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Novel heat-resistant high-toughness polylactic acid composite material and preparation method thereof

A composite material and polylactic acid technology, applied in the field of composite materials, can solve problems such as deteriorating the performance of composite materials, achieve excellent mechanical properties, and ensure the effect of biodegradation characteristics

Inactive Publication Date: 2014-05-28
SHANGHAI ZAIHE IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as: CN200510030494.9 earlier PLA, organically modified montmorillonite melt-blended to obtain a heat-resistant masterbatch, and then PLA and the masterbatch were melt-blended to obtain a PLA / montmorillonite nanocomposite material. However, in the masterbatch of this invention The PLA has undergone double processing, which deteriorates the properties of the composite

Method used

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  • Novel heat-resistant high-toughness polylactic acid composite material and preparation method thereof
  • Novel heat-resistant high-toughness polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Preparation of heat-resistant masterbatch:

[0053] Take 16Kg PBAT prepolymer (80wt%), 2Kg nanomaterials organically modified montmorillonite (10wt%), 2g catalyst butyl titanate (0.01wt%), 10g modifier isocyanate (0.05wt%), 2g anti- Oxygen agent butylated hydroxyanisole (0.01wt%) and 1.986Kg antistatic agent alkylimidazoline (9.93wt%) were added to the extruder for melt extrusion at a temperature of 140°C and a screw speed of 100rpm to obtain a heat-resistant Masterbatch 1;

[0054] (2) Preparation of PLA composite materials

[0055] Take 18Kg PLA (90wt%), 1Kg (5wt%) PBAT and 1Kg heat-resistant masterbatch 1 (5wt%) and put them into the extruder to melt and extrude. The extrusion temperature is 175°C and the screw speed is 100rpm to obtain high toughness For the heat-resistant PLA composite material, its related thermal and mechanical properties are shown in Table 1.

Embodiment 2

[0057] (1) Preparation of heat-resistant masterbatch:

[0058] Get 2Kg PBS prepolymer (10wt%), 16Kg nano material organically modified montmorillonite (80wt%), 1Kg catalyst stannous octoate (5wt%), 600g modifier isocyanate (3wt%), 380g thermal stabilizer triaryl Base phosphite (1.9wt%), 20g flame retardant magnesium hydroxide (0.1wt%) were added to the extruder and melted and extruded, the temperature was 140°C, and the screw speed was 100rpm to obtain heat-resistant masterbatch 2;

[0059] (2) Preparation of PLA composite materials

[0060] Take 9.4Kg PLA (47wt%), 3.8Kg biodegradable polyester PHA (19wt%) and 6.8Kg heat-resistant masterbatch 2 (34wt%) into the extruder for melt extrusion, the extrusion temperature is 175 ° C, the screw speed The heat-resistant PLA composite material with high toughness was obtained, and its related thermal and mechanical properties are shown in Table 1.

Embodiment 3

[0062] (1) Preparation of heat-resistant masterbatch:

[0063] Get 9.5Kg lactide (47.5wt%), 8Kg nano material carbon black (40wt%), 500g catalyst aluminum oxide (2.5wt%), 1Kg modifier maleic anhydride (5wt%), 500g thermal stabilizer Trialkyl phosphite (2.5wt%) and 500g antioxidant propyl gallate (2.5wt%) were added to the extruder for melt extrusion at a temperature of 140°C and a screw speed of 100rpm to obtain a heat-resistant masterbatch 3;

[0064] (2) Preparation of PLA composite materials

[0065] Take 10.4Kg PLA (52wt%), 3.8Kg PHA (19wt%) and 5.8Kg heat-resistant masterbatch 3 (29wt%) into the extruder to melt and extrude, the extrusion temperature is 180 ° C, the screw speed is 100rpm, and the obtained The thermal and mechanical properties of the high-toughness heat-resistant PLA composites are shown in Table 1.

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Abstract

The invention belongs to the technical field of composite materials, and relates to a polylactic acid composite material and a preparation method thereof. The polylactic acid composite material is prepared from the following components in percentage by weight: 5 to 90 percent of polylactic acid, 5 to 80 percent of biodegradable polyester and 5 to 80 percent of heat-resistant master batch. The heat-resistant high-toughness polylactic acid composite material is obtained by continuous in-situ reaction extrusion. The composite material simultaneously has the characteristics of high toughness, high temperature resistance, low production cost, full biodegadability and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a polylactic acid composite material and a preparation method thereof Background technique [0002] Polylactic acid (PLA) has good biocompatibility and is a highly crystalline polymer material with a melting point of 160-180 °C. It has excellent transparency and biodegradability, so it is expected to replace traditional plastics (such as polyethylene ( PE), polypropylene (PP), polystyrene (PS, etc.) are used in packaging materials such as containers and films, as well as geotextiles, agricultural films and other fields that are difficult to recycle, such as agriculture, forestry, horticulture, civil engineering and other fields. However, PLA is severely brittle, its products have poor flexibility and low tear strength, and the heat distortion temperature (HDT) of injection molded PLA products is only about 58°C, which is far lower than the general plastics PS and PP. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L29/04C08L69/00C08L75/04C08L1/02C08J3/22C08K13/06C08K9/04C08K3/34C08K3/04C08K3/36C08K13/04C08K7/20C08K7/12C08G63/08C08G63/16C08G63/183C08G63/12C08G63/06B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704B29C2948/92761B29C2948/92885
Inventor 徐亚雷侯连龙夏鹏
Owner SHANGHAI ZAIHE IND INVESTMENT CO LTD
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