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

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....

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