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Preparation method of thermosetting shape memory resin with two glass transition temperatures

A technology of glass transition and thermosetting, applied in the field of shape memory functional application of high-performance resin-based composite materials, it can solve the problems of low temperature resistance level, poor mechanical properties of memory resin, and can not be used to achieve high mechanical properties and durability temperature level, high mechanical properties, and the effect of improving mechanical properties

Inactive Publication Date: 2014-04-23
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a shape memory resin with two glass transition temperatures in view of the problems and weaknesses of the current shape memory resin, which have poor mechanical properties and low temperature resistance level, and cannot be used as a resin matrix for high-performance shape memory composite structural parts. A New System of Thermosetting Shape Memory Resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After adding 100 grams of E54 epoxy resin into a three-necked flask equipped with mechanical stirring and a thermometer, after stirring and starting to heat to 150° C., 20 grams of polyether ether ketone was added. Keep at 150°C until the polyether ether ketone is completely dissolved and a transparent solution is formed, then continue to stir and keep at 150°C, and add 35 g of diaminodiphenyl sulfone. After forming a uniform and transparent solution, pour the resin into an open mold, cool down to 110°C, and after vacuum defoaming, solidify according to the curing process of 180°C / 2h+200°C / 2h to make a casting body. After the curing is completed, the temperature is naturally lowered to below 60° C., and the cast body is taken out to obtain a shape memory resin cast body with two glass transition temperatures.

Embodiment 2

[0018] After adding 100 grams of E54 epoxy resin into a three-necked flask equipped with mechanical stirring and a thermometer, after stirring and starting to heat to 150° C., 20 grams of polyether ether ketone was added. Keep at 150°C until the polyether ether ketone is completely dissolved and a transparent solution is formed, then continue to stir and keep at 150°C, and add 35 g of diaminodiphenyl sulfone. After the uniform transparent solution is formed, the resin is poured out and refrigerated for later use as the resin matrix of the shape memory composite material.

Embodiment 3

[0020] After adding 100 grams of E54 epoxy resin into a three-necked flask equipped with mechanical stirring and a thermometer, stir and start heating to 80° C., then add 30 grams of polyamide. Keep at 80°C until the polyamide is completely dissolved and a transparent solution is formed, then continue to stir and keep at 80°C, and add 30 g of diaminodiphenylmethane. After forming a uniform and transparent solution, pour the resin into an open mold, cool down to 60°C, and after vacuum defoaming, solidify according to the curing process of 120°C / 2h to make a casting body. After the curing is completed, the temperature is naturally lowered to below 60° C., and the cast body is taken out to obtain a shape memory resin cast body with two glass transition temperatures.

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PUM

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Abstract

The invention belongs to the technical field of shape memory functional applications of high-performance resin-based composite materials and relates to a preparation method of thermosetting shape memory resin with two glass transition temperatures. The thermosetting shape memory resin comprises a thermoplastic polymer, thermosetting resin and a curing agent, wherein the glass transition temperature after the reaction of the thermosetting resin and the curing agent is 10 DEG C-200 DEG C higher than the glass transition temperature of the thermoplastic polymer. The thermosetting shape memory resin with the two glass transition temperatures provided by the invention has not only a shape memory function, but also relatively high mechanical properties and temperature-resistant glass, and can be used as a resin matrix of the shape memory composite material for intelligent morphing aircrafts and aerospace large-scale mechanisms which can be expanded automatically and realize structure-function integration of the fiber-reinforced resin-based composite material.

Description

technical field [0001] The invention belongs to the technical field of shape-memory functional application of high-performance resin-based composite materials, and relates to a preparation method of a thermosetting shape-memory resin with two glass transition temperatures. Background technique [0002] Shape memory resin is a new type of stimulus-sensing functional polymer material, which can change its shape in response to external stimuli. It is a new type of intelligent material. Compared with shape memory alloys, shape memory resins have incomparable advantages, including low density, high shape recovery rate, wide memory recovery temperature, large deformation, good processability and low cost. At present, most of the research on shape memory resins is mainly focused on thermoplastic shape memory resins. Due to their low temperature resistance and mechanical properties, their applications are mainly medical, packaging, construction, etc. that do not require mechanical p...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L61/16C08L77/00C08L79/04C08L33/12C08L35/00C08L81/06C08G59/50C08G59/40C08F222/40C08F212/34
Inventor 高军鹏邓华益小苏
Owner AVIC COMPOSITES
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