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

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

Example Embodiment

[0039] Example 1

[0040] 1) 80 parts by weight of polylactic acid (poly L-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 were placed in a high-speed mixer (high-speed mixer). The rotating speed is 750r / min) and mixed for 8 minutes, and after the mixing is uniform, the mixture is obtained; the mixture is placed in a twin-screw extruder for extrusion, granulation, and drying (the temperature of pellet drying is 80 ° C) to moisture content Below 0.3%, pellets are obtained; wherein the screw speed of the twin-screw extruder is 400 r / min; the temperatures of the extruder zone I, zone II, zone III, and zone IV are set as follows: 200 ° C, 215 ° C, 230 ° C °C, 225 °C.

[0041] 2) above-mentioned all pellets and 0.8 parts by weight of p-toluene diisocyanate, 3 parts by weight of tributyl citrate and 1.5 parts by weight of phenyl salicylate, 0.3 parts by weight of antioxidant 1010 were ...

Example Embodiment

[0043] Example 2

[0044] 1) 70 parts by weight of polylactic acid (poly-L-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 are placed in a high-speed mixer (the rotating speed of the high-speed mixer). 750r / min) for 8 minutes, and after mixing uniformly, the mixture was obtained; the mixture was extruded and pelletized in a twin-screw extruder, and dried (the drying temperature was 80° C.) to a moisture content of less than 0.3%, The pellets were obtained; the screw speed of the twin-screw extruder was 300 r / min; the temperatures of the extruder zones I, II, III, and IV were set as: 205°C, 220°C, 235°C, and 230°C.

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

Example Embodiment

[0047] Example 3

[0048] 1) 60 parts by weight of polylactic acid (poly L-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 are placed in a high-speed mixer (the rotating speed of the high-speed mixer is 750r / min) for 8 minutes, after mixing evenly, the mixture is placed in a twin-screw extruder to extrude, make materials, and dry (the drying temperature is 80°C) to a moisture content of less than 0.3% to obtain pellets ; The screw speed of the twin-screw extruder is 500r / min; the temperature of the extruder zone I, II, III and IV are set as: 205°C, 220°C, 235°C, and 230°C.

[0049] 2) above-mentioned all pellets and 1.5 parts by weight of diphenylmethane diisocyanate, 4 parts by weight of octyl epoxidized soybean oleate and 3 parts by weight of phenyl salicylate, 0.3 parts by weight of antioxidant 168 are placed in a high-speed mixer (high-speed mixer). The rotating speed of the...

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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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