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Hybrid cross-linked dynamic polymer and application thereof

A hybrid cross-linking and polymer technology, applied in the field of intelligent polymers, can solve the problems of stimulation, limited dynamic effect and dynamic control ability, and inability to combine structural and dynamic properties.

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

However, the cross-linked polymers commonly used at present are often formed by a single chemical cross-link or physical cross-link, and it is not possible to organically combine the structure and reversibility in the polymer; The introduction of the covalent cross-linked network can make the cross-linked polymer have functional properties such as dynamic reversibility and stimuli responsiveness. strength and stability, build a relatively stable polymer structure system with reversible properties, so as to meet the needs of practical use
However, the current research on cross-linked polymers is still limited to a single common covalent bond or a single dynamic covalent bond, and it is impossible to organically combine the structural and dynamic properties in the polymer. At the same time, its dynamic effect and The dynamic control ability is also very limited, and a new type of dynamic polymer needs to be prepared to solve this problem

Method used

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  • Hybrid cross-linked dynamic polymer and application thereof
  • Hybrid cross-linked dynamic polymer and application thereof
  • Hybrid cross-linked dynamic polymer and application thereof

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preparation example Construction

[0201] In the preparation process of dynamic polymers, for dynamic polymers containing only one crosslinking network (this crosslinking network contains both dynamic covalent crosslinks and common covalent crosslinks), it can utilize at least one inorganic boron compound ( I) and at least one dihydroxy compound (II) participate in the reaction to generate an inorganic boronic acid ester bond and a common covalent bond to obtain hybrid crosslinking; or utilize at least one compound (III), or combine it with at least one compound ( IV) Participate in the reaction to form ordinary covalent bonds and perform hybrid cross-linking; wherein, at least one inorganic boron compound (I) or at least one dihydroxy compound (II) contains one or more other reactive groups.

[0202] For dynamic polymers with two cross-linked networks (one with only normal covalent cross-links and the other with only dynamic covalent cross-links), the network structure contains only normal covalent cross-links ...

Embodiment 1

[0283] Use pentaerythritol and 3-bromopropionic acid as raw materials, control the molar ratio of the two to 1:4, obtain pentaerythritol 3-bromopropionate through esterification, and react it with an equimolar amount of sodium azide to prepare pentaerythritol tetraazide.

[0284] Using dicyclohexylcarbodiimide and 4-dimethylaminopyridine as catalysts, polyamide with a molecular weight of about 5,000 is sequentially reacted with equimolar amounts of 5-alkynylhexanoic acid and propargyl alcohol through amidation and esterification reactions Alkyne-terminated polyamides are obtained.

[0285] Using 4-hydroxystyrene and formaldehyde as raw materials, reflux them with zinc nitrate hexahydrate for 24 hours to synthesize 2-(hydroxymethyl)-4-vinylphenol, then use methanol as solvent, AIBN as initiator, triethylamine As a catalyst, polyol compound can be obtained by reacting it with pentaerythritol tetramercaptoacetate through mercaptan-alkene click addition reaction.

[0286] Add a ...

Embodiment 2

[0289] Using 3-(allyloxy) 1,2-propanediol and hydrogen-terminated siloxane with a viscosity of about 6000mPa·s as raw materials, it is prepared by hydrosilylation under the catalytic conditions of platinum ene complex Pt(dvs). In two hydroxyl end-capped siloxane.

[0290] Using octamethylcyclotetrasiloxane and phenyltris(dimethylsiloxane)silane as raw materials and concentrated sulfuric acid as a catalyst, a three-terminal hydropolysiloxane is prepared by ring-opening polymerization.

[0291]Add 200ml of dioctyl phthalate, 4mmol of three-terminal hydrogen polysiloxane, and 12mmol of double-terminal unsaturated polyether with a molecular weight of about 1000 to a dry and clean three-necked flask, and pass nitrogen gas to remove water and oxygen for 20 minutes. Heat to 40°C for stirring and dissolving, add 1ml of 1% Pt(dvs)-THF solution as a catalyst, react for 30h under nitrogen protection conditions, and form a cross-linked network; then add 0.02mol of tris(trimethylsilyl) bor...

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Abstract

The invention discloses a hybrid cross-linked dynamic polymer. The hybrid cross-linked dynamic polymer contains an inorganic borate bond and common covalent cross-linking formed by a common covalent bond, wherein the cross-linking degree of the common covalent cross-linking in at least one cross-linking network reaches a gel point of the common covalent cross-linking or above. The hybrid cross-linked dynamic polymer integrates the respective advantages of a dynamic covalent bond and the common covalent cross-linking, and polymeric materials of abundant structures and with diversified properties can be prepared by regulating the structures of reactants. The inorganic borate bond in the hybrid cross-linked dynamic polymer has dynamic reversibility, so the polymer has functional characteristics like stimulation responsiveness and exerts toughening, damping and anti-impact effects and other effects on materials in specific structures; and the common covalent cross-linking endows the polymer with certain strength and stability. The dynamic polymer can be used for preparing damping and buffering materials, anti-impact protection materials, tough materials, sealing materials, force transducers, etc.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a hybrid cross-linked dynamic polymer composed of dynamic covalent bonds and ordinary covalent bonds. Background technique [0002] The progress of material science and technology has greatly promoted the development and changes of human society. Since the beginning of the new century, the high-tech group formed by information technology, genetic engineering technology, new energy technology, aerospace technology, nanotechnology, etc. has greatly promoted the rapid development of material science. Traditional single structural materials or functional materials can no longer meet the needs of these rapidly developing high-tech fields, and various multifunctional and intelligent materials have also emerged as the times require. [0003] In the traditional concept of polymer synthesis, new molecules are mainly designed and synthesized through common covalent bonds. Common covale...

Claims

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Application Information

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IPC IPC(8): C08G69/48C08G77/12C08G81/00C08G77/38C08G77/44C08G77/392C08G65/334C08G18/50C08G73/02C09D187/00C09J183/10C08L83/07C08L83/05C09J175/08
CPCC08G69/48C08G18/5072C08G65/3344C08G73/02C08G77/12C08G77/38C08G77/392C08G77/44C08G81/00C08L83/04C08L2205/025C08L2205/035C09D187/00C09J175/08C09J183/10C08L91/06
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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