Polyacryloyl glycinamide-polyurethane self-repairing elastomer

Abstract

The invention discloses a polyacryloyl glycinamide-polyurethane self-repairing elastomer, and belongs to the technical field of functional polymer materials. Glycinamide hydrochloride and acryloyl chloride are utilized to synthesize acryloyl glycinamide monomer NAGA with multiple hydrogen bond functions, a polyurethane matrix is obtained through diisocyanate and polyglycol, and in-situ polymerization is carried out on the NAGA monomer in the polyurethane matrix so as to obtain the self-repairing elastomer. When the polyurethane elastomer is compared with other elastomers, not only can self-repairing or self-healing behaviors be achieved under the action of multiple hydrogen bonds, but also the self-repairing behavior in the presence of heat stimulation and water can be achieved separately;and good mechanical performance and repair efficiency can be achieved, and the elastomer can be applied to daily necessities, building materials, protective materials, biomedical materials and otherfields.

Description

technical field [0001] The invention relates to a polyacryloyl glycinamide-polyurethane self-repairing elastic body, which belongs to the field of functional polymer materials. Background technique [0002] Polyurethane elastomers have the characteristics of good wear resistance, mechanical properties, biocompatibility, shock absorption, and easy processing and molding, so they have received extensive attention and application. Although polyurethane has good performance, its performance and service life will be affected due to its susceptibility to damage during production and / or use. There are two kinds of modification methods of polyurethane, the foreign aid type and the intrinsic type. Among them, the foreign aid type is mainly the microcapsule method, and its main problem is not only the preparation process and cost of the microcapsule, but also the limitation of the number of repairs; the intrinsic type is mainly the introduction of disulfide bonds, Diels- Although re...

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Problems solved by technology

Among them, the foreign aid type is mainly the microcapsule method, and its main problem is not only the preparation process and cost of the microcapsule, but also the limitation of the number of repairs; the intrinsic type is mainly the introduction of disulfide bonds, Diels- Although reversible bonds or forces such as Alder (DA) reactive groups have a certain strength, their repair requires external stimuli, even complex stimuli, to fully repair the material, and the repair is actually only carried out at the reversible component site. Limits the repair efficiency of polyurethane materials

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