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Polymer foam material and preparation method thereof

A technology of foaming materials and polymers, applied in the field of polymer foaming materials and its preparation, can solve the problems of no multi-layer foaming materials, achieve high specific strength, expand the foaming range, and have a wide range of applications

Active Publication Date: 2021-02-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the research on multi-layer polymer foam materials mainly focuses on the multi-layer foam materials prepared by a single polymer, or the use of film / foam materials Alternate lamination to prepare multi-layer foam materials, there is no report of using two different polymers to prepare multi-layer foam materials

Method used

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  • Polymer foam material and preparation method thereof
  • Polymer foam material and preparation method thereof
  • Polymer foam material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0025] The preparation method of polymer foam material provided by the invention comprises:

[0026] S1, providing a first sheet formed of a first polymer and a second sheet formed of a second polymer, wherein the first sheet and the second sheet are sheets formed of different polymers, and - Under the same foaming conditions, there is an overlapping interval between the foaming temperature range of the first polymer and the foaming temperature range of the second polymer;

[0027] S2, alternately stacking the first sheet and the second sheet to form a preform, and disposing a compatibilizer layer between two adjacent sheets;

[0028] S3, foaming the preform to form first cells in the first sheet, and form second cells in the second sheet to obtain a polymer foam material.

[0029] In order to obtain a polymer foam material with an integrated structure prepared by two different polymers, when two polymers are alternately stacked to prepare a polymer foam material, it is neces...

Embodiment 1

[0054] Press polystyrene and polymethyl methacrylate into sheets with a thickness of 0.33 mm, and stack the above sheets alternately by ABA, with a total of 3 layers, in which the polystyrene sheets are stacked on two layers of polyacrylic Between the sheets of methyl acrylate, and a layer of styrene-methyl methacrylate copolymer is coated between the sheets, and then hot-pressed in a flat vulcanizer at 220°C and 15MPa for 30min, and then cold-pressed and taken out. A preform having a thickness of 1 mm was obtained.

[0055] The preform is placed in an autoclave for saturation, the saturated gas is carbon dioxide, the saturation pressure is 2MPa, the saturation time is 72h, and the temperature of the autoclave is 25°C. After the saturation is completed, the preform that has reached the saturation pressure is taken out, placed in simethicone at a temperature of 130°C for foaming, and the foaming time is 15s, and then the simethicone on the surface is cleaned to obtain the follo...

Embodiment 2

[0057] The polystyrene and polylactic acid were respectively pressed into sheets with a thickness of 0.2 mm, and the above sheets were stacked alternately in the ABAB manner, with a total of 10 layers, and hot-pressed between the sheets to form a polystyrene layer with a mass ratio of 4:6. The styrene / polylactic acid blend layer was then hot-pressed in a flat vulcanizer at 200°C and 15 MPa for 60 minutes, and then cold-pressed to obtain a preform with a thickness of 2 mm.

[0058] The preform is placed in an autoclave for saturation, the saturated gas is carbon dioxide, the saturation pressure is 4MPa, the saturation time is 12h, and the temperature of the autoclave is 25°C. After the saturation is completed, the preform that has reached the saturation pressure is taken out, placed in simethicone at a temperature of 100°C for foaming, and the foaming time is 20s, and then the simethicone on the surface is cleaned to obtain a polymerization Foam material. The polymer foam mate...

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Abstract

The invention relates to a polymer foam material and a preparation method thereof. The preparation method comprises the steps that a first sheet formed by a first polymer and a second sheet formed bya second polymer are provided, the first sheet and the second sheet are sheets formed by different polymers, and under the same foaming condition, the foaming temperature interval of the first polymerand the foaming temperature interval of the second polymer have an overlapping interval; the first sheet and the second sheet are alternately stacked to form a prefabricated product, and a compatibilizer layer is arranged between every two adjacent sheets; and the prefabricated product is foamed to form first cells in the first sheet and second cells in the second sheet to obtain the polymer foaming material with the alternately arranged first cells and second cells. The polymer foaming material has a plurality of excellent performances such as light weight, heat insulation, sound insulation,buffering and high specific strength.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polymer foam material and a preparation method thereof. Background technique [0002] Polymer foamed materials refer to polymers such as plastics, rubber, elastomers or natural polymer materials as the matrix, and microporous materials with numerous bubbles inside, which can also be regarded as composite materials with gas as the filler. Scientific research has found that the presence of cells of different sizes in polymer foams can provide better physical properties. Therefore, in recent years, multilayer polymer foams with different cell structures have attracted widespread attention. [0003] At present, the research on multi-layer polymer foam materials mainly focuses on the multi-layer foam materials prepared by a single polymer, or the alternate lamination of film / foam materials to prepare multi-layer foam materials, without the use of two different polymers. A report on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12B32B27/06B32B27/30B32B27/32B32B27/36B32B7/10B32B33/00B29C44/06C08L25/06C08L33/12C08L67/04C08L23/12C08L23/00
CPCC08J9/122B32B5/18B32B27/065B32B7/10B29C44/06C08J2325/06C08J2333/12C08J2367/04C08J2323/12C08J2323/00C08J2203/06B32B2266/0264B32B2266/025B32B2266/0228B32B2307/102B32B2307/306
Inventor 庞永艳郑文革郭冰洁覃康培
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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