Dynamic polymer and application thereof

A polymer and dynamic technology, applied in the field of intelligent polymers, can solve problems such as poor stability of mercaptans, application limitations, and poor dynamic activity of ester 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

[0004] However, due to the poor dynamics of the dynamic covalent bonds contained in traditional dynamic covalent polymers, dynamic polymers need to add catalysts or external energy to accelerate the equilibrium process in order to obtain good dynamic properties. In addition, some dynamic covalent bonds There are certain defects in the actual use process, which limit the use environment and application fields of dynamic polymers
For example, the traditional transesterification reaction is the earliest reversible exchange reaction used by people, but the conditions of the transesterification reaction are relatively harsh, and generally need to be completed under the conditions of adding alkali and reflux. At the same time, the dynamic activity of the traditional ester bond is poor. The application of dynamic polymers constructed by transesterification has limitations; the imine bonds formed by the reaction of primary amines and aldehydes are strongly affected by pH, so such imine bonds must be used within a specific pH range; based on alkoxy The dynamic reversible bond of the nitrogen group of

Method used

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  • Dynamic polymer and application thereof
  • Dynamic polymer and application thereof
  • Dynamic polymer and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0401] In the preparation process of dynamic polymer, three methods of mechanical foaming method, physical foaming method and chemical foaming method are mainly used to foam dynamic polymer.

[0402] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer with the help of strong stirring during the preparation of the dynamic polymer to make it a uniform foam, and then through physical Or chemical changes make it gel and solidify to become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0403] Wherein, the physical foaming method is to utilize physical principles to realize the foaming of the polymer in the preparation process of the dynamic polymer, which generally includes the following four methods: (1) inert gas foaming method, that is, after adding Press the inert gas into the molten polymer or pasty m...

Embodiment 1

[0460] Take a certain amount of binary organic boric acid compound 1 (use ethyl lithium, vinyl lithium and trimethyl borate to react to make ethyl vinyl boronic acid; take AIBN as initiator and triethylamine as catalyst, use ethyl vinyl boronic acid and 1,6-hexanedithiol by thiol-ene click reaction) dissolved in tetrahydrofuran solvent to prepare a 0.5mol / L solution; weigh a certain amount of terminal hydroxypropyl polydimethylsiloxane Diol was dissolved in tetrahydrofuran solvent to prepare a 0.1mol / L solution. Take 10mL tetrahydrofuran solution dissolved with binary organic boronic acid compound 1 and add it to a dry and clean reaction bottle, add a small amount of acetic acid dropwise, stir and mix for 15min, then slowly add 50mL dissolved hydroxypropyl polydimethyl The tetrahydrofuran solution of siloxane diol and 2 mL of triethylamine were stirred and mixed for 10 min. The above mixed solution was continuously stirred at 80°C, and the water produced by the reaction was c...

Embodiment 2

[0462] Firstly, ethyl boron dichloride is hydrolyzed into ethyl boric acid under acidic conditions, and then under the catalysis of triethylamine, organic boric acid and alcohol are synthesized through the esterification reaction of ethyl boric acid and 1,4-butanediol through organic boric acid and alcohol. For the glycol 1 of the borate bond, the molar ratio of ethyl boron dichloride and 1,4-butanediol is controlled to be 1:2; the obtained glycol 1 containing the organic borate group and Under the catalysis of dibutyltin dilaurate, excessive hexamethylene diisocyanate was copolymerized at 85°C to obtain polyurethane-based diisocyanate 2 containing organic borate bonds; then propynyl alcohol and polyurethane containing organic borate bonds Diisocyanate 2 was reacted at a mass ratio of 2:1 to obtain bispropynyl-terminated polyurethane-based diyne compound 3 containing organic boronic ester bonds. The polyurethane-based diyne compound 3 and 1,11-diazido-3,6,9-trioxaundecane cont...

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Abstract

The invention discloses a dynamic polymer. The dynamic polymer comprises a cyclic organoborate bond produced by a reaction of an organoboric acid element with a monohydroxy element, and an optional supramolecular hydrogen bond, wherein the cyclic organoborate bond exists as a polymeric chain joint and/or cross-linked chain joint for the dynamic polymer and is a necessary condition for the formation or maintenance of the structure of the dynamic polymer. Due to the dynamic reversibility of the cyclic organoborate bond and the optional supramolecular hydrogen bond, the dynamic polymer has self-repairing performance, reusability and recyclability; moreover, the dynamic polymer prepared according to a specific formula has the characteristics of energy dissipation and energy absorption and thefunctions of damping, shock absorption, sound insulation, impact resistance, high toughness and the like based on the dynamic nature of the organoborate bond when the dynamic polymer receives an external force. The dynamic polymer or a composition thereof can be extensively used as an anti-impact damping material, a self-repairing material, a tough material, a force sensor, a sealing material, a sandwich adhesive and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic polymer 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. New materials play an important role in developing high-tech, transforming and upgrading traditional industries, enhancing comprehensive national strength and national defense strength, and are developing faster and faster in the fields of natural science and engineering technology. In recent years, a variety of multifunctional and intelligent materials based on dynamic chemistry have been invented, which greatly promotes the development of new materials. [0003] Dynamic chemistry is an interdisciplinary subject developed ...

Claims

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Application Information

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IPC IPC(8): C08G79/08C08L85/04
CPCC08G79/08C08L85/04
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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