Toughening modified polylactic acid composite material and method for producing the same

A composite material and a technology of toughening and modification are applied in the field of toughening and modified polylactic acid composite materials and their preparation, and can solve the problems of poor flexibility and impact resistance, limiting the large-scale popularization and application of polylactic acid, and high rigidity of polylactic acid. Achieve the effects of excellent impact resistance, excellent elongation at break, and simple preparation process

Inactive Publication Date: 2009-08-19
ANHUI KEJU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, pure polylactic acid has high rigidity, poor flexibility and impact resistance, and is a hard and bri

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1:

[0032] The weight ratio of polylactic acid is 97.9% (the following are weight ratios), TPU Elastollan C85A 1%, 1010 / 1680.2 / 0.3%, PETS 0.1%, and other additives 0.5%. The mixed materials are added to the hopper of the twin-screw extruder, melt blended, extruded and granulated into composite materials. Among them, the temperature settings of each heating zone of the screw are respectively: a zone temperature of 170°C, a zone temperature of 180°C, a zone temperature of 190°C, a zone temperature of 190°C, and a head temperature of 185°C; residence time 2 to 3 minutes, pressure It is 13Mpa.

Example Embodiment

[0033] Example 2:

[0034] The weight ratio of polylactic acid is 93.9% (the following are weight ratios), TPU Elastollan C85A 5%, 1010 / 1680.2 / 0.2%, PETS 0.1%, and other additives 0.6%. The mixed materials are added to the hopper of the twin-screw extruder, melted and blended, extruded and granulated into composite materials. Among them, the temperature settings of each heating zone of the screw are respectively: a zone temperature of 170°C, a second zone temperature of 180°C, a third zone temperature of 190°C, a fourth zone temperature of 190°C, and a head temperature of 185°C; residence time 2 to 3 minutes, pressure It is 13Mpa.

Example Embodiment

[0035] Example 3:

[0036] The weight ratio of polylactic acid is 88.9% (the following are weight ratios), TPU Elastollan C85A 10%, 1010 / 1680.3 / 0.2%, PETS 0.1%, and other additives 0.5%. The mixed materials are added to the hopper of the twin-screw extruder, melt blended, extruded and granulated into composite materials. Among them, the temperature settings of each heating zone of the screw are respectively: a zone temperature of 170°C, a second zone temperature of 180°C, a third zone temperature of 190°C, a fourth zone temperature of 190°C, and a head temperature of 185°C; residence time 2 to 3 minutes, pressure It is 13Mpa.

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PUM

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Abstract

The invention discloses a toughened polylactic acid composite and a preparation method thereof. The composite consists of the components with the weight proportion as follows: 72-98 percent of polylactic acid, 1-25 percent of toughener, 0.4-0.6 percent of antioxidant, 0.1-0.5 percent of lubricant and 0.5-2 percent of other processing promoter. In the invention, thermoplastic polyurethane is taken as the toughener, thereby improving the flexibility and the molding processability of PLA obviously and improving the shock resistance and the breaking elongation of the polylactic acid to a great extent.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a toughened modified polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid is a biodegradable polymer made from renewable plant resources. It has good biocompatibility, compostability, and biodegradability. It can be gradually degraded in the natural environment and finally decomposed into carbon dioxide and water. . It is a kind of thermoplastic aliphatic polyester, which can replace traditional materials, and has a promising industrialization prospect. It can be widely used in medical, agricultural, packaging, clothing, civil engineering, daily necessities and other fields. [0003] However, pure polylactic acid has high rigidity, poor flexibility and impact resistance, and is a hard and brittle material at room temperature, which limits the large-scale application of polylactic acid in the packaging field....

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L75/04C08K5/134C08K5/526C08K5/103B29B9/00B29C47/92B29C48/40B29C48/92
CPCB29C48/04B29C48/40
Inventor 徐东贺永谢建达
Owner ANHUI KEJU NEW MATERIALS
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