Hybrid dynamic polymer composition and applications thereof

Abstract

The present invention discloses a hybrid dynamic polymer composition, which at least comprises two components A and B, wherein the component A is a dynamic polymer, the dynamic polymer at least contains a cross-linking network, and further simultaneously contains an unsaturated carbon-carbon triple bond capable of being subjected to an alkyne cross translocation double decomposition reaction and ahydrogen bond group capable of forming supramolecular hydrogen bond action, and the component B is a catalyst and / or a complex thereof for catalyzing the exchange reaction of the dynamic covalent bond in the component A. According to the present invention, the composition integrates the dynamic covalent properties and the supramolecular dynamic characteristics, wherein the supramolecular dynamiccharacteristics can make the material have stimuli responsiveness and self-healing property, and the dynamic covalent characteristics can make the covalently-cross-linked polymer have the structural stability and the mechanical strength under non-catalytic reaction conditions, and have dynamic reversibility under catalytic reaction conditions, such that the composition has characteristics of self-healing property, recyclability, repeatable processability and the like, and can be widely used in self-healing materials, toughness materials, thermal insulation materials, shape memory materials, energy storage device materials, toys, toy fillers and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a hybrid dynamic polymer composition comprising at least two components A and B and its application. Background technique [0002] Crosslinking is a general method for polymers to form a three-dimensional network structure to improve the stability and mechanical properties of polymer materials. Crosslinking can be chemical (covalent) or physical (non-covalent / supramolecular) crosslinking. Because chemical crosslinking is especially helpful to improve the stability and mechanical properties of polymer materials, it occupies a large proportion in polymer crosslinking. However, when only chemical crosslinking is used, if the crosslinking density is low, that is, the chain between crosslinking points is longer or the functionality of crosslinking points is low, the crosslinked polymer tends to be soft and lacks dimensional stability. The mechanical properties are not good; if th...

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Problems solved by technology

However, when only chemical crosslinking is used, if the crosslinking density is low, that is, the chain between crosslinking points is longer or the functionality of crosslinking points is low, the crosslinked polymer tends to be soft and lacks dimensional stability. The mechanical properties are not good; if the cross-linking density is high, that is, the chain between the cross-linking points is short or the functionality of the cross-linking points is high, it often leads to the cross-linked polymer being hard and brittle, and it is easy to break and fail; and generally The chemical cross-linking lacks dynamics. Once the chemical cross-linking is formed, the cross-linking itself cannot be changed. Not only the properties of the polymer material are fixed, but also it is difficult to recycle.

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