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Polymeric foam composite material having gradient structure and preparing method thereof

A composite material and gradient structure technology, applied in the field of foam composite materials, to achieve the effect of environmental protection and simple process

Inactive Publication Date: 2012-01-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods suitable for preparing polymer functionally graded materials mainly include: spray coating method, chemical or physical vapor deposition method (CVD, PVD), powder accumulation method, mud method, sheet lamination method, etc., but the bulk structure presents a gradient distribution polymerization Biofoam composites and their preparation methods have not been reported yet

Method used

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  • Polymeric foam composite material having gradient structure and preparing method thereof
  • Polymeric foam composite material having gradient structure and preparing method thereof
  • Polymeric foam composite material having gradient structure and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In this embodiment, polystyrene (PS) and polymethyl methacrylate (PMMA) are used as raw materials, polystyrene and polymethyl methacrylate are amorphous thermoplastic polymers, and polystyrene (PS) is produced by Taihua Produced by Plastic Co., Ltd., model 5250A230, density 1.04g / cm 3 , Polymethyl methacrylate is produced by Sumitomo Chemical Company, model LG2, density is 1.19g / cm 3 . The process steps are as follows:

[0032] (1) Preparation of the blend

[0033] According to the mass ratio batching of polystyrene (PS) and polymethyl methacrylate (PMMA), measure out PS: PMMA=90: 10, PS: PMMA=60: 40 two kinds of compositions raw materials, then two kinds of combination The raw materials of the compound were premixed at normal pressure and room temperature respectively, and mixed in a torque rheometer at normal pressure and 200°C for 6 minutes to obtain two blends of PS and PMMA with different mass ratios.

[0034] (2) Preparation of composite body

[0035] The ble...

Embodiment 2

[0040] The raw material of present embodiment is identical with embodiment 1, and processing step is as follows:

[0041] (1) Preparation of the blend

[0042] According to the mass ratio batching of polystyrene (PS) and polymethyl methacrylate (PMMA), measure out PS: PMMA=90: 10, PS: PMMA=50: 50 two kinds of compositions raw materials, then two kinds of combination The raw materials of the compound were premixed at normal pressure and room temperature respectively, and mixed in a torque rheometer at normal pressure and 200°C for 6 minutes to obtain two blends of PS and PMMA with different mass ratios.

[0043] (2) Preparation of composite body

[0044]The blends of two different mass ratios of PS and PMMA prepared in step (1) are respectively vacuum-pressed and molded, and after cooling and shaping with tap water, two sheet compositions having a thickness of 1 mm with different mass ratios of PS and PMMA are obtained , and then two sheets of PS:PMMA=90:10 sheet composition ...

Embodiment 3

[0049] This embodiment takes polystyrene (PS), polymethyl methacrylate (PMMA) and acrylonitrile-styrene copolymer (SAN) as raw materials, polystyrene, polymethyl methacrylate and acrylonitrile-styrene Copolymer is an amorphous thermoplastic polymer, and the production enterprise, model and density of polystyrene (PS) and polymethyl methacrylate (PMMA) are identical with embodiment 1, and acrylonitrile-styrene copolymer (SAN) is made of Produced by Lanzhou Petrochemical Company, model BHF, density 1.05g / cm 3 . The process steps are as follows:

[0050] (1) Preparation of the blend

[0051] According to the mass ratio batching of polystyrene (PS) and acrylonitrile-styrene copolymer (SAN) and polymethyl methacrylate (PMMA) and acrylonitrile-styrene copolymer (SAN), measure out PS: SAN= 90:10, PMMA:SAN=90:10 two compositions of raw materials, and then the raw materials of the two compositions were premixed at normal pressure and room temperature respectively, and were tested in...

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Abstract

The invention discloses a polymeric foam composite material having a gradient structure, which contains at least two thermoplastic polymers, wherein content of the thermoplastic polymers and foam size in the material change in gradient along thickness direction or radial direction. The preparing method of the polymeric foam composite material comprises the following steps of: (1) preparing a blend of series of thermoplastic polymers having same component and different mass ratios or different components; (2) molding the blend of the thermoplastic polymers prepared in the step (1) by vacuum film pressing to obtain a sheet-like composite, and then orderly overlapping at least two sheets of sheet-like composite having same component and different mass or different components and hot-pressing into one piece to form a composite material blank; and (3) placing the blank prepared in the step (2) in a foaming high-pressure reaction kettle and introducing supercritical fluid as a foaming agent, after the supercritical fluid reaches saturated condition in the blank, foaming the composite material blank by a quick pressure drop method or quick temperature rise method, and then cooling and shaping.

Description

technical field [0001] The invention belongs to the field of foam composite materials, in particular to a polymer foam composite material with a gradient structure and a preparation method thereof. Background technique [0002] Functionally graded material refers to a material whose composition or / and structure presents a gradient change along a certain spatial position (one-dimensional, two-dimensional, three-dimensional) of the material, so that the physical and chemical properties of the material and the function of the material undergo continuous or gradient changes. class of new materials. The preparation of functionally graded materials is different from the preparation of conventional materials, that is, the composition or structure of the material must be changed by various means, so the bonding between layers of different components or structures must be solved. and natural transition problems. At present, the methods suitable for preparing polymer functionally gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L33/12C08L23/06C08L23/12C08J9/12B29C44/60
Inventor 廖霞张海琛黄锦涛何婷
Owner SICHUAN UNIV
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