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Preparation method of aliphatic polyester dynamic covalent network polymer, and product obtained therethrough

An aliphatic polyester and dynamic covalent bond technology is applied in the field of preparation of aliphatic polyester dynamic covalent network polymer, and achieves the effect of simple preparation method and strong operability

Active Publication Date: 2019-11-15
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no research report on the introduction of combined dynamic covalent bonds into aliphatic polyesters by melt polycondensation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare aliphatic polyester dynamic covalent network polymer, its preparation method is as follows:

[0027] (1) Add malonic acid, sebacic acid, butanediol, dithiodianiline and pentaerythritol in a molar ratio of 5:5:9.88:0.1:0.02 to a reactor equipped with a mechanical stirrer and a nitrogen inlet pipe As the reaction raw material, turn on the mechanical stirrer, introduce nitrogen as the protective gas, and carry out the esterification reaction at a temperature of 150 ° C, and the reaction ends after 5 hours;

[0028] (2) Weigh tetrabutyl titanate as a catalyst according to 0.001% of the mass of the reaction raw material, add it into the reactor after the esterification reaction is completed, and discharge the material after polycondensation at 200°C and 30Pa for 10 hours to obtain Aliphatic polyester dynamic covalent network polymer.

[0029] Performance Testing

[0030] Using chloroform as a solvent, the gel rate of the above-mentioned aliphatic polyester dynamic ...

Embodiment 2

[0032] Prepare aliphatic polyester dynamic covalent network polymer, its preparation method is as follows:

[0033] (1) Add succinic acid, ethylene glycol, dithiodipropionic acid and trimethylolpropane in a molar ratio of 9:10:1:1 into a reactor equipped with a mechanical stirrer and a nitrogen inlet pipe as For the reaction raw materials, turn on the mechanical stirrer, introduce nitrogen as a protective gas, and perform esterification reaction at a temperature of 180° C. for 2 hours;

[0034] (2) Take tetraisopropoxytitanium as a catalyst according to 0.01% of the mass of the reaction raw material, add it to the above-mentioned reactor after the esterification reaction is completed, and discharge the material after polycondensation at 230°C and 300Pa for 2 hours to obtain Obtain aliphatic polyester dynamic covalent network polymer.

[0035] Performance Testing

[0036] Using chloroform as a solvent, the gel fraction of the aliphatic polyester dynamic covalent network polym...

Embodiment 3

[0038] Prepare aliphatic polyester dynamic covalent network polymer, its preparation method is as follows:

[0039] (1) Add succinic acid, butanediol, dithiodibutyric acid and glycerol in a molar ratio of 5.6:9.8:4.4:2.2 into a reactor equipped with a mechanical stirrer and a nitrogen inlet pipe as reaction raw materials, open Mechanical stirrer, introducing nitrogen as a protective gas, esterification reaction at a temperature of 180 ° C for 3 hours;

[0040] (2) Take stannous octoate as a catalyst according to 0.1% of the mass of the reaction raw material, add it to the above-mentioned reactor after the esterification reaction is finished, then add the catalyst of the raw material mass, polycondensate at 250°C and 150Pa for 1 hour, and then discharge , to obtain dynamic covalent network polymers of aliphatic polyesters.

[0041] Performance Testing

[0042] Using chloroform as a solvent, the gel rate of the aliphatic polyester dynamic covalent network polymer was measured ...

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Abstract

The invention relates to a preparation method of an aliphatic polyester dynamic covalent network polymer, and the product obtained therethrough, and belongs to the technical field of synthesis of high-molecular materials. The preparation method comprises the following steps: an aliphatic diacid, an aliphatic diol, a crosslinking monomer and a dynamic covalent bond monomer which are used as reactants firstly undergo an esterification reaction, then a catalyst is added, and a polycondensation reaction is carried out to obtain the polymer with a dynamic covalent network structure. The preparationmethod has the advantages of simplicity, no special device and strong operability; and the prepared aliphatic polyester dynamic covalent network polymer has a gel rate of 5-98%, can be thermoplastically processed, and has a tensile strength of 0.3-40 MPa and an elongation at break of 5-1500%.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to a preparation method of an aliphatic polyester dynamic covalent network polymer and a product thereof. Background technique [0002] Polymer materials can be divided into thermoplastic polymers and thermosetting polymers according to their molding and processing characteristics. Among them, thermoplastic polymers have a linear or branched molecular chain structure. Thermoplastic polymers have the advantage of repeatable thermoplastic processing, but their resistance Heat resistance, solvent resistance and creep resistance are poor; thermosetting polymers have a cross-linked network structure, thermoplastic polymers have superior heat resistance, solvent resistance and dimensional stability, etc., but can only be molded once and cannot be repeated It is difficult to recycle after processing and use. Introducing dynamic covalent bonds into cross-link...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688
CPCC08G63/6886
Inventor 曾建兵袁温强谢东梅李以东
Owner SOUTHWEST UNIVERSITY
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