High-toughness and highly heat-resistant polylactic acid (PLA) alloy material and preparation method thereof

An alloy material, polylactic acid technology, applied in the field of polymer materials and their preparation, can solve problems such as less modification research, and achieve the effects of low cost, improved toughness and heat resistance, and high melt strength

Inactive Publication Date: 2012-02-15
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since toughening modification and heat-resistant modification are contradictory opposites, the current modification is mainly aimed at one aspect of toughening or heat-resistant modification, and at the same time, there are few studies on the modification of the two.

Method used

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  • High-toughness and highly heat-resistant polylactic acid (PLA) alloy material and preparation method thereof
  • High-toughness and highly heat-resistant polylactic acid (PLA) alloy material and preparation method thereof
  • High-toughness and highly heat-resistant polylactic acid (PLA) alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Vacuum dry polylactic acid, polycarbonate, polymethyl methacrylate, and ABS at 50°C for 8 hours to remove moisture;

[0022] (2) the above-mentioned polycarbonate after drying, polymethyl methacrylate and ABS and hydrolysis inhibitor carbodiimide, antiaging agent hindered amine antioxidant, antioxidant four (β-(3, 5 di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester was stirred in a dry high-speed mixer according to the proportioning to make it evenly mixed, and then reacted in a twin-screw extruder, the screw speed was 180rpm, extruded The output temperature is 270°C; the polylactic acid is blended and extruded with other materials by side forced feeding, and the product is air-cooled, pelletized, and vacuum-dried to obtain a toughened and heat-resistant polylactic acid masterbatch.

[0023] Wherein, weight percent: polylactic acid content is 35%, heat-resistant type artificial polymer polycarbonate content is 44%, polymethyl methacrylate content is 1...

Embodiment 2

[0025] (1) Vacuum dry polylactic acid, polyoxymethylene, and ACR at 70°C for 5 hours to remove moisture;

[0026] (2) Combine the above-mentioned dried polyoxymethylene and ACR with hydrolysis inhibitor DCC, anti-aging agent hindered phenolic antioxidant, antioxidant (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid The octadecyl ester is stirred in a dry high-speed mixer according to the proportion to make it evenly mixed, and then reacted in a twin-screw extruder, the screw speed is 100rpm, the extrusion temperature is 180°C, and the polylactic acid is forced to feed from the side It is blended and extruded with other materials, and the product is air-cooled, pelletized, and vacuum-dried to obtain a toughened and heat-resistant polylactic acid masterbatch.

[0027] Wherein, weight percentage: wherein polylactic acid content is 48%, heat-resistant type artificial polymer POM content is 42%, toughening agent ACR content is 8%, hydrolysis inhibitor DCC content is 0.8%, hindere...

Embodiment 3

[0029] (1) Vacuum dry polylactic acid, nylon 6, and SEBS at 80°C for 3 hours to remove moisture;

[0030] (2) Combine the above-mentioned dried nylon 6 and SEBS with hydrolysis inhibitor TIC, anti-aging agent benzotriazole light stabilizer, antioxidant β-(3,5-di-tert-butyl-4-hydroxybenzene Base) Cyclohexyl propionate was stirred in a dry high-speed mixer according to the ratio to make it evenly mixed, and then reacted in a twin-screw extruder with a screw speed of 25rpm and an extrusion temperature of 250°C. Polylactic acid was taken from the side Compulsory feeding and other materials are blended and extruded, and the product is water-cooled, pelletized, and vacuum-dried to obtain toughened and heat-resistant polylactic acid masterbatches.

[0031] Percentage by weight: the content of polylactic acid is 70%, the content of heat-resistant artificial polymer PA6 is 21%, the content of toughening agent SEBS is 6%, the content of anti-aging agent benzotriazole light stabilizer is...

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Abstract

The invention discloses a high-toughness and highly heat-resistant polylactic acid (PLA) alloy material and a preparation method thereof. The material comprises the following components in part by weight: 10 to 80 parts of PLA, 10 to 80 parts of heat-resistant artificial macromolecules, 5 to 15 parts of toughening agent, 0.4 to 1 part of hydrolysis inhibitor, 0.1 to 1 part of anti-aging agent and 0.1 to 1 part of antioxidant. Compared with the prior art, the material has the advantages that: the toughness and heat resistance of a PLA composite material are improved simultaneously; blending modification which is an important way of polymer modification is simple and practicable and low in cost; and by a blending system, the performance of the components can be comprehensively balanced, the components are complemented, and the performance weakness of each single component is avoided, so that a polymer material with ideal comprehensive performance is obtained.

Description

technical field [0001] The invention belongs to a polymer material and a preparation method thereof, in particular to a polylactic acid alloy 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. In recent years, the application of PLA in the fields of automotive interior, textile, packaging and medicine has been greatly developed. Because of its non-toxicity, good biocompatibility, biodegradability and the final degradation product is CO 2 and H 2 O, and its properties can be adjusted in a wide range by methods such as copolymerization, blending, molecular modification, and compounding, has become one of the most valued materials currently. [0003] PLA has good strength and rigidity, but poor flexibility, impact performance and heat resistance. If it...

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
Inventor 张正光陈效华唐少俊
Owner CHERY AUTOMOBILE CO LTD
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