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Remoldable shape memory bismaleimide resin and application thereof

A maleimide resin, bismaleimide technology, applied in the field of thermosetting shape memory polymers and recyclable polymers, can solve the problems of poor heat resistance, poor mechanical properties, and limitations of remodelable thermosetting SMPs , to achieve the effects of outstanding heat resistance, good shape memory performance, and good remodeling performance

Active Publication Date: 2019-10-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the remodelable thermosetting SMPs reported in the existing literature are limited by the performance of the remodelable thermosetting resin matrix, and often cannot combine high heat resistance, high mechanical properties and good shape memory properties. The common problems are: ( 1) Poor heat resistance (initial thermal decomposition temperature <350°C, glass transition temperature <130°C); (2) Poor mechanical properties (tensile strength <50MPa, tensile modulus <2000MPa)
This limits the application of remodelable thermoset SMPs in high-performance fields

Method used

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  • Remoldable shape memory bismaleimide resin and application thereof
  • Remoldable shape memory bismaleimide resin and application thereof
  • Remoldable shape memory bismaleimide resin and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1) Preparation of 2-allylphenyl glycidyl ether

[0057] On a mass basis, mix 120g of 2-allylphenol, 140g of sodium hydroxide, 10g of tetrabutylammonium bromide and 230g of tetrahydrofuran, and insulate and react at 35°C for 1.5h under stirring conditions to obtain solution A; Slowly add 270 g of epichlorohydrin dropwise, and keep stirring at 35° C. for 6 hours to react; after the reaction, vacuum rotary evaporation removes tetrahydrofuran and epichlorohydrin to obtain a crude product. The crude product was washed successively with saturated ammonium chloride solution (200 mL×2), deionized water (200 mL×2), and finally separated and purified by chromatography to obtain a yellow transparent liquid, namely 2-allylphenyl Glyceryl ether, the yield is about 93%, its reaction formula and 1 H-NMR see attached figure 1 and 2 .

[0058] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl)adipate

[0059] In terms of mass, mix 120g 2-allylphenyl glycidyl ether, 40g adipi...

Embodiment 2

[0098] 1) Preparation of 2-allylphenyl glycidyl ether

[0099] On a mass basis, mix 120g of 2-allylphenol, 100g of sodium hydroxide, 5g of tetramethylammonium bromide and 200g of tetrahydrofuran, and insulate and react for 1 hour at 25°C with stirring to obtain solution A; 250 g of epichlorohydrin was added dropwise, and the mixture was stirred and reacted at 25° C. for 6 hours; after the reaction was completed, tetrahydrofuran and epichlorohydrin were removed by vacuum rotary evaporation to obtain a crude product. The crude product was washed successively with saturated ammonium chloride solution (200 mL×2), deionized water (200 mL×2), and finally separated and purified by chromatography to obtain a yellow transparent liquid, namely 2-allylphenyl Glyceryl ether, the yield is about 90.1%.

[0100] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl)adipate

[0101] By mass, mix 120g of 2-allylphenyl glycidyl ether, 36g of adipic acid, 5g of tetramethylammonium bromide a...

Embodiment 3

[0107] 1) Preparation of 2-allylphenyl glycidyl ether

[0108] On a mass basis, mix 120g of 2-allylphenol, 125g of sodium hydroxide, 7.5g of tetrabutylammonium bromide and 250g of tetrahydrofuran, and insulate and react at 35°C for 1.5h under stirring conditions to obtain solution A; 300g of epichlorohydrin was slowly added dropwise, and the reaction was carried out at 35° C. with stirring for 8 hours; after the reaction was completed, tetrahydrofuran and epichlorohydrin were removed by rotary evaporation under vacuum to obtain a crude product. The crude product was washed successively with saturated ammonium chloride solution (200 mL×2), deionized water (200 mL×2), and finally separated and purified by chromatography to obtain a yellow transparent liquid, namely 2-allylphenyl Glyceryl ether, the yield is about 91.7%.

[0109] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl)adipate

[0110] By mass, 120g of 2-allylphenyl glycidyl ether, 42g of adipic acid, 7.5g of t...

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Abstract

The invention discloses a remoldable shape memory bismaleimide resin and an application thereof. 2-allylphenyl glycidyl ether is blended with terephthalic acid in acetonitrile, and an esterification reaction is carried out with a quaternary ammonium salt as a catalyst to obtain a bis(3-(2-allylphenoxy)-2-hydroxypropyl)terephthalate containing a reversible dynamic group; and the bis(3-(2-allylphenoxy)-2-hydroxypropyl)terephthalate is uniformly mixed with bismaleimide, and the obtained mixture is cured to obtain the remoldable shape memory bismaleimide resin. The remoldable shape memory bismaleimide resin prepared in the present invention has good shape memory performance, good heat resistance and good mechanical properties, and can be remolded under a hot pressing condition. The preparationmethod of the remoldable shape memory bismaleimide resin has the characteristics of wide sources of raw materials, and simple process, and the has remoldable shape memory bismaleimide resin broad application prospects in industrial fields of aerospace, space self-expanding structures, sensors and actuators.

Description

technical field [0001] The invention relates to a remodelable shape-memory bismaleimide resin and a preparation and remodeling method thereof, belonging to the fields of thermosetting shape-memory polymers and recyclable polymers. Background technique [0002] Shape memory polymers (SMPs) are a class of intelligent materials that can deform autonomously by responding to external stimuli (heat, light, electricity, magnetism, solvents), and have the advantages of light weight, high strength, easy processing, diverse response modes, and simple shape control. advantage. Generally speaking, SMPs are divided into two types: thermosetting SMPs and thermoplastic SMPs. Thermosetting SMPs have better mechanical properties, higher thermal transition temperature and better thermal stability than thermoplastic SMPs. Structures, intelligent jet propulsion systems, and high-temperature sensors and actuators have broad application prospects. It is foreseeable that with the development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/12
CPCC08G73/12C08G2280/00C08G73/124C08G73/1078
Inventor 顾嫒娟宁礼健梁国正袁莉
Owner SUZHOU UNIV
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