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Poly(lactic acid)/poly(methyl methacrylate) alloy material and preparation method thereof

A technology of polymethyl methacrylate and alloy materials, which is applied in the field of polylactic acid/polymethyl methacrylate alloy materials and their preparation, can solve the problems of modified polylactic acid losing transparency and being unable to make transparent products, etc. Achieve the effects of simple process, broadened application range and excellent mechanical properties

Inactive Publication Date: 2010-06-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can improve the heat resistance of polylactic acid, the modified polylactic acid loses its transparency and cannot be made into transparent products. Therefore, a new method must be used to prepare transparent heat-resistant polylactic acid materials

Method used

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  • Poly(lactic acid)/poly(methyl methacrylate) alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: After vacuum-drying 99 parts of semi-crystalline poly-L-lactic acid, add 0.5 part of heat stabilizer maleic anhydride and 0.5 part of lubricant aluminum stearate, put them in a high mixer and mix at room temperature, then Extrude and granulate in the extruder, the extrusion temperature is 180-200°C, and finally use the injection machine to make the pellets into impact and bending test specimens, and the injection temperature is 180-200°C. Its mechanical properties and heat resistance are listed in Table 1.

Embodiment 2

[0024] Example 2: After vacuum-drying 90 parts of semi-crystalline poly-L-lactic acid and 9 parts of polymethyl methacrylate, add 0.5 part of heat stabilizer maleic anhydride and 0.5 part of lubricant aluminum stearate, put Mix at room temperature in a high-speed mixer, then extrude and granulate in an extruder at a temperature of 180-200°C, and finally use an injection machine to make the pellets into impact and bending test specimens at an injection temperature of 180-200°C. Its mechanical properties and heat resistance are listed in Table 1.

Embodiment 3

[0025] Example 3: After vacuum-drying 82 parts of semi-crystalline poly-L-lactic acid and 17 parts of polymethyl methacrylate, add 0.5 part of heat stabilizer maleic anhydride and 0.5 part of lubricant aluminum stearate, put Mix at room temperature in a high-speed mixer, then extrude and granulate in an extruder at a temperature of 180-200°C, and finally use an injection machine to make the pellets into impact and bending test specimens at an injection temperature of 180-200°C. Its mechanical properties and heat resistance are listed in Table 1.

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Abstract

The invention relates to a poly(lactic acid) / poly(methyl methacrylate) alloy material and a preparation method thereof. The alloy material comprises the following components in percentage by mass: 50 to 90 percent of poly(lactic acid), 10 to 50 percent of poly(methyl methacrylate), 0.1 to 2 percent of heat stabilizer, and 0.1 to 2 percent of lubricant, wherein the sum of mass percentages of the components is 100 percent. The material and the method have the advantages that: the method selects the poly(methyl methacrylate) and the poly(lactic acid) for melt blending, and the obtained polymer alloy material solves the problems that a transparent poly(lactic acid) material has poor heat resistance and is difficult to use in summer; a semitransparent material with high heat resistance is prepared by performing annealing treatment on polymer alloy, which effectively extends the application range of the poly(lactic acid); and the method is simple, can finish the preparation of the polymer alloy material through conventional plastic processing means, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a polylactic acid / polymethyl methacrylate alloy material and a preparation method thereof. Background technique [0002] As a bio-based polymer material, polylactic acid belongs to the normal carbon cycle in nature during its production and use, and will not increase the content of carbon dioxide in the atmosphere. Today, when the greenhouse effect is serious, the use of such bio-based polymer materials seems to be Particularly important. [0003] Amorphous polylactic acid has excellent transparency and light transmittance, but its poor heat resistance greatly affects its application range. For amorphous plastics, the glass transition temperature Tg is the upper limit temperature of its use, and the Tg of polylactic acid is only 58 ° C, which is far lower than the current general transparent plastics (such as PS, PMMA, PC, etc.). Poor heat resistance has always plagued the application of transparent polylactic acid materials....

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L33/12C08K5/09C08K5/1515C08K5/098B29B9/06B29C47/92B29C45/78B29C48/92
CPCB29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 尹静波范寅清蔡艳华王志春陈锋陈学思
Owner SHANGHAI UNIV
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