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Polycarbonate modified material for 3D printing, printing filament and preparation method thereof

A polycarbonate, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of warping of printed products, poor adhesion of the bottom plate, affecting 3D printing molding and product appearance, etc.

Active Publication Date: 2021-05-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of 3D printing, due to the high glass transition temperature of PC, there is serious warping when printing products, and the poor adhesion of the bottom plate seriously affects the molding and product appearance of 3D printing.

Method used

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  • Polycarbonate modified material for 3D printing, printing filament and preparation method thereof
  • Polycarbonate modified material for 3D printing, printing filament and preparation method thereof
  • Polycarbonate modified material for 3D printing, printing filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Polycarbonate (PC) used in the present invention is produced by Saudi Basic Industries Corporation, and the trade mark is LEXAN TM Resin HF1130-111. Polybutylene adipate terephthalate (PBAT) is produced by German BASF company, the brand is F BX-7011. The two particles were dried in a vacuum oven at 60°C for 4 hours in advance to remove moisture. Then mix in a bread machine according to the specific ratio of PC / PBAT 95 / 5,90 / 10,80 / 20 according to the ratio of mass and number, and the mixing time is 20min. PolyLab HAAKE Rheomex OS PTW16 co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio L / D=40) of PolyLab HAAKE Rheomex OS PTW16 from American ThermoFisher Technology Co., Ltd. The extruder has 11 sections from the feed port to the die, numbered 1-11, and the first section only plays the role of feeding and cannot be heated. The temperatures of sections 2-11 of the extruder are respectively: 210°C, 220°C, 230°C, 230°C, 230°C, 230°C, 230°C, 23...

Embodiment 2

[0063] Used nano-calcium carbonate in the present invention is produced by Shanghai Yuantai Chemical Products Co., Ltd., and the trade mark is nano-calcium carbonate, and particle diameter is 40-60nm. Manually add nano-calcium carbonate to the mixture of PC / PBAT 80 / 20 according to the ratio of 3 parts, 5 parts and 10 parts, and add 0.8 parts, 1.2 parts, and 3 parts of white oil respectively to help the nanoparticles in the polymer particle To disperse and adsorb on the surface of the material, put the above blend into a bread machine for stirring and mixing, and the stirring time is 20 minutes. After mixing evenly, the PolyLab HAAKE Rheomex OS PTW16 co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio L / D=40) of American ThermoFisher Technology Co., Ltd. was used to extrude and granulate. The extruder has 11 sections from the feed port to the die, numbered 1-11, and the first section only plays the role of feeding and cannot be heated. The temperature...

Embodiment 3

[0065] Above all 6 kinds of particles, and raw material PC, PBAT have carried out differential scanning calorimetry (DSC) test according to the step described above, cooling curve ( figure 1 ,2 on the left) and the second heating curve ( figure 1 , 2, right). The crystallization temperature ("T c ”), melting temperature (“T m ”), glass transition (“T g ”), and other information, the values ​​are listed in Table 2.

[0066] Table 1 shows the thermal performance parameters of each particle obtained from the DSC results.

[0067] sample T c (℃)

T m (℃)

T g (℃)

PC - - 144.5 PC / PBAT 95 / 5 - - 126.1 PC / PBAT 90 / 10 - - 116.2 PC / PBAT 80 / 20 - - 86.7 PBAT 84.4 133.2 -30.2 PC / PBAT 80 / 20-3CaCO 3

- - 88.2 PC / PBAT 80 / 20-5CaCO 3

93.0 PC / PBAT 80 / 20-10CaCO 3

96.7

[0068] from figure 1 And in Table 1, we can see that PC and PBAT have good compatibility, only one glass transition temperatu...

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Abstract

The invention relates to a 3D printing polycarbonate modified material, a printing thread and a preparation method thereof, and mainly solves the problem that polycarbonate has a high glass transition temperature, is easy to warp, and is not suitable for 3D printing applications. The invention relates to a 3D printing polycarbonate modified material, a printing thread and a preparation method thereof, and mainly solves the problem that polycarbonate has a high glass transition temperature, is easy to warp, and is not suitable for 3D printing applications. By using polycarbonate modified material for 3D printing, the material includes the following components in parts by weight: (1) 60 to 95 parts of polycarbonate; (2) 4 to 25 parts of aliphatic aromatic copolymer (3) 0.5 to 10 parts of inorganic nanoparticles; (4) 0.5 to 5 parts of processing aids; it is characterized in that the warpage of the 3D printing sample of the polycarbonate modified material is less than 0.5m ‑1 The technical solution solves this problem well and can be used in 3D printing industrial applications.

Description

technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a 3D printing modified polycarbonate material with good printing performance and a preparation method thereof. [0002] technical background [0003] 3D printing belongs to the additive technology of rapid prototyping technology. It is a technology based on digital model files to prepare 3D block materials by printing materials layer by layer. After nearly 30 years of development, 3D technology has been considered as one of the core technologies to change laboratory and industrial production methods. Currently commonly used 3D printing technologies mainly include Stereolithography, Inkjet Printing, Selective Laser Sintering, Fused Deposition Modeling, etc. [Analytical Chemistry2014,86(7),3240-3253.] [0004] As a commonly used 3D printing technology, fused deposition modeling mainly melts thermoplastics by heating, extruding them at the nozzle, and solidifying them la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L67/02C08K3/26
CPCB33Y70/00C08K2003/265C08K2201/011C08L69/00C08L67/02C08K3/26
Inventor 况军王洪学
Owner CHINA PETROLEUM & CHEM CORP