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Hyperbranched polyester as well as preparation method and application thereof

A technology of hyperbranched polyester and reactants, which is applied in the field of materials, can solve the problems of increasing the reaction probability, etc., and achieve the effects of good reproducibility, convenient operation of the preparation process, and low price

Pending Publication Date: 2022-05-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The end of hyperbranched polyester contains many reactive active groups, which can increase the probability of reaction with other molecules, and at the same time, the functional modification of the end group can be carried out, but in the prior art, self-healing and hyperbranching There are few studies on the comprehensive utilization of polyester

Method used

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  • Hyperbranched polyester as well as preparation method and application thereof
  • Hyperbranched polyester as well as preparation method and application thereof
  • Hyperbranched polyester as well as preparation method and application thereof

Examples

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Embodiment 1

[0056] A kind of hyperbranched polyester of the present embodiment, m=3, n=1, p=3, R 1 for -Ph-, R 2 for -C(CH 2 ) 2 -, R 3 for -(CH 2 ) 12 -;

[0057] The preparation method of described hyperbranched polyester comprises the following steps:

[0058] (1) Synthesis of carboxyl-terminated hyperbranched polyester: add 0.08mol trimellitic anhydride, 0.24mol citric acid, 0.0032mol p-toluenesulfonic acid, 400mL N,N-dimethyl Formamide, react at 125°C for 6h, then remove water and vacuumize, react at 130°C for 2h, after the reaction, distill off excess solvent under reduced pressure, and dry at 80°C for 24h to obtain a light yellow solid, which is a carboxyl-terminated Hyperbranched polyester; wherein the mol ratio of trimellitic anhydride and citric acid is 1:3;

[0059] (2) Furanyl-terminated hyperbranched polyester: Dissolve 0.008mol of carboxyl-terminated hyperbranched polyester in 200mL of tetrahydrofuran, then add 0.072mol of 2-furylmethylamine (furfurylamine), 0.0072mo...

Embodiment 2

[0062] A kind of hyperbranched polyester of the present embodiment, m=3, n=1, p=3, R 1 for -Ph-, R 2 for -C(CH 2 ) 2 -, R 3 for -(CH 2 ) 12 -.

[0063] The only difference between the hyperbranched polyester of this embodiment and the preparation method in Example 1 is that the furyl in the end furyl hyperbranched polyester in step (3) and the horseradish in the dodecylbismaleimide The molar ratio of imide functional groups is 1:0.5.

Embodiment 3

[0065] A kind of hyperbranched polyester of the present embodiment, m=3, n=1, p=3, R 1 for -Ph-, R 2 for -C(CH 2 ) 2 -, R 3 for -(CH 2 ) 12 -.

[0066] The only difference between the hyperbranched polyester of this embodiment and the preparation method in Example 1 is that the furyl in the end furyl hyperbranched polyester in step (3) and the horseradish in the dodecylbismaleimide The molar ratio of imide functional groups is 1:0.8.

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Abstract

The invention discloses hyperbranched polyester as well as a preparation method and application thereof, and belongs to the technical field of materials. The hyperbranched polyester disclosed by the invention has a structure as shown in a formula I, in the formula I, m is equal to 2-4, p is equal to 2-3, and n is equal to 1-3; r1 is selected from any one of a C1-C8 straight chain alkyl group, a C1-C8 branched chain alkyl group and an aryl group; r2 is selected from any one of a C1-C8 straight chain alkyl group, a C1-C8 branched chain alkyl group and an aryl group; r3 is selected from any one of a C2-C12 straight chain alkyl group, a C2-C12 branched chain alkyl group and an aryl group; the hyperbranched polyester provided by the invention has excellent rapid self-repairing performance; in addition, the preparation method provided by the invention is simple, the raw materials are conventional and low in price, the preparation process is convenient to operate, the reproducibility is good, and actual production is facilitated; meanwhile, the hyperbranched polyester provided by the invention can be applied to preparation of a self-repairing coating, so that a material coated with the self-repairing coating has rapid self-repairing capability and recoverability; other solvents do not need to be added in the application process, so that environment friendliness is achieved;

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a hyperbranched polyester and its preparation method and application. Background technique [0002] Coating functional coatings on substrates is considered to be the most effective method for protection, corrosion protection and functionalization of substrates. It is widely used in construction facilities, aviation and automobile manufacturing industries, and plays a pivotal role. However, during the use of materials, these coatings will inevitably be impacted or worn, which will cause microcracks on the surface or inside of the coating. The existence of these cracks is likely to become the stress concentration point of the entire coating and even the material. When the material is impacted again, it will be damaged to a greater extent, so the generation of microcracks can easily lead to safety hazards in the material. Inspired by the self-healing ability of organisms, people ...

Claims

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Application Information

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IPC IPC(8): C07D519/00C09D5/00
CPCC07D519/00C09D5/00
Inventor 阮文红黄思琦章明秋
Owner SUN YAT SEN UNIV
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