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Completely-biodegradable plasticizing polylactic resin and method for preparing same

A plasticized polylactic acid and biodegradation technology, which is applied in the field of completely biodegradable plasticized polylactic acid resin and its preparation, can solve the problems that polylactic acid resin cannot satisfy high toughness, complete biodegradability and high transparency at the same time, and achieves high molecular weight. , The effect of inhibiting free radical depolymerization and high impact resistance

Inactive Publication Date: 2013-06-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing polylactic acid resin cannot simultaneously satisfy high toughness, complete biodegradability and high transparency, and provide a kind of fully biodegradable plasticized polylactic acid resin and its preparation method

Method used

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  • Completely-biodegradable plasticizing polylactic resin and method for preparing same
  • Completely-biodegradable plasticizing polylactic resin and method for preparing same
  • Completely-biodegradable plasticizing polylactic resin and method for preparing same

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preparation example Construction

[0027] The present invention also provides the preparation method of above-mentioned polylactic acid resin, comprising:

[0028] Mix 100 parts of polylactic acid with 0.3 to 1 part of nucleating agent and 0.3 to 1 part of antioxidant, then add 10 to 40 parts of poly(diethylene glycol adipate), and then add poly(diethylene glycol adipate) The resulting mixture is blended and extruded at 130° C. to 195° C. to obtain a polylactic acid resin.

[0029] The method for mixing polylactic acid, nucleating agent and antioxidant can be a method well known to those skilled in the art, such as mixing in a blender, and the present invention is not particularly limited to this; The method of blending and extruding alcohol esters can be a method well known to those skilled in the art, preferably blending and extruding in a twin-screw extruder, and more preferably setting the temperature in the first zone of the extruder: 130°C to 150°C The temperature is 140℃~180℃, the temperature in the thi...

Embodiment 1

[0032] 1. Weigh the following components by weight:

[0033]

[0034] 2. Mix the above-mentioned polylactic acid with antioxidant 1010 and antioxidant 168 evenly, then add to the mixer and mix for 5 minutes, then add the mixed raw materials into the twin-screw extruder, and use a peristaltic pump for the side line of the extruder during the extrusion process The above-mentioned poly(diethylene glycol adipate) was quantitatively added, and the parameters of the extruder were set as listed in Table 1. The polylactic acid resin was obtained after extrusion and granulation. The mechanical properties and light transmittance of the polylactic acid resin were tested, and the test results were listed in Table 2. .

Embodiment 2

[0036] 1. Weigh the following components by weight:

[0037]

[0038]

[0039] 2. The process of this step is the same as in Example 1. The process parameters of the extruder are listed in Table 1. The polylactic acid resin is obtained after extrusion and granulation. The mechanical properties and light transmittance of the polylactic acid resin are tested. The test results are listed in Table 2.

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Abstract

The invention provides a completely-biodegradable plasticizing polylactic resin and a method for preparing the polylactic resin and belongs to the field of modification of polymer materials. The polylactic resin is prepared from polylactic acid, a plasticizing modifying agent, a nucleating agent and an oxidation resisting agent at the mass ratio of 100:(10-40):(0.3-1):(0.3-1). The melt flow rate of the polylactic resin provided by the invention can be controlled at 5-30g / 10min, the tensile elongation at break is 480%, the impact strength is 30.0KJ / m<2>, the purposes of plasticizing and toughening the polylactic acid are achieved, the resin has good transparency and complete biodegradability and the application space of the polylactic acid is extended.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a completely biodegradable plasticized polylactic acid resin and a preparation method thereof. Background technique [0002] Polylactic acid is a compound formed by the polymerization of lactic acid obtained from the fermentation of plant polysaccharides. It is a new type of renewable biodegradable material. Polylactic acid products can be biodegraded and can be recycled in nature, so they are ideal green polymer materials. Polylactic acid also has good transparency and processability. Therefore, polylactic acid materials have broad application prospects in packaging materials, fibers and nonwovens, and medical and health fields. [0003] In addition to being biodegradable, products made of polylactic acid have good biocompatibility, gloss, transparency, feel and heat resistance, and also have certain bacteria resistance, flame retardancy and UV resistance, so they a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K5/20C08K9/12C08K5/5317C08K5/134C08K5/524
Inventor 张会良张贵宝梁宏玉刘三荣郝艳平边俊甲李悦生董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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