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Toughening-modified organic glass plate and preparation method thereof

A technology of plexiglass and toughening modification, which is applied in the field of toughening and modified plexiglass plate and its preparation, can solve the problems of unstable performance of industrial-grade plexiglass, the performance cannot meet the requirements of use, and the cold resistance is poor. To achieve the effect of good toughening effect, excellent performance and low cost

Inactive Publication Date: 2011-07-20
713 RES INST OF CHINA SHIPBUILDING IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the cold resistance of polymethyl methacrylate is also poor, especially in low temperature environment, it is easy to stress crack
[0005] Due to the unstable performance of industrial-grade plexiglass at present, and its performance cannot meet the requirements of use, the existing domestic military plexiglass is mainly used in the aviation field, and the existing several aviation plexiglass grades are not suitable for underwater working environments. This specially developed a toughened and modified plexiglass plate to meet the raw material requirements for the production of the spherical shell body of the convex membrane module

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A toughened and modified plexiglass flat plate, the raw materials are weighed according to the following weight ratio: 90 kg of methyl methacrylate, 10 kg of butyl acrylate, 0.2 kg of azobisisobutyronitrile, and 0.3 kg of n-butyl stearate .

[0025] Preparation method: According to the actual formula ratio, measure and mix methyl methacrylate, butyl acrylate, azobisisobutyronitrile, n-butyl stearate monomers and auxiliary materials, add them to the prepolymerization tank, stir and heat, and keep the temperature 80℃±5℃, after two hours, start to detect the viscosity of the pre-polymerization slurry. After making a slurry with a viscosity of 55 seconds at room temperature, suck the slurry into a vacuum degassing storage tank through a filter for vacuum treatment. The vacuum degree is 0.085MPa. Processing time is half an hour. Then molding, pouring, polymerization, demoulding.

Embodiment 2

[0027] A toughened modified plexiglass flat plate, raw materials are weighed according to the following weight ratio: methyl methacrylate 110kg, butyl acrylate 20kg, azobisisobutyronitrile 0.3kg, n-butyl stearate 0.8kg .

[0028] Preparation method: According to the actual formula ratio, measure and mix methyl methacrylate, butyl acrylate, azobisisobutyronitrile, n-butyl stearate monomers and auxiliary materials, add them to the prepolymerization tank, stir and heat, and keep the temperature 70℃±5℃, after two hours, start to detect the viscosity of the pre-polymerized slurry. After making a slurry with a viscosity of 60 seconds at room temperature, suck the slurry through a filter into a vacuum degassing storage tank for vacuum treatment. The vacuum degree is 0.085MPa. The processing time is 1 hour. Then molding, pouring, polymerization, demoulding.

Embodiment 3

[0030] A toughened and modified plexiglass flat plate, the raw materials are weighed according to the following weight ratio: 9110 kg of methyl methacrylate, 10 kg of butyl acrylate, 0.2 kg of azobisisobutyronitrile, and 0.8 kg of n-butyl stearate .

[0031] Preparation method: According to the actual formula ratio, measure and mix methyl methacrylate, butyl acrylate, azobisisobutyronitrile, n-butyl stearate monomers and auxiliary materials, add them to the prepolymerization tank, stir and heat, and keep the temperature 90°C±5°C, after two hours, start to detect the viscosity of the pre-polymerized slurry. After making a slurry with a viscosity of 60 seconds at room temperature, suck the slurry through a filter into a vacuum degassing storage tank for vacuum treatment. The vacuum degree is 0.085MPa. Processing time is half an hour. Then, mold making, film filling, polymerization, demoulding.

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Abstract

The invention discloses a toughening-modified organic glass plate, which comprises the following raw materials in part by weight: 90 to 110 parts of methyl methacrylate, 10 to 20 parts of butyl acrylate, 0.2 to 0.3 part of azodiisobutyronitrile and 0.3 to 0.8 part of butyl stearate. The invention has the advantages that: the impact strength of the toughening-modified organic glass plate is improved by about 80 percent to 24KJ / m<2> compared with the common organic glass plate; the elongation at break is increased by about 30 percent to over 4 percent; and the toughening effect is desirable, and the reduction in tensile strength is little.

Description

technical field [0001] The invention relates to a toughened and modified organic glass plate and a preparation method thereof. Background technique [0002] At present, the water sealing device of the cylinder spout adopts a self-cracking convex membrane assembly. The spherical shell body is an important part of the convex membrane assembly. Oversized shell structure made of methyl acrylate, fastened to the mouth of the barrel with metal clamping rings. [0003] The polymers obtained by the polymerization of acrylic acid and its esters are collectively called acrylic resins, and the corresponding plastics are collectively called polyacrylic plastics, among which polymethacrylate is the most widely used. The abbreviation code of polymethyl methacrylate is PMMA, commonly known as plexiglass, which is polymerized from methyl methacrylate monomer. [0004] The mechanical properties of polymethyl methacrylate are basically hard and brittle plastics. At room temperature, its elo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08F220/14C08F220/18C08F2/02C08K5/101
Inventor 闫炜吕伟红余文辉王钰新陈金才
Owner 713 RES INST OF CHINA SHIPBUILDING IND CORP
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