Nanoparticle-containing polypropylene inside-kettle alloy capable of being used for 3D printing, and preparation method and application thereof

A technology of nano-particles and alloys in kettles, applied in metal processing equipment, 3D object support structures, manufacturing tools, etc., can solve the problems of polypropylene degradation, difficulty, and micron-scale preparation

Active Publication Date: 2014-08-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for nanoparticle/polypropylene kettle alloy, on the one hand, repeated processing will lead to the degradation of polypropylene and its copolymer; on the other hand, the

Method used

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  • Nanoparticle-containing polypropylene inside-kettle alloy capable of being used for 3D printing, and preparation method and application thereof
  • Nanoparticle-containing polypropylene inside-kettle alloy capable of being used for 3D printing, and preparation method and application thereof

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preparation example Construction

[0084] 1. Preparation of Nanoparticle-supported Catalysts

[0085] The preparation steps of nanoparticle carrier type Ziegler-Natta catalyst:

[0086] The nanoparticle carrier type Ziegler-Natta catalyst used in the present invention is nanoparticle / internal electron donor / MgCl 2 / TiCl 4 The carrier type catalyst is characterized in that a diether or diester compound is used as an internal electron donor, and the diameter of the catalyst particle is 0.1-30 μm. Prepare as follows:

[0087] Weigh 10g anhydrous MgCl 2 Put it into a two-neck flask filled with argon gas and stir with a magnet, then add 47.8mL of isooctyl alcohol and 60mL of decane, slowly heat to 130°C while stirring, react at 130°C for 1h until the solution is clear, then cool to 60-80°C °C, add 2.10 g of phthalic anhydride, add 2 g of nanoparticles, and stir overnight until the solution is clear. Under an argon atmosphere, the TiCl 4Add 250 mL into a well-dried Schlenk reactor, cool down to -20°C, slowly ad...

Embodiment 1

[0105] Under normal temperature and pressure, 0.05MPa of H was introduced into the 2L polymerization reactor filled with propylene gas. 2 , add 300g of liquid propylene, 4ml of triethylaluminum solution (heptane solution with a concentration of 1.8mol / L) and 200mg of multi-walled carbon nanotubes / BMMF / MgCl 2 / TiCl 4 Carrier-type catalyst, the reactor is raised to 70°C for polymerization, after 60 minutes of reaction, the temperature of the polymerization reactor is lowered to room temperature, the residual gas in the polymerization reactor is vented, and then the mixed gas of ethylene and propylene (molar ratio 1 : 3), feed hydrogen 0.05g, pressure is 0.5MPa, be heated up to 80 ℃, react for 120min, take out the polymer that polymerization reaction obtains, vacuum-dry 6h, obtain the alloy powder in the polypropylene kettle of 200g gray carbon nanotubes .

[0106] In the obtained polypropylene kettle alloy containing carbon nanotubes, the content of carbon nanotubes is 0.1%, a...

Embodiment 2

[0108] Feed 0.2MPa of H into the 2L polymerization reactor filled with propylene gas under normal temperature and pressure. 2 , add 300g of liquid propylene, 5ml of triethylaluminum solution (heptane solution with a concentration of 1.8mol / L) and 200mg of montmorillonite BMMF / MgCl 2 / TiCl 4 Supported catalyst, the reactor is raised to 70°C for polymerization, after 30 minutes of reaction, the temperature of the polymerization reactor is lowered to room temperature, the remaining gas in the polymerization reactor is vented, and then the mixed gas of ethylene and 1-butene ( The molar ratio is 1:2), 0.05g of hydrogen gas is introduced, the pressure is 0.6MPa, the temperature is raised to 80°C, and the reaction is carried out for 30min. alloy powder.

[0109] In the obtained polypropylene kettle alloy containing montmorillonite, the content of montmorillonite is 0.12%, and the molecular weight of homopolypropylene is 2×10 5 g / mol, the molecular weight distribution is 8.0, the e...

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Abstract

The invention discloses a nanoparticle-containing polypropylene inside-kettle alloy capable of being used for 3D printing, and a preparation method and an application thereof. The nanoparticle-containing polypropylene inside-kettle alloy is obtained by utilizing a catalyst including a nanoparticle carrier-type catalyst and carrying out two-stage polymerization catalysis of propylene and ethylene/alpha-olefin; the alloy is granular in shape, and the particle diameter is 50-1000 [mu]m. Because the nanoparticle-containing polypropylene inside-kettle alloy has small and uniform particle morphology, the alloy can be directly used as a raw material of 3D printing by adding a heat stabilizer, and is especially suitable for 3D printing prepared nanoparticle-containing polypropylene inside-kettle alloy products which have high melt viscosity and are difficult to process and mold.

Description

technical field [0001] The present invention relates to a polypropylene kettle alloy containing nanoparticles that can be used for 3D printing and its preparation method and application, in particular to a polypropylene kettle alloy containing nanoparticles that can be used for 3D printing and is prepared by polymerization in a polymerization kettle. Alloys and their preparation methods and applications. Background technique [0002] Polypropylene is a general purpose resin with good insulation, processing and chemical resistance properties. However, the single and regular polymer chain structure endows polypropylene with high strength while greatly reducing its toughness, thus limiting its application in normal and low temperature environments. At present, it is common to toughen polypropylene by introducing rubber or elastomer in scientific research and industry. Copolymer polypropylene with high added value, such as polypropylene kettle alloy, has better performance tha...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/16C08L23/08C08F110/06C08F210/16C08F4/649C08F4/645C08F4/659C08F4/02C08K13/02C08K7/00C08K3/04C08K3/34C08K7/10C08K3/22C08K3/24C08K3/36
CPCB29C64/112C08F110/06C08F210/16C08K2201/011C08L23/12C08L2201/02C08L2201/08C08L23/14C08K13/04C08K7/24C08K5/1345C08K5/526C08K5/372C08L23/0815C08K13/02C08K3/346C08K3/04C08K7/10C08K2003/2275C08K3/22C08K2003/2224C08K3/36C08K2003/2227C08K2003/2241C08F4/6494C08F4/6455C08F4/659
Inventor 董金勇王宁牛慧秦亚伟李春成符文鑫林学春马永梅孙文华赵宁
Owner INST OF CHEM CHINESE ACAD OF SCI
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