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A dynamic polymer elastomer with hybrid cross-linked network and its application

A hybrid cross-linking and polymer technology, applied in coatings, adhesives, etc., can solve the problems of lack of dynamics in chemical cross-linking, the inability to use elastomers, and the hardness of cross-linked polymers to achieve excellent energy dissipation performance, Good controllability, the effect of increasing toughness

Active Publication Date: 2020-07-31
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when only chemical covalent cross-linking is used, if the cross-link density is low (longer chains between cross-links / lower functionality of cross-links), the cross-linked polymer tends to be softer and have poorer mechanical properties. If the cross-linking density is high (longer chains between cross-linking points / higher cross-linking point functionality), it often leads to hard and brittle cross-linked polymers, which cannot be used as elastomers; and general chemical Cross-linking lacks dynamics. Once chemical cross-linking is formed, the cross-linking itself cannot be changed, and the properties of the polymer material are fixed.

Method used

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  • A dynamic polymer elastomer with hybrid cross-linked network and its application
  • A dynamic polymer elastomer with hybrid cross-linked network and its application
  • A dynamic polymer elastomer with hybrid cross-linked network and its application

Examples

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preparation example Construction

[0127] The preparation method of a kind of dynamic polymer ionic liquid gel of the present invention, comprises the following steps: the raw material of the dynamic polymer that prepares hybrid cross-linked network is added in ionic liquid, makes the dynamic state of prepared hybrid cross-linked network The mass fraction of the polymer is 0.5-70%, and the covalent cross-linking is carried out by the appropriate means, and after the reaction is completed, a dynamic polymer ion liquid gel is prepared. The preparation method of another kind of dynamic polymer ionic liquid gel of the present invention, comprises the following steps: will have the dynamic polymer of hybridization crosslinking network and swelling in the solvent containing ionic liquid, make the prepared hybridization crosslinking The mass fraction of the dynamic polymer in the network is 0.5-70%, and after fully swelling, the solvent is removed to form a dynamic polymer ion liquid gel. The above-mentioned ionic liq...

Embodiment 1

[0172] Mix a certain amount of 5-cyclooctene-1,2-diol and 2-imidazolidinone-4-carboxylic acid, control the molar ratio of the two to be about 1:2, and dicycloethylcarbodiimide and 4-dimethylaminopyridine as a catalyst and dichloromethane as a solvent to obtain the monomer 1a containing a hydrogen bond group.

[0173]

[0174] Mix a certain amount of hydrogen-bonding group-containing monomer 1a with cyclooctene, control the molar ratio of the two to about 1:2, use Grubbs second-generation catalyst as a catalyst, and use dichloromethane as a solvent to obtain a side group Polycyclooctene based polymers containing hydrogen bonding groups.

[0175] Mix 100 parts by mass of the above polymer and 6 parts by mass of dicumyl peroxide in dichloromethane, remove the solvent, place the mixture in a mold and heat it to 150°C for 2 hours, and obtain side group hydrogen bond after cooling Group of polycyclooctene-based dynamic polymer elastomers.

[0176] Mechanical properties: tensile...

Embodiment 2

[0179] React 3-amino-1,2-propanediol and methyl chloroformate in dichloromethane, use anhydrous sodium bicarbonate as a catalyst, and control the molar ratio of amino group to methyl chloroformate to be 10:11 to obtain a side group diols containing carbamate groups.

[0180] Diol containing carbamate groups, adipoyl chloride, butylene terephthalate with hydroxyl groups at both ends, and glycerin are reacted in dichloromethane under the catalysis of triethylamine. Control the molar ratio of diol, adipoyl chloride, and triol to be 50:50:1, and control the molar ratio of diol containing carbamate groups to butylene terephthalate with hydroxyl groups at both ends to be 1 : 1, obtain the dynamic polymer elastomer based on polyester that side group contains carbamate group.

[0181] Mechanical properties: tensile strength 35MPa, elongation at break 1470%.

[0182] This product can be used in fields that require shock absorption, impact resistance, flex resistance and sufficient st...

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Abstract

The invention discloses a dynamic polymer elastomer with a hybrid cross-linked network. The elastomer comprises the hybrid crosslinked network, and the hybrid crosslinked network contains covalent crosslinking and supermolecular hydrogen bond crosslinking, wherein the covalent crosslinking achieves a percolation threshold or more of a covalent cross-linked gel, and the hydrogen bond crosslinking is realized through hydrogen bond groups brought by polymer chain side groups and / or side chains. According to the invention, hydrogen bonds are dynamically reversible, thus the dynamic polymer elastomer has good performance such as toughness, energy dissipation performance, and self repairability. The dynamic polymer elastomer with the hybrid cross-linked network is widely applied to aspects suchas body protection in sports and daily life and work, military police body protection, explosion protection, airborne and air-drop protection, automotive collision avoidance, and electronic material impact resistant protection.

Description

technical field [0001] The invention relates to a dynamic polymer elastic body with a hybrid crosslinking network, in particular to a dynamic polymer elastic body with covalent crosslinking and supramolecular hydrogen bond crosslinking. Background technique [0002] Crosslinking is a general method for polymer elastomers to form a three-dimensional network structure to improve the thermal stability and mechanical properties of polymer elastomers. Crosslinking can be chemical (covalent) or physical (non-covalent / supramolecular) crosslinking. Because chemical crosslinking is particularly helpful to improve the thermal stability, mechanical properties, dimensional stability, etc. of polymeric elastomers, it occupies a large proportion in the crosslinking of polymeric elastomers. However, when only chemical covalent cross-linking is used, if the cross-link density is low (longer chains between cross-links / lower functionality of cross-links), the cross-linked polymer tends to be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F232/04C08F283/12C08F232/08C08F232/06C08G63/20C08G64/32C08G75/045C08G81/02C08J3/24C08L45/00C08K3/04C08K5/14C08L27/06C08K13/02C08K3/22C08K5/12C08K5/523C08K5/098C09D151/08C09J187/00
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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