Polypropylene-polyester-carbon nano tube ternary composite alloy and preparation method thereof

A technology of carbon nanotubes and ternary composites, which is applied in the cross field of polymers and nanomaterials, can solve the problems of phase instability, phase domain increase, and low cohesion

Inactive Publication Date: 2015-11-04
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this ternary blend is thermodynamically incompatible due to the substantial difference in interfacial energy between the polymer and carbon nanotubes and between polypropylene and polycaprolactone, and the mutual adhesion is very low. , during the process of processing, carbon nanotubes migrate and aggregate, and the flow of two polymer phases increases the unst

Method used

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  • Polypropylene-polyester-carbon nano tube ternary composite alloy and preparation method thereof
  • Polypropylene-polyester-carbon nano tube ternary composite alloy and preparation method thereof
  • Polypropylene-polyester-carbon nano tube ternary composite alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] 1) Add 300g of liquid propylene into the reactor, add 0.019mol of triethylaluminum and 0.029mol of methylalumoxane as cocatalysts and 1.0g of bifunctional carbon nanotubes (MgCl 2 / BMMF / TiCl 4 Catalyst system) (in the cocatalyst, the molar ratio between the aluminum element in triethylaluminum and the transition metal element titanium in the catalyst is 50:1; The molar ratio of transition metal element zirconium is 2000:1, the molar ratio between aluminum and transition metal element (titanium+zirconium) in the cocatalyst is 120:1), and 0.2g of hydrogen is introduced, and the pressure is 3.0MPa , the temperature was raised to 70° C., and the reaction was carried out for 0.5 hours to obtain 90.0 g of an intermediate product polymer. The obtained intermediate product (polypropylene / carbon nanotube composite material) was treated with acid alcohol (20% hydrochloric acid) (the volume ratio of hydrochloric acid to ethanol was 1:5). The product was washed with ethanol and d...

Embodiment 2

[0101] Add 1 g of the acid-alcohol-treated intermediate product obtained in Example 1 and 10 ml of toluene into a 100 ml dry flask equipped with a magnet, and pump and dry in an oil bath at 50° C. for 4 hours. Warming up to 80°C, stirring at 80°C for 4h. The temperature was raised to 130° C., 0.03 ml of stannous octoate was added, and 30 ml of caprolactone monomer started to react, and the stirring reaction was continued for 24 hours. The product was washed 4 times with excess tetrahydrofuran and filtered using a Φ0.22 μm polytetrafluoroethylene membrane until the filtrate was poured into ice methanol and no precipitation appeared, then washed with distilled water and ethanol in turn, filtered, and dried at 40°C until constant Weight, finally obtained polypropylene-polycaprolactone-carbon nanotube ternary alloy 1.2g.

[0102] The polypropylene-polycaprolactone-carbon nanotube ternary alloy is composed of carbon nanotubes, homopolymerized polypropylene resin and homopolymerize...

Embodiment 3

[0104] Add 1 g of the acid-alcohol-treated intermediate product obtained in Example 1 and 10 ml of toluene into a 250 ml dry flask equipped with a magnet, and pump and dry in an oil bath at 50° C. for 4 hours. Raise the temperature to 80°C and stir at 80°C for 4h. The temperature was raised to 130° C., 1.0 ml of stannous octoate was added, and 100 ml of caprolactone monomer started to react, and the stirring reaction was continued for 24 hours. The product was washed 4 times with excess tetrahydrofuran and filtered using a Φ0.22 μm polytetrafluoroethylene membrane until the filtrate was poured into ice methanol and no precipitation appeared, then washed with distilled water and ethanol in turn, filtered, and dried at 40°C until constant Weight, finally obtained polypropylene-polycaprolactone-carbon nanotube ternary alloy 1.3g.

[0105] The polypropylene-polycaprolactone-carbon nanotube ternary alloy is composed of carbon nanotubes, homopolymerized polypropylene resin and homo...

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Abstract

The invention provides polypropylene-polyester-carbon nano tube ternary composite alloy and a preparation method thereof. The preparation method includes the steps that 1, an alkene monomer, dual-functional carbon nano tubes and a promoter are used for undergoing an in-situ coordination polymerization reaction, so that an intermediate product is obtained, wherein the alkene monomer comprises a propylene monomer and a mixture of the propylene monomer and ethylene and/or 1-butene; 2, the intermediate product is subjected to acid alcohol treatment, hydroxyl used for modifying a polyolefin catalyst is made to be recovered, in the existence of the catalyst system, the recovered hydroxyl is used as an initiator to trigger ring-opening polymerization of cyclic ester monomers, and accordingly the polypropylene-polyester-carbon nano tube ternary composite alloy is obtained. According to the polypropylene-polyester-carbon nano tube ternary composite alloy and the preparation method thereof, polypropylene and polycaprolactone are used for establishing strong interfacial force through the chemical attachment of the carbon nano tubes, and the polycaprolactone and the carbon nano tubes are stably dispersed in a polypropylene matrix at the same time. The polypropylene has a good mechanical property and a good thermal property, has good wettability, printing and dyeing properties and the compatibility with other polar polymers, and further has certain biocompatibility, and thus the polypropylene is turned into a high performance resin material with excellent overall performance.

Description

technical field [0001] The invention belongs to the cross technical field of polymers and nanometer materials, and in particular relates to a polypropylene-polyester-carbon nanotube ternary composite alloy and a preparation method thereof. Background technique [0002] Polypropylene is an important general-purpose resin, which has the characteristics of high cost performance, good mechanical properties, stable thermal properties, good insulation, and excellent processing performance. It is widely used in various fields such as industry, agriculture, medical care, military and daily life. field. However, polypropylene is a non-polar polymer and lacks polar functional groups in its chemical structure, thus limiting its application in many fields. In order to overcome this shortcoming, it is an important and effective way to introduce polar polymers with functional groups into polypropylene to form alloy materials. Such as adding polyethylene terephthalate (PET) can improve t...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L23/12C08K7/00C08K3/04C08F110/06C08F4/649C08F4/02C08G63/08
Inventor 董金勇刘源王宁
Owner INST OF CHEM CHINESE ACAD OF SCI
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