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Hydrolysis resistant plastification polylactic acid composition and thin film thereof

A composition and technology of polylactic acid, applied in the field of plasticized polylactic acid composition and its film, can solve the problems of harmfulness to human health, increased melt viscosity, poor thermal stability, etc., achieve low price, excellent hydrolysis resistance, avoid The effect of the cross-linking reaction

Inactive Publication Date: 2010-06-30
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in all these disclosed technologies for improving the hydrolysis resistance of polyester resins, the use of carbodiimide compounds has the following disadvantages: high price, increased melt viscosity when used, poor thermal stability, and harmful effects on human health during processing. harmful smell

Method used

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  • Hydrolysis resistant plastification polylactic acid composition and thin film thereof
  • Hydrolysis resistant plastification polylactic acid composition and thin film thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Polylactic acid resin (4032D, Nature works company, weight-average molecular weight 17-22w, optical activity 96%) and plasticizer (polyethylene glycol 6000, Sinopharm) were vacuum-dried at 80°C for more than 6 hours, and passed Screw extruder carries out melt blending extruding, when using extruder melt blending polylactic acid 70 weight parts and plasticizer 30 weight parts, add anti-hydrolysis stabilizer glycidyl methacrylate (molecular formula Commercially available) 1 weight part, the melt is granulated after cooling in a water tank, the temperature of the feeding section of the extruder is 170°C, the temperature of the second section is 190°C, and the remaining sections are 200°C, the speed of the extruder is 400rpm, and the electrostatic device is set at 9kv. A film was obtained by extension molding, and the thickness of the film was 300 μm. The molecular weight change before and after hydrolysis of the film was tested, and the results are shown in Table 1.

Embodiment 2

[0043] Polylactic acid resin (4032D, Nature works company, weight-average molecular weight 17-22w, optical activity 96%) and plasticizer (polyethylene glycol 6000, Sinopharm) were vacuum-dried at 80°C for more than 6 hours, and extruded Add glycidyl methacrylate (molecular formula commercially available) 3 parts by weight, the machine temperature and rotating speed are the same as in Example 1, and finally cast to obtain a film with a film thickness of 300 μm. The molecular weight change before and after hydrolysis of the film was tested, and the results are shown in Table 1.

Embodiment 3

[0045] Polylactic acid resin (4032D, Nature works company, weight-average molecular weight 17-22w, optical activity 96%) and plasticizer (polyethylene glycol 6000, Sinopharm) were vacuum-dried at 80°C for more than 6 hours, and extruded Glycidyl methacrylate (molecular formula Commercially available) 5 parts by weight, the machine temperature and rotating speed are the same as in Example 1, and finally cast to obtain a film with a film thickness of 300 μm. The molecular weight change before and after hydrolysis of the film was tested, and the results are shown in Table 1.

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Abstract

This invention belongs to the field of high-molecular material, disclosing a hydrolysis resistant plastification polylactic acid composition and a thin film thereof, and consisting of 50-89 parts of polylactic acid resin by weight, 10-49 parts of plasticizer by weight and 0.5-5 parts of anti-hydrolysis stabilizing agent by weight; and after being pre-mixed, the composition is formed and processed to be a thin film. The thin film obtained in the invention has good hydrolysis resistance.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a plasticized polylactic acid composition modified by an epoxy compound with excellent hydrolysis resistance and a film thereof. Background technique [0002] Polylactic acid is a polymer obtained by polymerizing lactic acid as the main raw material. The raw material source is sufficient and can be regenerated. The production process of polylactic acid is non-polluting, and the product can be biodegraded to realize the cycle in nature, so it is an ideal green polymer material. [0003] The application of polylactic acid is very extensive, and one important aspect is the application on the film. Polylactic acid has the best tensile strength and ductility, and is suitable for processing various common plastics. Compared with other biodegradable plastics, polylactic acid film has good gloss and transparency, and its appearance is similar to that obtained by polystyrene....

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K5/1515C08K5/053C08K5/103C08L71/08
Inventor 赖铮铮夏天河野俊司
Owner TORAY FIBER RES INST(CHINA) CO LTD
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