Modified epoxide resin with thermal driving shape memory function and preparation method thereof

Abstract

The invention relates to a modified epoxide resin with a shape memory function and a preparation method of the modified epoxide resin, belonging to the technical field of a functional high molecular material. The response temperature of the modified epoxide resin material provided by the invention can be adjusted within the range of 32-60 DEG C, the material can be bent at a large angle of 720 degrees at the temperature more than the thermal response temperature, and the shape fixed rate and recovery rate of the modified epoxide resin reach 100%. The preparation method of the modified epoxide resin comprises the following steps of: firstly, preparing end sulfydryl dihydric alcohol ester; secondly, preparing modified epoxide resin; and thirdly, preparing the modified epoxide resin with the shape memory function. Compared with the existing shape memory material, the modified epoxide resin has the advantages of being simple in preparation technology, capable of meeting a green environment protection requirement, low in thermal response temperature, capable of being adjusted, capable of realizing saturated solidifying, low in solidifying temperature, short in solidifying time, short in thermal response time, large in sample flexible angle, and high in shape recovery rate.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials. The invention relates to a shape-memory polymer, in particular to a modified epoxy resin with heat-driven shape-memory function and a preparation method thereof. Background technique [0002] Shape memory polymer (Shape Memory Polymer, SMP) refers to a polymer that has an initial shape, and after being deformed and fixed, the external conditions can be changed by heating or other methods to restore the original shape. It is a stimulating-inductive new functional polymer material, which has the characteristic of being able to change its shape in response to external stimuli. Since the discovery of the shape memory effect of nickel-titanium alloys in the early 1960s, the research on memory alloys has made great progress. Compared with shape memory alloys, shape memory polymer materials have incomparable characteristics such as low density, high shape recovery rate, wide memor...

AI Technical Summary

Problems solved by technology

[0004] Epoxy resin is a main resin matrix of aerospace composite materials. The Chinese patent "A liquid crystal epoxy resin with shape memory effect and its preparation method and application" (publication number CN102504202A) discloses that after heating and melting epoxy resin Pour it into a preheated mold, heat and cure, first cure at 40~170°C for 4~8 hours, and then cure at 200~220°C for 0.5~2 hours; Chinese patent "An epoxy resin shape memory polymer material and its preparation method" (publication number CN101195701A) discloses that the liquid crystal epoxy resin monomer and curing agent are dissolved, and then a curing accelerator is added, pre-cured at 50-120°C for 5-12 hours in vacuum, and then cured at a medium temperature of 150-160°C 4-6 hours, 180-220°C curing for 1-2 hours, to obtain epoxy resin shape memory materials; the epoxy resin shape memory polymer reported by the above method is difficult to achieve saturated shape memory effect, and the thermal response temperature is high, Long response time, low deformation angle and low shape recovery