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Ultrahigh molecular weight functionalized isotactic polypropylene and preparation method thereof

An ultra-high molecular weight, isotactic polypropylene technology, applied in the production of bulk chemicals, etc., can solve the problems of inability to achieve high isotacticity and harsh polymerization conditions, and achieve the effect of easy industrialization and simple process

Pending Publication Date: 2022-08-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The development of ultra-high molecular weight polyethylene is in full swing, but there are few reports on polypropylene with a weight average molecular weight greater than 1 million, and sporadic reports are mostly limited by harsh polymerization conditions (such as Chem.Eur.J.2012,18,4174– 4178 obtains ultra-high molecular weight isotactic polypropylene, but requires high pressure and low temperature), and cannot achieve high isotacticity (such as Macromolecules 2011,44,1934–1941 obtained ultra-high molecular weight polypropylene under high pressure, but isotactic mm% less than 50%)

Method used

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  • Ultrahigh molecular weight functionalized isotactic polypropylene and preparation method thereof
  • Ultrahigh molecular weight functionalized isotactic polypropylene and preparation method thereof
  • Ultrahigh molecular weight functionalized isotactic polypropylene and preparation method thereof

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preparation example Construction

[0030] The present invention also provides a preparation method of ultra-high molecular weight functionalized isotactic polypropylene, comprising:

[0031] Under anhydrous and oxygen-free conditions, a solvent and a polar monomer of formula II structure are added into the reactor, the solvent is preferably toluene, then propylene gas is introduced, and after stirring and mixing evenly, a catalyst and a co-catalyst are added to react , the reaction temperature is preferably room temperature, and the reaction time is preferably 20-720 min. After the polymerization reaction is completed, the polymer is precipitated in the solvent, the solvent is preferably a hydrochloric acid / ethanol mixture, and then dried, the drying temperature is preferably 60°C, and the reaction time is preferably 24h, to obtain ultra-high molecular weight functionalization, etc. Regular polypropylene; the catalyst is a front transition metal alkyl compound; the equivalent of the polar monomer of the formula...

Embodiment 1

[0048] Under anhydrous and anaerobic conditions, feed 1 equivalent of phenol, 1.5 equivalents of 6-bromo-1-hexene, 3 equivalents of K to the reaction flask 2 CO 3 , 300 ml of N,N-dimethylformamide, reacted at 80 degrees Celsius for 12 hours, quenched with a saturated aqueous solution of ammonium chloride, extracted with dichloromethane to obtain an organic phase, spin-dried, and distilled under reduced pressure to obtain Purified polar monomer 4 (X=O).

[0049] Under anhydrous and oxygen-free conditions, put 145 ml of toluene solution into the reaction kettle, and add 100 equivalents of polar monomer 4 (X=O), then connect 1 atmosphere of propylene gas, and after magnetic stirring and mixing, put into the system 1 equivalent of catalyst and 1.05 equivalents of Ph 3 CB(C 6 F 5 ) 4 5 ml of mixed toluene solution. The polymerization was completed after 2 hours of magnetic stirring, the polymer was precipitated in the hydrochloric acid / ethanol mixed solution, and the polymer ...

Embodiment 2

[0051] Under anhydrous and anaerobic conditions, feed 1 equivalent of phenol, 1.5 equivalents of 6-bromo-1-hexene, 3 equivalents of K to the reaction flask 2 CO 3 , 300 ml of N,N-dimethylformamide, reacted at 80 degrees Celsius for 12 hours, quenched with a saturated aqueous solution of ammonium chloride, extracted with dichloromethane to obtain an organic phase, spin-dried, and distilled under reduced pressure to obtain Purified polar monomer 4 (X=O).

[0052] Under anhydrous and oxygen-free conditions, put 145 ml of toluene solution into the reactor, and add 500 equivalents of polar monomer 4 (X=O), then connect 1 atmosphere of propylene gas, and after magnetic stirring and mixing, put into the system 1 equivalent of catalyst and 1.05 equivalents of Ph 3 CB(C 6 F 5 ) 4 5 ml of mixed toluene solution. The polymerization was completed after 12 hours of magnetic stirring, the polymer was precipitated in the hydrochloric acid / ethanol mixed solution, and the polymer was dri...

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Abstract

The invention provides ultra-high molecular weight functionalized isotactic polypropylene and a preparation method thereof, and belongs to the field of functionalized polypropylene. The structural formula of the polypropylene is shown as a formula I. The invention also provides a preparation method of the ultra-high molecular weight functionalized isotactic polypropylene, which comprises the following steps: adding a solvent and a polar monomer with a structure shown as a formula II into a reaction kettle, then introducing propylene gas, stirring and mixing, then adding a catalyst and a cocatalyst, and reacting to obtain the ultra-high molecular weight functionalized isotactic polypropylene. The ultra-high molecular weight functionalized isotactic polypropylene is obtained; the catalyst is a pre-transition metal alkyl compound. The weight-average molecular weight of the ultrahigh molecular weight functionalized isotactic polypropylene obtained through polymerization exceeds 2 million, the polar monomer insertion rate is larger than 0.1 mol%, and the isotacticity reaches mmmmgt; 99%.

Description

technical field [0001] The invention belongs to the field of functionalized polypropylene, in particular to an ultra-high molecular weight functionalized isotactic polypropylene and a preparation method thereof. Background technique [0002] Polypropylene is the second largest general-purpose polyolefin variety in the world, and its application is especially dominated by isotactic polypropylene. High regularity often results in the best application characteristics. Traditional propylene homopolymers are limited by the inertness of saturated carbon-hydrogen bonds, and their surface energy is low and surface activity is poor, resulting in poor dyeability, adhesion, antistatic properties, and compatibility with other materials. The introduction of functional groups into the polymer chain through the copolymerization of propylene and polar monomers can greatly improve the surface properties of the polymer, and even impart some special properties. The development of ultra-high ...

Claims

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Application Information

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IPC IPC(8): C08F210/06C08F216/16C08F228/04C08F4/643
CPCC08F210/06C08F4/64144C08F216/165C08F2500/01C08F2500/15C08F228/04Y02P20/52
Inventor 简忠保周光淋穆红亮马欣
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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