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Dynamic polymer with hybrid cross-linking network and application

A hybrid cross-linking and cross-linking network technology, applied in the field of dynamic polymers, can solve problems such as performance and application limitations, lack of dynamics, covalent interpenetrating networks cannot perform any repair, etc., to improve toughness, increase toughness, The effect of good controllability

Active Publication Date: 2018-01-09
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

This kind of covalent interpenetrating network not only cannot be repaired after damage, but also lacks dynamics, which greatly limits its performance and application.

Method used

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  • Dynamic polymer with hybrid cross-linking network and application
  • Dynamic polymer with hybrid cross-linking network and application
  • Dynamic polymer with hybrid cross-linking network and application

Examples

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preparation example Construction

[0205] The preparation method of a kind of dynamic polymer ionic liquid gel of the present invention preferably comprises the following steps: the raw material of the dynamic polymer that prepares hybrid cross-linked network is added in ionic liquid, makes the prepared hybrid cross-linked network The mass fraction of the dynamic polymer is 0.5-50%. The covalent cross-linking is carried out by the appropriate means, and after the reaction is completed, it is naturally cooled to form a dynamic polymer gel. The ionic liquids mentioned above are generally composed of organic cations and inorganic anions. The cations are usually alkyl quaternary ammonium ions, alkyl quaternary ions, 1,3-dialkyl substituted imidazolium ions, N-alkyl substituted pyridinium ions, etc. ; Anions are usually halide ions, tetrafluoroborate ions, hexafluorophosphate ions, and CF 3 SO 3 - , (CF3SO 2 ) 2 N - 、C 3 f 7 COO - 、C 4 f 9 SO 3 - 、CF 3 COO - , (CF 3 SO 2 ) 3 C - , (C 2 f 5 SO 2 ...

Embodiment 1

[0215] Mix oligomeric polyvinyl alcohol (PVA) (molecular weight about 500) with a certain amount of methyl isocyanate, use triethylamine as a catalyst, and react in methylene chloride to control the molar number of PVA hydroxyl groups and isocyanate in the reaction. The ratio of the number of moles of acid radicals is about 10:6, and a polyol oligomer with carbamate groups in the side groups is obtained.

[0216] Weigh the reaction material A in parts by weight: 12 parts of the above-mentioned polyol oligomers with carbamate groups, 0.2 parts of 1,4-butanediol, 0.2 parts of dibutyltin dilaurate, 0.2 parts of Sanya Add ethyldiamine, 0.1 part of silicone oil, 6 parts of methylene chloride, and 3.5 parts of water into the container, and stir evenly at a material temperature of 35°C and a stirring speed of 200r / min; reaction material B: 14 parts of toluene di Add the isocyanate into the container, and stir evenly under the condition of material temperature 35°C and stirring speed ...

Embodiment 2

[0219] Using hydroxyethyl acrylate as a monomer and AIBN as an initiator, heat to 60°C for 2 hours to prepare polyhydroxyethyl acrylate through free radical polymerization.

[0220] The obtained polyhydroxyethyl acrylate (molecular weight is about 4000) is mixed with a certain amount of ethyl isocyanate, and triethylamine is used as a catalyst to react in methylene chloride to control the hydroxyl group in the side group of polyhydroxyethyl acrylate during the reaction. The ratio of the number of moles of isocyanate to the number of moles of isocyanate is about 10:8, so that the side groups of polyhydroxyethylacrylate have urethane groups.

[0221] Weigh the reaction material A in parts by weight: 12 parts of the above-mentioned polyol oligomers with urethane groups on the side groups, 0.5 parts of 1,4-butanediol, 0.1 parts of dibutyltin dilaurate, 0.05 parts of Sanya Add ethyldiamine, 0.1 parts of silicone oil, 6 parts of dichloromethane, and 3.5 parts of water into the conta...

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Abstract

The invention discloses a dynamic polymer with a hybrid cross-linking network. The polymer comprises at least one network structure, which contains covalent cross-linking and supermolecule hydrogen bond cross-linking; at least one network comprises covalent cross-linking; and the covalently cross-linking is above the gel point of covalently cross-linked in at least one network. Due to the reversibility of dynamic hydrogen bonds, the dynamic polymers have properties of good toughness, energy dissipation, self-healing property and the like. The dynamic polymer with a hybrid cross-linking networkprovided by the invention is widely applied to the aspects of physical protection in sports and daily life and work, physical protection of military police, explosion protection, protection of airborne troops and air drops, Impact protection of automobiles, impact protection of electronic materials, and the like.

Description

technical field [0001] The invention relates to a dynamic polymer with a hybrid crosslinking network, in particular to a dynamic polymer with covalent crosslinking and supramolecular hydrogen bond crosslinking and its application. Background technique [0002] Crosslinking is a general method for materials such as polymers to form a three-dimensional network structure to achieve effects such as elastomers, thermosetting plastics, and improvement of polymer thermal stability and mechanical properties. Crosslinking can be chemical (covalent) or physical (non-covalent / supramolecular) crosslinking. Because chemical crosslinking is especially helpful to improve polymer thermal stability, mechanical properties, dimensional stability, etc., it occupies a large proportion in polymer crosslinking. 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 polyme...

Claims

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Application Information

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IPC IPC(8): C08G18/65C08G18/66C08G18/62C08G18/50C08G18/32C08G18/69C08G65/28C08G75/045C08J9/14C08J9/08C08J3/075C08G101/00
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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