molding and cooling, the crystalline micro-domains are re-formed to prevent the deformation of the product. Therefore, compared with rubber, it has better processing performance and longer service life; compared with engineering plastics, it also has the characteristics of high strength, but better flexibility and dynamic mechanical properties. Therefore, TPEE has a wide range of applications in many fields such as the automobile industry, sports and leisure industry, shock-absorbing materials, and...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/38
CPCC08G18/3844C08G18/3848C08G18/4252C08G18/6666
Inventor 王栋王雯雯田时友郑玉竹赵青华梅涛刘轲鲁振坦王跃丹刘琼珍
Owner WUHAN TEXTILE UNIV
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