Modified polylactic acid commixture and preparation method thereof

A technology for polylactic acid and blends, which is applied in the field of modified polylactic acid blends and their preparation, can solve the problems of unguaranteed mechanical properties, and achieve simple and easy preparation methods, wide application, and guaranteed mechanical properties Effect

Pending Publication Date: 2016-12-07
SHANGHAI KINGFA SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the impact resistance of polylactic acid modified by this method is enhanced, other mechanical properties cannot be guaranteed.

Method used

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  • Modified polylactic acid commixture and preparation method thereof
  • Modified polylactic acid commixture and preparation method thereof
  • Modified polylactic acid commixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Step 1: Prepare raw materials according to the following components and parts by weight: 90kg polylactic acid, 10kg ethylene-butyl acrylate-glycidyl methacrylate, 1kg hexamethyldisilazane modified nano-silica, and 0.1kg Antioxidant 1010;

[0050] Step 2: drying the polylactic acid in step 1 to a moisture content of less than 1500ppm;

[0051] Step 3: Mix the dried polylactic acid in step 2 with ethylene-butyl acrylate-glycidyl methacrylate, hexamethyldisilazane modified nano-silica, and antioxidant 1010 in step 1 , and added to a twin-screw extruder, extruded at a temperature of 180-220° C., while cooling and granulating, the polylactic acid blend of Example 1 was obtained.

Embodiment 2

[0053] Step 1: Prepare raw materials according to the following components and parts by weight: 90kg polylactic acid, 10kg ethylene-methacrylic acid ionomer, 1kg hexamethyldisilazane modified nano-silica, 0.1kg antioxidant 1010 , and 0.1kg 4,4'-bis(phenylisopropyl)diphenylamine;

[0054] Step 2: drying the polylactic acid in step 1 to a moisture content of less than 1500ppm;

[0055] Step 3: Combine the dried polylactic acid in step 2 with the ionic polymer of ethylene-methacrylic acid in step 1, hexamethyldisilazane modified nano-silica, antioxidant 1010, and 4,4 '-di(phenylisopropyl)diphenylamine is mixed, and added to a twin-screw extruder, extruded at a temperature of 180-220°C, and simultaneously cooled and granulated to obtain the polylactic acid blend of Example 2 thing.

Embodiment 3

[0057] Step 1: Prepare raw materials according to the following components and parts by weight: 60kg polylactic acid, 40kg methyl methacrylate-butadiene-styrene copolymer, 5kg dimethyldichlorosilane modified nano-silica, 0.1kg Antioxidant 1010, 0.1kg3-aryl-benzofuranone, and 20kg glass fiber;

[0058] Step 2: drying the polylactic acid in step 1 to a moisture content of less than 1500ppm;

[0059] Step 3: Combine the dried polylactic acid in step 2 with the methyl methacrylate-butadiene-styrene copolymer in step 1, dimethyldichlorosilane modified nano-silica, antioxidant 1010, 3-Aryl-benzofuranone is mixed and fed into the twin-screw extruder. The glass fiber is fed from the side feeding port in the middle of the screw extruder, extruded at a temperature of 180-220°C, and cooled and granulated at the same time. That is, the polylactic acid blend of Example 3 was obtained.

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Abstract

The invention discloses a modified polylactic acid commixture which comprises the following components in parts by weight: 60-99 parts of polylactic acid, 1-40 parts of an anti-impact modifier, 0.1-5 parts of a nano physical compatibilizer, 0-60 parts of a filler, 0-2 parts of an antioxidant and 0-2 parts of anti-oxygen synergist, wherein the anti-impact modifier is at least one of an elastomer matrix polymer and a product prepped by grafting or copolymerizing the elastomer matrix polymer with functional groups. The invention further provides a preparation method of the modified polylactic acid commixture. Compared with the prior art, the modified polylactic acid commixture disclosed by the invention is capable of ensuring that other mechanical properties of polylactic acid can be at a relatively high level while the impact resistance of the polylactic acid is improved.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a modified polylactic acid blend and a preparation method thereof. Background technique [0002] Polylactic acid belongs to aliphatic thermoplastic polyester, which is biodegradable, and its synthetic raw materials are renewable resources. As the most promising green environmental protection material in the 21st century, it has become a key research material in various countries. Polylactic acid has good processing performance, and excellent tensile strength and light transmittance, and various plastic products can be prepared by traditional extrusion, injection molding, blow molding and other processing methods. [0003] However, the impact resistance of polylactic acid is poor, and the impact strength is less than 5kJ / m2, which greatly limits its wide application. Therefore, extensive research has been carried out at home and abroad around the serious brittleness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/08C08L33/12C08K13/06C08K9/06C08K3/36C08K5/134C08K5/18C08K7/14
CPCC08K2201/011C08L67/04C08L2205/08C08L23/0884C08K9/06C08K3/36C08K5/1345C08L23/0876C08K13/06C08K5/18C08L33/12C08K7/14
Inventor 林洁龙肖军华杨波周英辉丁正亚张超罗忠富
Owner SHANGHAI KINGFA SCI & TECH
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