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Chain-prolonged type fluorenyl bimaleimide and its preparation method

A bismaleimide and chain extension technology, which is applied in the field of chain extension fluorenyl bismaleimide and its preparation, can solve problems such as synthesis and solubility that have not been mentioned or discussed in detail

Inactive Publication Date: 2007-08-01
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the synthesis of chain-extended fluorenyl bismaleimides, only the literature Journal of Polymer Science: PartA: Polymer Chemistry edition, 1982, 20 has been reported, and it only mentions 3, 3', 4 Chain-extended fluorenyl bismaleimide with '4'-benzophenone tetraacid dianhydride structure, did not discuss its synthesis and solubility in detail, let alone chain-extended fluorenyl bismaleimide with other structures Laimide

Method used

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  • Chain-prolonged type fluorenyl bimaleimide and its preparation method
  • Chain-prolonged type fluorenyl bimaleimide and its preparation method
  • Chain-prolonged type fluorenyl bimaleimide and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0026] 17.4g (0.05mol) of 9,9-bis(4-aminophenyl)fluorene was dissolved in 120ml of N,N-dimethylacetamide (DMAc), cooled to 0°C in an ice bath, and equimolar The N,N-dimethylacetamide solution of maleic anhydride, after the dropwise addition was completed and reacted for 3 hours, directly added equimolar 3,3',4'4'-oxyethylene phthalic dianhydride (ODPA), After continuing to stir and react for 3 hours, add a mixture of acetic anhydride and potassium acetate, stir at room temperature for 1 hour, react at 60°C for 4 hours, and precipitate in water to obtain ether anhydride chain-extended fluorenyl bismaleimide.

Embodiment 2

[0028] Except for using 0.05mol 3, 3', 4'4'-benzophenone tetraacid dianhydride, other recipe operation steps and results are exactly the same as in Example 1, and the ketone anhydride chain extension type fluorenyl bismaleimide is obtained amine.

Embodiment 3

[0030] Except for using 0.05 mol of bisphenol A dianhydride, other formula operation steps and results are exactly the same as in Example 1, and bisphenol A dianhydride chain extension type fluorenyl bismaleimide is obtained.

[0031] The thermogravimetric analysis results of the fluorenyl bismaleimide obtained above are as shown in Table 3 and Figure 4 after thermal cyclization homopolymerization, and it can be seen that the cured resin heat of the chain extension type fluorenyl bismaleimide is The stability is better than that of the cured resin of the unextended monomer 9,9-bis(4-maleimidophenyl)fluorene. Therefore, the chain extension type fluorenyl bismaleimide can improve the processing performance while maintaining thermal stability, and the resin can be used as an additive component in various prepregs, composite materials and adhesives to improve the heat resistance of the material sex.

[0032] Table 3 Cured chain extension type fluorenyl bismaleimide thermogravimet...

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Abstract

The invention discloses a making method of new chain-extending typed fluorenyl dimaleimide, which comprises the following steps: dissolving 9, 9-di(4-amino phenyl) fluorene into N, N-dimethyl acetamide; stirring; dripping maleic anhydride of N, N-dimethyl acetamide with the same molar weight to react for 2h; adding dianhydride directly with the same molar weight; stirring 3h; adding the compound of acetic anhydride and potassium acetate; stirring under indoor temperature to react for 4h; sedimenting in the water; obtaining the product with receiving rate over 95%.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a chain extension type fluorenyl bismaleimide and a preparation method thereof. Background technique [0002] Bismaleimide resin has excellent thermal stability, high tensile strength and modulus, excellent chemical corrosion resistance and heat and humidity resistance, so as a high-performance thermosetting resin, it is widely used as a matrix resin for advanced composite materials. The bismaleimide monomer 9,9-bis(4-maleimidophenyl)fluorene synthesized from 9,9-bis(4-aminophenyl)fluorene (see structural formula (A)) It has many excellent properties, such as excellent heat resistance, high carbon residue rate, high limiting oxygen index (LOI) and good flame retardancy, etc., which has attracted people's attention. However, this monomer has a very high melting point, and its melting point exceeds 300 ° C; and it has poor solubility in most organic solvents,...

Claims

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Application Information

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IPC IPC(8): C07D207/40C07D403/14C08G73/10
Inventor 胡志强李善君
Owner FUDAN UNIV
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