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Polylactic acid and polystyrene compatibilization blending material and preparation method thereof

A technology of polystyrene and polylactic acid, which is applied in the field of polylactic acid/polystyrene compatibilized blend materials and its preparation, can solve the problems of compatibility and mechanical properties of polylactic acid/polystyrene blends, Problems such as the decrease of tensile strength, modulus and impact strength of the blend, and weak interfacial interaction force have achieved the effects of easy processing, reduced material and process costs, and high compatibilization efficiency.

Inactive Publication Date: 2016-05-04
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Styrene resin and polylactic acid have poor compatibility between the two phases, and the interphase interaction force is weak, which often leads to a sharp decrease in the tensile strength, modulus and impact strength of the blend. In order to improve the compatibility of t

Method used

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  • Polylactic acid and polystyrene compatibilization blending material and preparation method thereof
  • Polylactic acid and polystyrene compatibilization blending material and preparation method thereof
  • Polylactic acid and polystyrene compatibilization blending material and preparation method thereof

Examples

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Example Embodiment

[0024] Example 1

[0025] The compatibilizer provided by the invention prepares raw materials by the following weight proportions, and the polymerization method is soap-free emulsion polymerization:

[0026] Styrene 100

[0027] Methyl Acrylate 20

[0028] Potassium persulfate 0.7

[0029] Add 250ml of water to a 500ml flask, heat up to 40°C, add monomer and emulsifier in proportion, start stirring, heat up to 75°C, add potassium persulfate aqueous solution, and stop the reaction after 8 hours of reaction. After demulsification, filtration, washing and drying, it is ready for use.

[0030] The material provided by the present invention is configured by the following raw materials in proportion by weight:

[0031] PLA 100

[0032] polystyrene 20

[0033] Compatibilizer 0.5

[0034] First, the polylactic acid and polystyrene in the above-mentioned raw materials were dried in a vacuum drying oven at 90°C for 8 hours, the compatibilizer was dried in a vacuum drying oven at ...

Example Embodiment

[0035] Example 2

[0036] The compatibilizer provided by the invention prepares raw materials by the following weight proportions, and the polymerization method is emulsion polymerization:

[0037] Methyl Styrene 100

[0038] n-Butyl Acrylate 40

[0039] Potassium persulfate 0.7

[0040] Add 250ml of water to a 500ml flask, heat up to 40°C, add monomer and emulsifier in proportion, start stirring, heat up to 75°C, add potassium persulfate aqueous solution, and stop the reaction after 8 hours of reaction. After demulsification, filtration, washing and drying, it is ready for use.

[0041] The material provided by the present invention is configured by the following raw materials in proportion by weight:

[0042] PLA 100

[0043] High impact polystyrene 40

[0044] Compatibilizer 1

[0045] First, the polylactic acid and polystyrene in the above-mentioned raw materials were dried in a vacuum drying oven at 90°C for 8 hours, the compatibilizer was dried in a vacuum drying ...

Example Embodiment

[0046] Example 3

[0047] The compatibilizer provided by the invention prepares raw materials by the following proportions, and the polymerization method is emulsion polymerization:

[0048] Styrene 100

[0049] Methyl Acrylate 40

[0050] Potassium persulfate 0.7

[0051] Add 250ml of water to a 500ml flask, heat up to 40°C, add monomer and emulsifier in proportion, start stirring, heat up to 75°C, add potassium persulfate aqueous solution, and stop the reaction after 8 hours of reaction. After demulsification, filtration, washing and drying, it is ready for use.

[0052] The material provided by the present invention is configured by the following raw materials in proportion by weight:

[0053] PLA 100

[0054] Styrene-butadiene-styrene triblock copolymer 5

[0055] Compatibilizer 0.1

[0056] First, the polylactic acid and styrene-butadiene-styrene triblock copolymer in the above raw materials were dried in a vacuum drying oven at 90°C for 8 hours, and the compatibil...

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Abstract

The invention relates to a polylactic acid and styrene resin compatibilization blending material and a preparation method thereof. The blending material is formed by blending polylactic acid, styrene resin and a compatibilizer, and the compatibilizer is a copolymer obtained by conducting emulsion polymerization on styrene monomers and acrylate monomers according to the mass ratio of 100 to 20-40. The preparation method comprises the steps that emulsion polymerization is conducted on the styrene monomers and the acrylate monomers to obtain the compatibilizer, melt blending is conducted on the polylactic acid, the styrene resin and the compatibilizer, and then the polylactic acid and styrene resin compatibilization blending material is obtained. According to the polylactic acid and styrene resin compatibilization blending material, the tensile strength, the tensile modulus, the bending strength and the notch impact strength are improved, and the melt strength of the polylactic acid is improved; the reaction conditions are simple, the processing technology is easy to achieved, and the material cost and the technological cost of polylactic acid products are comprehensively reduced.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polylactic acid / polystyrene compatibilization blend material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a biodegradable polymer material. Compared with traditional petroleum-based polymer materials, the synthetic raw material of PLA is lactic acid, which can be fermented from plant resources and can be degraded in the natural environment after use. It does not pollute the environment, which is of great significance for protecting the environment and saving oil resources. However, due to the shortcomings of polylactic acid, such as brittleness, low melt viscosity, and high synthesis cost, it needs to be modified by blending or copolymerization. Styrenic resins are non-degradable plastics or elastomers. By blending polylactic acid with different types of styrenic resins, blended materials that meet different per...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L25/06C08L25/14C08L25/16C08L51/04C08L53/02
CPCC08L67/04C08L2205/03C08L2205/08C08L25/06C08L25/14C08L25/16C08L51/04C08L53/02
Inventor 龚兴厚高翔陈业煌廖晴雨王敏吴剑刘北军
Owner HUBEI UNIV OF TECH
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