Maleimide modified polymethacrylimide foam and preparation method thereof

A technology of polymethacrylimide and maleimide, which is applied in the field of maleimide-modified polymethacrylimide foam and its preparation, can solve the problem of poor temperature resistance and low mechanical strength of foam , large foam deformation and other problems, to achieve the effect of improving heat resistance, high heat resistance, and increasing imide structure

Active Publication Date: 2009-10-07
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods are prone to phase separation, large foam deformation, poor foam temperature resistance, and low mechanical strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Maleimide-modified polymethacrylimide foam of the present invention, it obtains by following component mixing reaction:

[0044] Monomer: methacrylic acid (MAA), its weight ratio is 35;

[0045] Monomer: methacrylonitrile (MAN), its weight ratio is 65;

[0046] Maleimide modifier: tribromophenylmaleimide, its weight ratio is 10;

[0047] Initiator: azobisisobutyronitrile AIBN, its weight ratio is 0.1;

[0048] Foaming agent: Virahol, its weight ratio is 10;

[0049] Nucleating agent: magnesium oxide, its weight ratio is 1;

[0050] Crosslinking agent: triallyl cyanurate, its weight ratio is 0.1.

[0051] The preparation method of above-mentioned maleimide modified polymethacrylimide foam, it adopts following steps to carry out successively:

[0052] (1) monomer methacrylic acid and methacrylonitrile, maleimide modifier, initiator, foaming agent, nucleating agent, crosslinking agent are weighed according to metering, uniformly mixed to form a reaction solution;

[...

Embodiment 2

[0057] Maleimide-modified polymethacrylimide foam of the present invention, it obtains by following component mixing reaction:

[0058] Monomer: methacrylic acid (MAA), its weight ratio is 45;

[0059] Monomer: methacrylonitrile (MAN), its weight ratio is 55;

[0060] Maleimide modifier: phenylmaleimide, its weight ratio is 1;

[0061] Initiator: azobisisovallonitrile, its weight ratio is 2.0;

[0062] Foaming agent: urea, its weight ratio is 20;

[0063] Nucleating agent: calcium oxide, its weight ratio is 8.

[0064] The preparation method of above-mentioned maleimide modified polymethacrylimide foam, it adopts following steps to carry out successively:

[0065] (1) monomer methacrylic acid and methacrylonitrile, maleimide modifier, initiator, foaming agent, nucleating agent are weighed according to metering, uniformly mixed to form a reaction solution;

[0066] (2) Put the reaction solution into a sealed mold consisting of two glass plates and rubber strips (rubber str...

Embodiment 3

[0070] Maleimide-modified polymethacrylimide foam of the present invention, it obtains by following component mixing reaction:

[0071] Monomer: methacrylic acid (MAA), its weight ratio is 55;

[0072] Monomer: methacrylonitrile (MAN), its weight ratio is 45;

[0073] Maleimide modifier: butylmaleimide, its weight ratio is 0.1;

[0074] Initiator: azobisisobutyronitrile (AIBN) and dibenzoyl peroxide mixture, its weight ratio is 1.0;

[0075] Foaming agent: tert-butyl alcohol, its weight ratio is 1.0;

[0076] Nucleating agent: urea, its weight ratio is 4.

[0077] The preparation method of above-mentioned maleimide modified polymethacrylimide foam, it adopts following steps to carry out successively:

[0078] (1) monomer methacrylic acid and methacrylonitrile, maleimide modifier, initiator, foaming agent, nucleating agent are weighed according to metering, uniformly mixed to form a reaction solution;

[0079] (2) Put the reaction solution into a sealed mold consisting of ...

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Abstract

The invention relates to high-performance copolymer foam, in particular to maleimide modified polymethacrylimide foam and a preparation method thereof. The maleimide modified polymethacrylimide foam is obtained by the mixed reaction of the components according to the weight proportions: 35-60 of methyl acrylic acid (MAA), 65-40 of methacrylonitrile (MAN), 0.1-50 of maleimide modifier, 0.10-2.0 of initiator, 1.0-20 of foaming agent, 0.1-8 of nucleating agent and 0.1-5 of crosslinking agent. The maleimide modified polymethacrylimide foam has high heat resistance, is not changed in color by heating under the temperature of 220 DEG C for long time, has the heat distortion temperature higher than 200 DEG C, and has the highest mechanical performance in all foams under the same intensity.

Description

technical field [0001] The invention relates to a high-performance copolymer foam, in particular to a maleimide-modified polymethacrylimide foam and a preparation method thereof. Background technique [0002] In the structural design of resin matrix composites, sandwich structural composites are a typical light-weight, high-strength, high-modulus structural material, which combines the high strength and The organic combination of high modulus and low density of the sandwich forms a lightweight, high-strength and high-rigidity structural composite material, which has extremely important applications in industries such as aircraft, rockets, radar, shipbuilding, transportation, and medical equipment. [0003] Polymethacrylimide (PMI) foam is mainly used as the core material of composite sandwich structure, which has the following properties: (1) 100% closed-cell structure, and isotropic; (2) good heat resistance, heat The deformation temperature is 180-240°C; (3) Excellent mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/50C08F2/44C08J9/04C08K3/22C08K5/21C08L33/02C08L33/22C08F222/40
Inventor 赵飞明穆晗
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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