Prepolymer for remoldable bismaleimide resin, and application thereof

A bismaleimide resin, bismaleimide technology, applied in the field of thermosetting shape memory polymers and recyclable polymers, can solve poor heat resistance, poor mechanical properties, limitations of remodelable thermosetting SMPs, etc. problems, to achieve the effect of outstanding heat resistance, good shape memory performance, and good reshaping 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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  • Prepolymer for remoldable bismaleimide resin, and application thereof
  • Prepolymer for remoldable bismaleimide resin, and application thereof
  • Prepolymer for remoldable bismaleimide resin, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Preparation of 2-allylphenyl glycidyl ether

[0049] By mass, 120g of 2-allylphenol, 140g of sodium hydroxide, 10g of tetrabutylammonium bromide and 230g of tetrahydrofuran were mixed, and the reaction was kept at 35°C and stirred for 1.5h to obtain solution A; Slowly add 270 g of epichlorohydrin dropwise, and keep stirring at 35°C for 6 h; after the reaction, vacuum rotary evaporation to remove 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 a chromatographic column to obtain a yellow transparent liquid, which is 2-allylphenyl acetonitrile Glyceryl ether, the yield is about 93%, and its reaction formula and 1 H-NMR see attached figure 1 and 2 .

[0050] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl) adipate

[0051] By mass, 120g of 2-allylphenyl glycidyl ether, 40g of adipic ...

Embodiment 2

[0091] 1) Preparation of 2-allylphenyl glycidyl ether

[0092] 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%.

[0093] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl)adipate

[0094] By mass, mix 120g of 2-allylphenyl glycidyl ether, 36g of adipic acid, 5g of tetramethylammonium bromide a...

Embodiment 3

[0101] 1) Preparation of 2-allylphenyl glycidyl ether

[0102] 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%.

[0103] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl)adipate

[0104] 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 prepolymer for remoldable 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; the bis(3-(2-allylphenoxy)-2-hydroxypropyl)terephthalate is uniformly mixed with bismaleimide to obtain the prepolymer for remoldable bismaleimide resin; and the prepolymer for remoldable bismaleimide resin is cured to prepare the remoldable shape memory bismaleimide resin. The remoldable shape memory bismaleimide resin prepared by using the prepolymer for the remoldable bismaleimide resin has good shape memory property,heat resistance and mechanical properties, also can be remolded under a hot pressing condition, and has broad application prospects in the fields of aerospace, space self-expanding structures, sensors and actuators.

Description

technical field [0001] The invention relates to a prepolymer for remodeling bismaleimide resin, a preparation method and application thereof, and belongs 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): C08G73/12C08L79/08
CPCC08G73/124C08G2280/00C08L79/085C08L2201/08C08L2201/12
Inventor 梁国正
Owner SUZHOU UNIV
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