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Imide group-containing polymer foam material and preparation method thereof

A foam material and imide group technology, applied in the field of polymer foam material containing imide group and its preparation, can solve the problems of only block, limited application scope, single product form, etc., and achieve relevant performance The effect of reducing and widening the scope of application

Inactive Publication Date: 2013-04-24
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the product has a single form and can only be a block; and highly toxic and dangerous (meth)acrylonitrile is used as the main monomer during preparation
[0004] CN101550215A Pulverizes the transparent block to produce foamable particles, which expands the application range of the product, but will destroy the mechanical properties of the transparent block to a certain extent, and then affect the mechanical properties of the foam material after the transparent block is foamed; CN101550215A At the same time, highly toxic and dangerous (meth)acrylonitrile is used as the main monomer. When this method is used, the harm to production personnel and the environment cannot be underestimated.
The disadvantage is that the form of the product is single, it can only be a block
Therefore, its application range is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 100g n-butyl acrylate, 100g acrylamide, 4g cumene hydroperoxide, 1g isopropyl peroxydicarbonate, 5g carbonamide, 10g tert-butanol, 5g glycerol, 20g magnesium methacrylate 1. Add 500g of dimethylformamide into the reaction vessel, keep the temperature of the reaction vessel at 130°C, stir the solution in the reaction vessel with an electric stirrer for 10 hours, until a viscous substance is obtained;

[0039] (2) The viscous substance was washed with deionized water, and then filtered; repeated 6 times; then kept at 70° C. for 24 hours to obtain a dry copolymer;

[0040] (3) Grinding the dried copolymer into powder to obtain copolymer powder;

[0041] (4) Put the copolymer powder in the mold, maintain the mold temperature at 50°C, and keep it for 12h; then adjust the mold temperature to 100°C, and apply a pressure of 10MPa to the mold at the same time, keep it for 1h; then adjust the temperature to 200°C, After keeping for 2h, a polymer foam material containing imid...

Embodiment 2

[0044] (1) Add 50g tert-butyl methacrylate, 50g acrylamide, 2g azobisisobutyronitrile, 2g formamide, 6g glycerol, 2g zinc methacrylate, 3g zinc acrylate, 100g dimethyl sulfoxide In the reaction vessel, the temperature of the reaction vessel is kept at 40°C, and the solution in the reaction vessel is stirred by an electric stirrer for 80 hours until a viscous substance is obtained;

[0045](2) The viscous substance was washed with deionized water, then filtered, and repeated 10 times; then kept at 100° C. for 1 hour to obtain a dry copolymer;

[0046] (3) Grinding the dried copolymer into powder to obtain copolymer powder;

[0047] (4) Place the copolymer powder in the mold, maintain the mold temperature at 100°C, apply a pressure of 10MPa to the mold at the same time, and keep it for 1h; then adjust the temperature of the mold to 250°C, and apply a pressure of 10MPa to the mold at the same time, keep it for 1h; then Adjust the temperature to 100° C., and at the same time appl...

Embodiment 3

[0050] (1) 20g n-butyl methacrylate, 20g methacrylamide, 1g di-tert-butyl peroxide, 1g carbonamide, 3g ethanol, 2g zinc methacrylate, 100g benzene are added to the reaction vessel, the temperature of the reaction vessel Keep at 125°C, stir the solution in the reaction vessel with an electric stirrer for 1 hour, until a viscous substance is obtained;

[0051] (2) The viscous substance was washed with deionized water, then filtered, and repeated twice; then kept at 50° C. for 48 hours to obtain a dry copolymer;

[0052] (3) Grinding the dried copolymer into powder to obtain copolymer powder;

[0053] (4) Place the copolymer powder in the mold, maintain the mold temperature at 80°C, apply a pressure of 5MPa to the mold, and keep it for 2h; then adjust the mold temperature to 100°C, and apply a pressure of 1MPa to the mold, and keep it for 12h; then Adjust the temperature to 180° C., and at the same time apply a pressure of 1 MPa to the mold and keep it for 2 hours to obtain a po...

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Abstract

The invention discloses an imide group-containing polymer foam material and a preparation method thereof. The preparation method comprises the following steps that one or two ester group-containing propylene monomers, one or two amido group-containing propylene monomers, one or more polymerization initiators, a mixed foaming agent, one or more cross-linking agents and one or two solvents are added into a reactor and undergo a continuous reaction to form sticky substances; the sticky substances obtained from the previous step are treated by processes of washing, filtering and drying; the driedsticky substances obtained from the previous step are grinded into copolymer powder; and the copolymer powder is putted into a mould and are treated by a series of processes to form finished products. In the invention, (methyl) acrylonitrile with a severe toxicity is not utilized, and moulds can be designed according to shapes of finished products thus a foam material in any shape can be obtainedwithout being cut so that a cellular structure of the foam material is not damaged; related properties of the foam material are not reduced; and an application scope of the foam material is greatly widened. The imide group-containing polymer foam material prepared through the preparation method can be widely and directly utilized in the fields of aviation and spaceflight, carrier rockets, railwaylocomotives, ships, wind generator blades, sports goods and the like.

Description

technical field [0001] The invention relates to a foam material and a preparation method thereof, in particular to a polymer foam material containing imide groups and a preparation method thereof. Background technique [0002] Foam materials contain a large number of air bubbles, have excellent properties of light weight, high strength, shock load absorption, heat insulation and sound insulation, and are widely used. Polymethacrylimide foam has a unique molecular structure, that is, the molecular structure contains imide groups. Therefore, the performance of polymethacrylimide foam material is outstanding, and it is currently the foam material with the highest specific strength (strength / density) and specific modulus (modulus / density) in the world. It also has excellent high temperature resistance and dimensional stability. It is an ideal core material for manufacturing lightweight and high-strength composite sandwich structures, and is widely used in aerospace, launch vehi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/18C08J9/04C08J9/14C08J9/10B29C43/58
Inventor 唐红艳潘阳超陈晨
Owner ZHEJIANG SCI-TECH UNIV
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