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Polylactic acid/polycarbonate alloy material for 3D printing and preparation method thereof

A polycarbonate, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of limited compatibilization effect and large viscosity difference, achieve the effects of enriching varieties, promoting two-phase compatibility, and reducing volume shrinkage

Active Publication Date: 2015-06-10
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when polylactic acid and polycarbonate are melt blended, there is a large difference in viscosity between the two, and the transesterification reaction can only occur at the interface between the two phases, resulting in limited compatibilization effect.
[0006] At present, there are no 3D printing consumable products that use industrial-grade low-cost PC toughened and reinforced PLA to appear in the domestic and foreign markets, indicating that this type of material has particularities in the field of 3D printing, such as alloy material processability and thermal stability. , shrinkage rate and molding precision, etc.

Method used

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  • Polylactic acid/polycarbonate alloy material for 3D printing and preparation method thereof
  • Polylactic acid/polycarbonate alloy material for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) 80 parts by weight of polylactic acid (poly-L-type lactic acid), 20 parts by weight of polycarbonate, 1.2 parts by weight of 2,6-dihydroxybenzoic acid, and 1.5 parts by weight of tetrabutyl titanate in a high-speed mixer (high-speed mixer The rotating speed is 750r / min) and mixed for 8 minutes. After mixing evenly, the mixture is obtained; the mixture is extruded in a twin-screw extruder, pelletized, and dried (the drying temperature of the pellets is 80°C) to the moisture content If it is lower than 0.3%, pellets are obtained; the screw speed of the twin-screw extruder is 400r / min; °C, 225 °C.

[0041] 2) all above-mentioned pellets and 0.8 weight part p-toluene diisocyanate, 3 weight parts tributyl citrate and 1.5 weight part phenyl salicylate, 0.3 weight part antioxidant 1010 in high-speed mixer (high-speed mixer The rotation speed is 750r / min) and mixed for 5 minutes, and after mixing evenly, the mixture is obtained; the mixture is extruded and drawn in a twin-s...

Embodiment 2

[0044] 1) 70 parts by weight of polylactic acid (poly-L-type lactic acid), 30 parts by weight of polycarbonate, 0.9 parts by weight of 3-aminoisoxazole, and 1.5 parts by weight of isobutyl titanate in a high-speed mixer (the speed of the high-speed mixer 750r / min) and mixed for 8 minutes, after mixing evenly, the mixture was obtained; the mixture was extruded in a twin-screw extruder, granulated, and dried (drying temperature was 80°C) until the moisture content was lower than 0.3%. The pellets were obtained; the screw speed of the twin-screw extruder was 300r / min; the temperature settings of zone I, zone II, zone III and zone IV of the extruder were: 205°C, 220°C, 235°C, 230°C.

[0045] 2) All above-mentioned pellets and 2 parts by weight of resorcinol diglycidyl ether, 2 parts by weight of 9,10-epoxy octyl stearate and 2.5 parts by weight of butyl benzoate, 0.2 parts by weight of antioxidant 1010 in Mix in a high-speed mixer (the speed of the high-speed mixer is 750r / min) fo...

Embodiment 3

[0048] 1) 60 parts by weight of polylactic acid (poly-L-type lactic acid), 40 parts by weight of polycarbonate, 0.7 parts by weight of 2-thiophene acetyl chloride, and 1 part by weight of tetrabutyl titanate in a high-speed mixer (the rotating speed of the high-speed mixer is 750r / min) for 8 minutes, after mixing evenly, put the mixture in a twin-screw extruder to extrude, make material, dry (the drying temperature is 80°C) until the moisture content is lower than 0.3%, and obtain pellets ; wherein the screw speed of the twin-screw extruder is 500r / min; the temperature settings of the extruder I, II, III, and IV are: 205°C, 220°C, 235°C, 230°C.

[0049] 2) All the above-mentioned pellets and 1.5 parts by weight of diphenylmethane diisocyanate, 4 parts by weight of octyl soyate and 3 parts by weight of phenyl salicylate, 0.3 parts by weight of antioxidant 168 in a high-speed mixer (high-speed The rotation speed of the mixer is 750r / min) and mixed for 5 minutes, and after mixing...

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Abstract

The invention belongs to the technical field of a macromolecular material and discloses a polylactic acid / polycarbonate alloy material for 3D printing and a preparation method thereof. The alloy material is prepared from the following components in parts by weight: 60-95 parts of polylactic acid, 5-40 parts of polycarbonate, 0.5-2 parts of end-group modifier, 0.5-5 parts of ester exchanger, 0-10 parts of chain extender, 1-20 parts of plasticizer and 0.1-2 parts of antioxidant. By adopting a two-step blending and modifying method, the mutual dissolution of polylactic acid and polycarbonate is promoted, the thermal stability and machinability of the alloy material are improved and the volume shrinkage of the material is reduced. The alloy material has the advantages of being low in cost and high in performance, can be applied to a 3D printing process and enriches the varieties of 3D macromolecular materials.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polylactic acid / polycarbonate alloy material for 3D printing and a preparation method thereof. Background technique [0002] 3D printing, also known as additive manufacturing, is a type of rapid prototyping technology. The principle is to obtain a digital model through computer modeling or scanning the prototype, then decompose the three-dimensional model into multi-layer two-dimensional cross-sectional data, and then print the material layer by layer through software and numerical control system, and finally form a three-dimensional entity. As the core technology to promote the tertiary industry revolution, 3D printing has the characteristics of networking, digitization, and personalization, and has a wide range of applications in the fields of national defense, aerospace, industrial model design, product prototype design, and biomedicine. The mainstream...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L69/00C08K5/00C08K5/12C08K5/101C08K5/1515C08K5/11B29C47/92B33Y70/00B29C48/92
Inventor 蒋灿郑华德李艳辉黄淼俊朱祎纬石川
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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