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Ultrahigh-molecular-weight isotactic polypropylene resin for 3D printing, preparation method and application thereof

An ultra-high molecular weight, isotactic polypropylene technology, applied in the field of regular polypropylene resin, can solve problems such as difficulty in processing and molding

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

Difficulty in processing and molding is the bottleneck problem encountered in the development and application of ultra-high molecular weight isotactic polypropylene

Method used

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  • Ultrahigh-molecular-weight isotactic polypropylene resin for 3D printing, preparation method and application thereof
  • Ultrahigh-molecular-weight isotactic polypropylene resin for 3D printing, preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0082] 1. Preparation of supported metallocene catalysts

[0083] The supported metallocene catalyst used in the present invention is selected from SiO 2 A metallocene catalyst as a carrier, characterized in that the particle size of the catalyst particles is 0.1 to 30 μm, prepared by the following method:

[0084] Take 5.0g of SiO 2 The carrier (particle size 1-10 μm) was placed in a two-neck flask filled with argon and mechanically stirred, then 30 mL of toluene solution was added, the temperature was lowered to 0 °C, 20 mL of MAO solution (concentration was 1.4 mol / L) was slowly added, and continued After stirring the reaction for 12h, add 2.0g metallocene compound rac-(CH 3 ) 2 Si(2-CH 3 -4-Ph-Ind) 2 ZrCl 2 , Continue to stir the reaction for 3h. The reaction product was washed three times with toluene and hexane respectively, and dried in vacuum to obtain a supported metallocene catalyst A. The particle diameter of the catalyst is 1-10 μm.

[0085] Alternatively,...

Embodiment 1

[0094] In a 500ml dry polymerization reactor, first add 150ml dry hexane, then add 5ml methylaluminoxane solution (concentration: 1.4mol / L) and 20mg of catalyst A prepared above, and then feed propylene gas to 0.2 MPa, polymerized at 30°C. After 30 minutes of reaction, the pressure in the polymerization tank was emptied, and the polymerized product was collected. The product was washed three times with ethanol and deionized water, filtered, and dried to obtain 7.8 g of white ultra-high molecular weight isotactic polypropylene. resin powder.

[0095] The molecular weight of the obtained polypropylene resin is 2.61×10 6 g / mol, the isotacticity is 92%, the melting point of the polymer is 160.9°C, and the particle size of the polymer particles is 200-400 μm.

Embodiment 2

[0097] In a 500ml dry polymerization reactor, first add 150ml of dry hexane, and then add 1ml of (CPh 3 )[B(C 6 f 5 ) 4 ] (concentration is 1.0mol / L) and 20mg of the above-mentioned prepared catalyst A, then pass through propylene gas to 0.2MPa, carry out polymerization at 30 ℃, after reacting for 30 minutes, vent the pressure in the polymerization tank, collect the polymerization product, use respectively The product was washed three times with ethanol and deionized water, filtered, and dried to obtain 9.2 g of white ultrahigh molecular weight isotactic polypropylene resin powder.

[0098] The molecular weight of the obtained polypropylene resin is 4.10×10 6 g / mol, the isotacticity is 95%, the melting point of the polymer is 160.5°C, and the particle size of the polymer particles is 200-400 μm.

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Abstract

The invention discloses an ultrahigh-molecular-weight isotactic polypropylene resin for 3D printing, a preparation method and an application thereof. The ultrahigh-molecular-weight isotactic polypropylene resin has a molecular weight ranging from 1*10<6> to 5*10<6> g / mol, an isotacticity being more than 90% and a melting point being more than 160 DEG C. The ultrahigh molecular weight isotactic polypropylene is prepared from propylene by a polymerization reaction. A polymerization product is granular with granule sizes ranging from 50-1000 microns. Because the resin is small and uniform in particle form, the resin can be directly used as a raw material of 3D printing with addition of a thermal stabilizer and is especially suitable for moulding high-strength, high-impact-resistant and high-wear-resistant products through 3D printing.

Description

technical field [0001] The present invention relates to an ultra-high molecular weight isotactic polypropylene resin that can be used for 3D printing and its preparation method and application, in particular to an ultra-high molecular weight isotactic polypropylene resin that can be used for 3D printing and is directly prepared in a polymerization kettle. Its preparation method and application. Background technique [0002] Due to the advantages of low density, easy processing, good mechanical properties, non-toxicity and good chemical stability, isotactic polypropylene is widely used in construction, packaging, automobile, home appliance manufacturing and other fields. Isotactic polypropylene prepared by traditional methods usually has a molecular weight of less than 1 million, and can be made into various resin products under various processing conditions such as injection molding, blown film, and spinning. [0003] Ultra-high molecular weight polymers (such as isotactic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/646
Inventor 董金勇牛慧秦亚伟王宁李春成符文鑫林学春马永梅孙文华徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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