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Nanometer high polymer polylactic acid composite material and preparation method thereof

A nano-polymer and composite material technology, which is applied in the field of nano-polymer polylactic acid composite materials and its preparation, can solve the problems of polylactic acid product deformation, inability to contact with high-temperature items, unfavorable long-distance transportation, etc., and achieve high heat resistance Effect

Inactive Publication Date: 2012-07-04
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low glass transition temperature of polylactic acid as the matrix material, polylactic acid resin products are only about 60°C. When the products are shipped, the temperature in the cargo hold will continue to rise above 50°C due to the airtightness of the cargo hold. Lactic acid products are deformed, especially in hot summer; or they should not be in contact with high-temperature items when using them. For example, when a water cup is filled with water, the temperature of the boiling water is usually above 90°C, and the contact with the water cup will soften and deform it.
Therefore, most of the existing polylactic acid resin products are not conducive to long-distance transportation and the shortcomings of limited use

Method used

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  • Nanometer high polymer polylactic acid composite material and preparation method thereof
  • Nanometer high polymer polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Dry polylactic acid, nano-polycarbonate, and nano-polymethyl methacrylate in vacuum at 50°C for 8 hours to remove moisture;

[0015] (2) The above-mentioned dried polylactic acid, nano polycarbonate, nano polymethyl methacrylate, hydrolysis inhibitor carbodiimide, anti-aging agent hindered amine antioxidant, antioxidant four (β- (3,5 di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester, etc. are stirred in a dry high-speed mixer according to the weight ratio to make it evenly mixed, and then reacted in a twin-screw extruder, the screw The rotation speed is 180rpm, the extrusion temperature is 210°C, the product is air-cooled, pelletized, and vacuum-dried to obtain heat-resistant polylactic acid masterbatch.

[0016] Among them, weight percent: polylactic acid content is 88.9%, nano polycarbonate 5%, nano polymethyl methacrylate 5%, hydrolysis inhibitor DIC content is 0.5%, antiaging agent hindered amine antioxidant content is 0.5% %, the antioxidant tet...

Embodiment 2

[0018] (1) Vacuum dry polylactic acid and nano-polyoxymethylene at 70°C for 5 hours to remove moisture;

[0019] (2) The above-mentioned dried polylactic acid, nano-polyoxymethylene, hydrolysis inhibitor DCC, anti-aging agent hindered phenolic antioxidant, antioxidant (3,5-di-tert-butyl-4-hydroxyphenyl) Stearyl propionate etc. are stirred in a dry high-speed mixer according to the weight ratio to make it evenly mixed, and then reacted and extruded in a twin-screw extruder with a screw speed of 100rpm and an extrusion temperature of 190°C. Cold pelletizing and vacuum drying to obtain heat-resistant polylactic acid masterbatch.

[0020] Wherein, weight percent: wherein polylactic acid content is 93%, nano polyoxymethylene content 5%, hydrolysis inhibitor DCC content is 0.8%, melt enhancer XDI content is 0.7%, antioxidant (3,5-di-tert-butyl The content of stearyl-4-hydroxyphenyl) propionate is 0.5%.

Embodiment 3

[0022] (1) Vacuum dry polylactic acid and nano-nylon 6 at 80°C for 3 hours to remove moisture;

[0023] (2) The above-mentioned dried lactic acid, nanometer nylon 6, hydrolysis inhibitor TIC, anti-aging agent benzotriazole light stabilizer, antioxidant β-(3,5-di-tert-butyl-4-hydroxy Phenyl) cyclohexyl propionate, etc. are stirred in a dry high-speed mixer according to the weight ratio to make it evenly mixed, and then reacted and extruded in a twin-screw extruder, the screw speed is 25rpm, and the extrusion temperature is 180°C , the product is air-cooled, pelletized, and vacuum-dried to obtain heat-resistant polylactic acid masterbatches.

[0024] Among them, the weight percentage: the content of polylactic acid is 96%, the content of nanometer nylon 6 is 1%, the content of anti-aging agent benzotriazole light stabilizer is 1%, the content of melt enhancer TDI is 1%, and the content of antioxidant β -(3,5-di-tert-butyl-4-hydroxyphenyl)cyclohexyl propionate content is 1%.

...

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Abstract

The invention aims to provide a nanometer high polymer polylactic acid composite material with high heat resistance and a preparation method thereof. The nanometer high polymer polylactic acid composite material disclosed by the invention is prepared by mixing 88.9-96 percent by weight of polylactic acid, 1-10 percent by weight of high-performance nanometer high polymers, 0.5-1 percent by weight of a hydrolysis inhibitor, 0.1-1 percent by weight of an anti-ageing agent and 0.1-1 percent by weight of an antioxidant. Nano-grade fine dispersion of high-performance polymer components is realized in polylactic acid, so that the crystallization speed of polylactic acid is increased greatly, and the heat resistance of a polylactic acid material is enhanced.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a nanometer polymer polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a polymer obtained by polymerization of lactic acid as the main raw material. Its production process is non-polluting and biodegradable, so it is an ideal green polymer material. However, due to the low glass transition temperature of polylactic acid as the matrix material, polylactic acid resin products are only about 60°C. When the products are shipped, the temperature in the cargo hold will continue to rise above 50°C due to the airtightness of the cargo hold. Lactic acid products are deformed, especially in hot summer; or they should not be in contact with high-temperature items during use. For example, when a water cup is filled with water, the temperature of the boiling water is usually above 90°C, and contact w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08L33/12C08L59/02C08L67/02C08L77/02C08L77/06B29B9/06B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 张正光陈效华唐少俊
Owner CHERY AUTOMOBILE CO LTD
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