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Dynamic polymer with hybrid cross-linked network and application thereof

A technology of hybrid cross-linking and cross-linking network, applied in the field of smart polymers, which can solve the problems of limitation and limited dynamics of dynamic covalent bonds.

Pending Publication Date: 2018-07-31
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polymer systems cross-linked by dynamic covalent bonds are still relatively rare, and the dynamics of existing dynamic covalent bonds are very limited, often need to add catalysts or provide energy (such as heating, light, etc.) Equilibrium process, which makes it very limited in the construction of dynamically covalently crosslinked polymer materials

Method used

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  • Dynamic polymer with hybrid cross-linked network and application thereof
  • Dynamic polymer with hybrid cross-linked network and application thereof
  • Dynamic polymer with hybrid cross-linked network and application thereof

Examples

Experimental program
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preparation example Construction

[0276] In the preparation process of the dynamic polymer, for the dynamic polymer with the first network structure (containing only one cross-linked network, and this cross-linked network contains both common covalent cross-links and organic borate bond cross-links), It can be obtained by using at least one organoboron compound (I) and at least one compound (II) containing a single hydroxyl group to participate in the reaction to form an organic borate bond and a common covalent bond for hybrid crosslinking; or by using at least one A compound (III), or it participates in the reaction with at least one organoboron compound (I) and / or at least one compound (II) containing a single hydroxyl group to form an organic borate bond and a common covalent bond for hybridization Obtained by cross-linking; or by using at least one compound (IV), or by participating in the reaction with at least one compound (V) to form a common covalent bond for hybrid cross-linking; wherein, at least one...

Embodiment 1

[0384] Take by weighing 12.5g phenylboronic acid graft modified nitrile rubber (with polybutadiene-acrylonitrile random copolymer, 4-mercaptophenylboronic acid as raw material, with DMPA as photoinitiator, under ultraviolet light irradiation condition, by Mercaptan-alkene click addition reaction makes), 22.5g hydroxyl graft modified nitrile rubber (with polybutadiene-acrylonitrile random copolymer, 2-(2-mercaptoethoxy) ethanol as raw material, Using DMPA as a photoinitiator, under the condition of ultraviolet light irradiation, through mercaptan-alkene click addition reaction) and 1.2g trihexylamine, after adding in a small internal mixer and kneading for 30min, take out the kneaded The material was cooled, placed in a twin-roller, pressed into thin sheets, cooled at room temperature, cut into pieces, and placed in an oven at 120°C for 2 hours for cross-linking to obtain nitrile rubber with a dynamic cross-linked structure. Then take by weighing 20.5g nitrile rubber, 2.25g dic...

Embodiment 2

[0386] In a dry and clean flask, take by weighing 10.8g side groups polyether polyols containing carbamate groups (first add 150g polyoxypropylene triols, catalyst KOH 1.25g in the BUSS formula external circulation reactor, and carry out nitrogen gas Replacement, after heating to 120°C, add 250g of (S)-(oxiranemethyl)carbamate tert-butyl ester to react, and the reaction temperature is controlled at 140-150°C. Under constant temperature conditions, the aging reaction is carried out for 40min, and the reactor When the pressure no longer drops, start to lower the temperature of the reactor material. When the temperature drops to 70°C, add acetic acid for neutralization reaction until the pH of the reaction system is 6.8 to obtain a polyether with a side group containing a carbamate group polyol), add 150mL DMF solvent, heat up to 50°C and stir to dissolve; then add 4.6g of random copolymers containing organic boron chloride groups and isocyanate groups in side groups (using AIBN a...

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Abstract

The invention discloses a dynamic polymer with a hybrid cross-linked network. The dynamic polymer contains common covalent cross-linking and dynamic covalent organic borate bonds. The dynamic polymerintegrates the respective advantages of the dynamic covalent organic borate bonds and the common covalent cross-linking, and polymeric materials of abundant structures and with diversified propertiescan be prepared by regulating the structures of reactants. The high dynamic reversibility of the dynamic covalent organic borate bonds in the dynamic polymer allows the polymer to present the functional characteristics of stimulation responsiveness, self repair performance; the common covalent cross-linking endows the dynamic polymer with certain strength and stability; moreover, based on the dynamic nature of the dynamic organic borate bonds, the dynamic polymer has the characteristics of energy dissipation and energy absorption and the good functions of damping, shock absorption, sound insulation, impact resistance, high toughness and the like. The dynamic polymer can be used for preparing damping and buffering materials, anti-impact protection materials, self-repairing materials, toughmaterials, force transducers, etc.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic polymer with a hybrid cross-linked network and its application. Background technique [0002] As one of the three pillars (materials, information, and energy) of the current world's new technological revolution, materials together with information technology and energy technology constitute one of the three most important and most promising fields in the world in the 21st century. It is the material basis for the development of information and energy. With the advancement of production and technology, as well as people's pursuit of material and life, various new requirements are put forward for the performance of polymer materials. In the future, polymer materials will move towards the direction of functionalization, intelligence and refinement. With continuous development, polymer materials have also expanded from structural materials to functional materials with e...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08L9/02C08L75/08C08L43/00C08L83/08C08L83/06C08L83/07C08K13/02C08K5/14C08K3/36C08K3/22C08K5/098C08K5/09C08K3/34C08K7/24C08K3/04
CPCC08L15/00C08K7/24C08K2201/011C08L75/08C08L83/08C08L2201/04C08L9/02C08K13/02C08K5/14C08K3/36C08K2003/2241C08K5/098C08K5/09C08L43/00C08K3/346C08L83/06C08L83/04C08K3/04C08L75/04
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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