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Dynamic covalent polymer and applications thereof

A dynamic covalent bond and polymer technology, applied in the field of intelligent polymers, can solve the problems of serious side reactions, etc., and achieve the effect of wide application, excellent performance, and rich topological structure

Pending Publication Date: 2018-08-03
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, common dynamic covalent bonds such as Dils-Alder reaction products, nitrogen oxides, etc. often need to be broken at high temperatures, and the side reactions are serious

Method used

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  • Dynamic covalent polymer and applications thereof
  • Dynamic covalent polymer and applications thereof
  • Dynamic covalent polymer and applications thereof

Examples

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preparation example Construction

[0096] In the preparation process of dynamic covalent polymer foaming materials, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic covalent polymers.

[0097] Wherein, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer to make it into a uniform foam with the help of strong stirring during the preparation of the dynamic covalent polymer, and then After physical or chemical changes, it gels and solidifies to become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0098] Wherein, the physical foaming method is to utilize physical principles to realize the foaming of the polymer in the preparation process of the dynamic covalent polymer, which generally includes the following four methods: (1) inert gas foaming method, namely Under pressure, the inert gas is pre...

Embodiment 1

[0161] Mix oligomeric polymethylhydrogensiloxane (PHMS, molecular weight 500) and acryloyloxyeicosyltrimethoxysilane to control the active hydrogen atoms in polymethylhydrogensiloxane (directly connected to Si) in the reaction The ratio of the number of moles of hydrogen atoms) to the number of moles of acryloyloxymethyltrimethoxysilane double bonds is about 1:1, and an addition reaction occurs with chloroplatinic acid as a catalyst to obtain a side group containing trimethoxysilane group of organopolysiloxanes.

[0162] The above organopolysiloxane, hydroxyl-terminated polydimethylsiloxane (molecular weight 700) and trimethyl borate were prepared according to Si-OCH 3 Group, Si-OH group and B-OR group are mixed at a molar ratio of 1:1:2, heated up to 80°C and mixed evenly, then 4ml of deionized water is added to 100g of the mixture, and then a small amount of acetic acid is added dropwise. 1.0 g of graphene and 0.5 g of organic bentonite were added thereto, and polymerization ...

Embodiment 2

[0165] Methoxy-terminated polymethylvinylsiloxane (molecular weight about 20,000) and 2-tert-butoxycarbonylaminoethanethiol, 3-mercaptopropyltrimethoxysilane according to the double bond and two mercapto compounds Molar ratio 3:2:1 mixed, add photoinitiator benzoin dimethyl ether (DMPA) relative to 0.2wt% of 2-tert-butoxycarbonylaminoethanethiol, after stirring fully, put in ultraviolet cross-linking instrument for ultraviolet radiation 4h, an organopolysiloxane containing side hydrogen bond groups was prepared.

[0166] The above-mentioned organopolysiloxane, 1,7-dichlorooctamethyltetrasiloxane and 2,6-di-tert-butyl-4-tolyldibutyl orthoboronate containing pendant hydrogen bond groups are based on Si -OCH 3 Group, Si-Cl group and B-OR group are mixed at a molar ratio of 1:1:2, take 100g of the mixture, heat up to 80°C and mix evenly, then add 4.2g of microsphere foaming agent, 2g of ammonium polyphosphate, 4ml of deionized water was stirred rapidly for 30s to mix evenly, and...

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Abstract

The present invention discloses a dynamic covalent polymer, which contains dynamic covalent inorganic silicon borate bonds, wherein the linking group linked to the silicon atoms in at least two different inorganic silicon borate bonds contains carbon atom positioned on the dynamic covalent polymer chain. According to the present invention, the dynamic covalent polymer contains the inorganic silicon borate bonds, such that the dynamic covalent polymer has characteristics of strong dynamic reversibility and strong energy dissipation property, further has functional characteristics of stimuli responsiveness, self-repair property and the like, and has broad application prospects in the fields of sports protection, functional coatings, biomimetic materials and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic covalent polymer composed of dynamic covalent bonds and an application thereof. Background technique [0002] Traditional polymers are generally composed of ordinary covalent bonds. Due to the high bond energy and thermal stability of ordinary covalent bonds, polymers have good stability and mechanical properties while lacking dynamics. Dynamic polymers are a new class of polymer systems formed by dynamic chemical bonds. According to the different dynamic chemical bonds in dynamic polymers, dynamic polymers can be divided into physical dynamic polymers based on supramolecular forces and covalent dynamic polymers based on dynamic covalent bonds. Covalent dynamic polymers constructed by dynamic reversible covalent bonds also have remarkable characteristics due to the special properties of dynamic reversible covalent bonds. [0003] Dynamic covalent bond is a kind of ...

Claims

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Application Information

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IPC IPC(8): C08G77/398C08G79/08C08G75/04C08K3/04C08K3/34C08K3/32C08J9/04
CPCC08G75/04C08G77/398C08G79/08C08J9/04C08K3/04C08K3/32C08K3/34C08G75/045C08J2383/08C08K3/346C08K2003/323
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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