Dynamic polymer with hybrid cross-linked structure and application thereof

Abstract

The invention discloses a dynamic polymer with a hybrid cross-linked structure. The dynamic polymer contains common covalent cross-linking and contains both dynamic covalent inorganic silicon borate bonds and supramolecular hydrogen bonds formed under the condition of participation of side hydrogen bond groups, wherein the cross-linking degree of the common covalent cross-linking reaches a gel point of the common covalent cross-linking or above. According to the dynamic polymer, the dynamic covalent inorganic silicon borate bonds and the supramolecular hydrogen bonds are conjugated, so the dynamic polymer has good dynamic reversibility and presents t functional characteristics like stimulation responsiveness and self repair performance; common covalent cross-linking endows the polymer withcertain strength and stability; and the existence of the inorganic silicon borate bonds and the hydrogen bonds allows the polymer to have good energy-absorbing effect and to realize toughening and damping of materials in specific structures. The dynamic polymer can be extensively used for preparing damping and buffering materials, shock-resistant protection materials, self-repairing material, tough materials, etc.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic polymer with a hybrid crosslinking network composed of ordinary covalent bonds, dynamic covalent bonds and supramolecular hydrogen bonds and its application. Background technique [0002] The traditional three-dimensional network structure is generally formed by ordinary covalent crosslinking. Because of the high bond energy, the ordinary covalent bond endows the polymer with good stability and stress bearing capacity, so it occupies an important role in the crosslinking of polymers. larger proportions. However, when only ordinary covalent cross-linking is used, if the cross-linking density is low, the cross-linking effect is often not reflected, especially the mechanical properties are not good; And brittle; and the general chemical cross-linking lacks dynamics, once the chemical cross-linking is formed, the cross-linking itself will not change, and the properties ...

AI Technical Summary

Problems solved by technology

However, when only ordinary covalent cross-linking is used, if the cross-linking density is low, the cross-linking effect is often not reflected, especially the mechanical properties are not good; And brittle; and the general chemical cross-linking lacks dynamics, once the chemical cross-linking is formed, the cross-linking itself will not change, and the properties of the polymer material will be fixed

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