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High temperature-resistant anti-compression cross-linking polyimide foam material and preparation method and application thereof

A polyimide and foam material technology, which is applied to the high temperature resistant and high compression resistant cross-linked polyimide foam material and its preparation and application fields, can solve the problem that it is difficult to obtain high closed cell ratio and high compressive strength polyamide The imine foam material does not disclose the closed cell ratio and mechanical properties of the foam, softening and deformation of the cells, etc., and achieves the effects of high compressive strength, good meltability and low foaming performance

Active Publication Date: 2013-03-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent does not disclose data such as the closed cell ratio and mechanical properties of the foam.
Since the curing temperature of the phenylacetylene-based end-capping agent used is as high as 360-380 ° C, it is easy to cause the softening and deformation of the formed cells, so it is difficult to obtain polyimide foam materials with high closed cell rate and high compressive strength

Method used

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  • High temperature-resistant anti-compression cross-linking polyimide foam material and preparation method and application thereof
  • High temperature-resistant anti-compression cross-linking polyimide foam material and preparation method and application thereof
  • High temperature-resistant anti-compression cross-linking polyimide foam material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 1) Add 29 parts of α-BPDA, 37 parts of absolute ethanol, and 29 parts of anhydrous tetrahydrofuran into a three-neck flask equipped with a mechanical stirrer, a spherical reflux condenser and a thermometer, and heat and reflux for 3 hours under stirring to obtain a uniform phase solution.

[0071] 2) Add 33 parts of NA and 67 parts of absolute ethanol into a single-necked bottle equipped with an electromagnetic stirring device and a spherical reflux condenser, and heat for 3 hours under stirring to obtain a homogeneous solution. After cooling to room temperature, add this solution to the solution prepared in step 1) of cooling to room temperature, and add 22 parts of p-PDA, 0.13 parts of isoquinoline, and heat under reflux and stir for 15 minutes under nitrogen protection to obtain a homogeneous solution . After cooling to room temperature, add 0.25 parts of polyoxyethylene ether nonionic fluorocarbon surfactant FSO-100, stirred at room temperature for 20 minutes und...

Embodiment 2

[0083] 1) Add 29 parts of α-BPDA, 37 parts of absolute ethanol, and 29 parts of anhydrous tetrahydrofuran into a three-neck flask equipped with a mechanical stirrer, a spherical reflux condenser and a thermometer, and heat and reflux for 3 hours under stirring to obtain a uniform phase solution.

[0084] 2) Add 36 parts of MNA and 67 parts of absolute ethanol into a single-necked bottle equipped with an electromagnetic stirring device and a spherical reflux condenser, and heat for 3 hours under stirring to obtain a homogeneous solution. After cooling to room temperature, this solution was added to the solution in step 1) cooled to room temperature, and 22 parts of p-PDA and 0.13 parts of isoquinoline were added, and heated under reflux and stirred for 15 minutes under nitrogen protection to obtain a homogeneous solution . After cooling to room temperature, add 0.25 parts FSO-100, stirred at room temperature for 20 minutes under the condition of nitrogen protection, to obtain...

Embodiment 3

[0091] 1) Add 29 parts of α-BPDA, 37 parts of absolute ethanol, and 29 parts of anhydrous tetrahydrofuran into a three-neck flask equipped with a mechanical stirrer, a spherical reflux condenser and a thermometer, and heat and reflux for 3 hours under stirring to obtain a uniform phase solution.

[0092] 2) Add 11 parts of NA and 25 parts of absolute ethanol into a single-necked flask equipped with an electromagnetic stirring device and a spherical reflux condenser, and heat for 3 hours under stirring to obtain a homogeneous solution. After cooling to room temperature, this solution was added to the solution in step 1) cooled to room temperature, and 14 parts of p-PDA and 0.13 parts of isoquinoline were added, and heated under reflux and stirred for 15 minutes under nitrogen protection to obtain a homogeneous solution . After cooling to room temperature, add 0.22 parts FSO-100, stirred at room temperature for 20 minutes under the condition of nitrogen protection, to obtain ...

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Abstract

The invention discloses a novel high temperature-resistant anti-compression cross-linking polyimide foam material, a precursor and a preparation method and an application thereof. The structural formula of the cross-linking polyimide foam material precursor is shown as a formula I. The preparation method comprises the following steps: mixing organic tetracarboxylic dianhydride or malonate ester of organic tetracid, norbornene mono acid monoester and aromatic diamine mixture in organic solvent to form a polyimide precursor resin solution, removing part solvent, drying and grinding to obtain precursor powder, and heating the precursor powder to 300-400 DEG C and foaming to obtain the cross-linking polyimide foam. The method has the characteristics of simple process and low forming temperature, and the obtained foam material is high in temperature resistance, strength and toughness and low in compression deformation at high temperature. The material can be applied to preparing high temperature-resistant sandwich materials, high temperature-resistant thermal insulation materials, high temperature-resistant damping materials and high temperature-resistant wave-transmitting materials.

Description

technical field [0001] The invention relates to a high-temperature-resistant and high-compression-resistant cross-linked polyimide foam material, a preparation method and application thereof. Background technique [0002] Polyimide foam materials first appeared in the 1960s, and were produced by Monsanto and Dupont companies (US3249561) by heating and foaming polyamic acid solutions with foaming agents added. Subsequently, many patents (US patents US3483144, US6084000, US4296208, US5994418, US2006063848, European patent EP0048119, Chinese patent CN1528808) disclosed a variety of poly imide foam. Compared with other polymer foam materials, polyimide foam materials have many advantages such as high temperature resistance, low temperature resistance, low dielectric, non-combustible, radiation resistance, low smoke rate, and less toxic gas released by decomposition, which has attracted people's attention. highly anticipated. At present, polyimide foam has been widely used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08G73/12C08J9/02
Inventor 杨士勇王磊磊胡爱军范琳
Owner INST OF CHEM CHINESE ACAD OF SCI
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