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Method for preparing transparent heat-resistant polymethyl methacrylate nano-composite membrane

A polymethyl methacrylate and nano-composite technology, which is applied in the field of polymer materials, can solve the problems of cumbersome operation, reduced thermal stability of materials, complex components, etc., and achieves the effects of high transparency, convenient molding and simple operation.

Inactive Publication Date: 2010-01-27
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods have problems such as complex composition and cumbersome operation, and the addition of small molecules reduces the thermal stability of the material.

Method used

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  • Method for preparing transparent heat-resistant polymethyl methacrylate nano-composite membrane
  • Method for preparing transparent heat-resistant polymethyl methacrylate nano-composite membrane
  • Method for preparing transparent heat-resistant polymethyl methacrylate nano-composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of transparent heat-resistant polymethyl methacrylate nanocomposite film, the method comprises the following steps:

[0020] (1) Montmorillonite (cation exchange capacity is 85mequiv·100g -1 ) was dispersed in deionized water with a concentration equal to 2wt%, and stirred at 70°C for 4 hours;

[0021] (2) dissolving polymethyl methacrylate (PMMA) in N,N-dimethylformamide to make a concentration equal to 5wt% solution;

[0022] (3) Mix the above-mentioned PMMA solution and the montmorillonite suspension in a mass ratio (100:0; 97.5:2.5; 95:5; 91:9; 82:18; 78:22), and mix them evenly at a temperature lower than 120° C. Down-casting and volatile solvents were used to prepare a transparent heat-resistant polymethyl methacrylate nanocomposite film (thickness 0.2mm). The montmorillonite content in the film was 0wt%, 1wt%, 2wt%, 4wt%, 8wt% and 10wt%.

[0023] Compared with the montmorillonite content of 0wt%, the light transmittance of the polymethyl me...

Embodiment 2

[0028] A preparation method of transparent heat-resistant polymethyl methacrylate nanocomposite film, the method comprises the following steps:

[0029] (1) The original soil of montmorillonite (cation exchange capacity is 100mequiv·100g -1 ) was dispersed in deionized water with a concentration equal to 4wt%, and stirred at 50°C for 6 hours;

[0030] (2) dissolving industrial grade polymethyl methacrylate (PMMA) in acetone and making concentration equal to 10wt% solution;

[0031] (3) Mix the above-mentioned PMMA solution and montmorillonite suspension according to the mass ratio (100:0; 97.5:2.5; 95:5; 91:9; 82:18; 78:22), and pour at a temperature of 25°C , volatile solvent to make transparent heat-resistant polymethyl methacrylate nanocomposite film (thickness 0.1mm), the content of montmorillonite in the film is 0wt%, 1wt%, 2wt%, 4wt%, 8wt% and 10wt%.

[0032] Compared with the montmorillonite content of 0wt%, the light transmittance of the polymethyl methacrylate nanoc...

Embodiment 3

[0036] A preparation method of transparent heat-resistant polymethyl methacrylate nanocomposite film, the method comprises the following steps:

[0037] (1) The original soil of montmorillonite (cation exchange capacity is 120mequiv·100g -1 ) was dispersed in deionized water with a concentration equal to 5wt%, and stirred at 90°C for 2 hours;

[0038] (2) dissolving industrial grade polymethyl methacrylate (PMMA) in tetrahydrofuran to make concentration equal to 20wt% solution;

[0039] (3) Mix the above PMMA solution and montmorillonite suspension according to the mass ratio (100:0; 96:4; 92.5:7.5; 85.7:14.3; 74:26; 69:31) and pour at a temperature of 40°C , volatile solvent to make transparent heat-resistant polymethyl methacrylate nanocomposite film (thickness 0.2mm), the content of montmorillonite in the film is 0wt%, 1wt%, 2wt%, 4wt%, 8wt% and 10wt%.

[0040] Compared with the montmorillonite content of 0wt%, the light transmittance of the polymethyl methacrylate nanoco...

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Abstract

The invention relates to a method for preparing a transparent heat-resistant polymethyl methacrylate nano-composite membrane. The method comprises the following steps: dispersing montmorillonite into deionized water, and stirring the mixture at a temperature of 50 to 90 DEG C for 2 to 6 hours to obtain a montmorillonite suspension for standby; dissolving polymethyl methacrylate into solvent to prepare polymethyl methacrylate solution; and mixing the montmorillonite suspension and the polymethyl methacrylate solution uniformly, casting the mixture at a temperature lower than 150 DEG C, and volatilizing the solvent to prepare the transparent heat-resistant polymethyl methacrylate nano-composite membrane. The content of the montmorillonite in the membrane is more than 0 weight percent and less than or equal to 10 weight percent. Compared with the prior art, the method for preparing the transparent heat-resistant polymethyl methacrylate nano-composite membrane has reasonable process and simple operation; and the nano-composite membrane cast from the polymethyl methacrylate and the montmorillonite by a solvent blending method has the advantages of convenient shaping, adjustable thickness, high transparency, good heat resistance, high use temperature and the like, and can be widely used in the industries such as external decoration materials, optical materials and the like.

Description

technical field [0001] The invention relates to polymer materials, in particular to a method for preparing a transparent heat-resistant polymethyl methacrylate nanocomposite film. Background technique [0002] Polymethyl methacrylate (PMMA, commonly known as plexiglass) is a widely used polymer material with excellent transparency, with beautiful texture and superior weather resistance. Its light transmittance is more than 10% higher than that of ordinary glass, and it is light and tough, easy to form and process, and can also perform secondary processing such as file cutting, so it is widely used in aviation, automobiles, ships, lighting, electronic instruments, optical instruments , medical equipment, building materials and stationery and other fields. Although plexiglass has many of the above advantages, its disadvantages of low operating temperature and poor heat resistance limit its application range. Therefore, it is very important to modify the plexiglass to improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L33/12C08K3/34
Inventor 吴同飞杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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