Preparation method of shape memory polyurethane

Abstract

The present disclosure provides a preparation method of a shape memory polyurethane, which comprising: reacting 1,3,5,7-tetrahydroxyadamantane, ϵ-caprolactone, a catalyst and a solvent for 20-50 hours under the conditions of inert gas and 70° C. to 130° C. to obtain adamantyl star poly(ϵ-caprolactone), wherein the mole ratio of the 1,3,5,7-tetrahydroxyadamantane to the ϵ-caprolactone is 1:(40-240); mixing the adamantyl star poly(ϵ-caprolactone) with long-chain diol and diisocyanate, adding the catalyst and the solvent, and reacting for 3-9 hours at 50-100° C. to obtain an isocyanate-terminated polyurethane prepolymer, wherein the mass ratio of the adamantyl star poly(ϵ-caprolactone) to the long-chain diol is 9:1-1:9; and adding a linking agent in the polyurethane prepolymer so that the linking agent reacts with isocyanate in the polyurethane prepolymer to obtain an adamantyl cross-linked shape memory polyurethane.

Dependencies are inferred from the claim text.