Functional isotactic polypropylene and preparation method thereof

An isotactic polypropylene and functional technology, applied in the field of polypropylene, can solve problems such as low melting temperature and irregular molecular chain structure, and achieve the effects of good tolerance, good copolymerization ability and high regioselectivity

Inactive Publication Date: 2014-01-01
应忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the content of halogen groups in the copolymer obtained by the metallocene catalyst system can reach a high level, the molecular weight of the polymer is less than 20kg·mol -1 , and due to the structural units inserted in different ways and the double bonds produced by β-hydrogen or halogen elimination reactions, the molecular chain structure of the polymer is irregular and the melting temperature is low

Method used

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  • Functional isotactic polypropylene and preparation method thereof
  • Functional isotactic polypropylene and preparation method thereof
  • Functional isotactic polypropylene and preparation method thereof

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preparation example Construction

[0040] The present invention also provides a preparation method for the functional isotactic polypropylene, comprising:

[0041] Under the action of a catalyst and a cocatalyst, propylene and a halogenated olefin having a structure of formula (III) are polymerized in an inert solvent to obtain functional isotactic polypropylene; the catalyst is a dimethylformaldehyde having a structure of formula (IV) Basepyridylamine hafnium complex, the cocatalyst is triphenylcarbon tetrakis (pentafluorophenyl) borate;

[0042]

[0043] Wherein, x is a halogen;

[0044] y is 1-16.

[0045] R 1 , R 2 with R 3 each independently selected from hydrogen or different alkyl groups of C1-C10.

[0046] In the process of preparing functional isotactic polypropylene, the catalyst is a hafnium lutidine amine complex and the co-catalyst is triphenylcarbon tetrakis (pentafluorophenyl) borate catalyst system to catalyze the reaction of propylene with the formula ( Ⅲ) Structure olefins, that is, t...

Embodiment 1

[0060] Under propylene atmosphere, 30mL anhydrous toluene, 7.4mmol11-iodo-1-undecene and 1.0mL cleaning agent triisobutylaluminum (Al( i Bu) 3 ) in toluene solution (0.5M), stirred at 25°C for 10min, then added 5μmol of catalyst dimethylpyridinium hafnium complex (R 1 , R 2 with R 3 Both are isopropyl) and 10 μmol cocatalyst triphenylcarbon tetrakis (pentafluorophenyl) borate ([Ph 3 C][B(C 6 f 5 ) 4 ])) mixture to initiate the reaction, the total solution volume is 40mL, continue to pass through propylene and keep the pressure of propylene at 1 atmosphere, after 10 minutes of reaction, pour the reaction solution into the ethanol solution containing 10% (V / V) hydrochloric acid, and a large amount of White polymer; the product obtained by filtration was washed 3 times with acetone and then dried in a vacuum oven at 60°C for 24 hours, and weighed to obtain 0.32g of polymer. The catalytic activity of the polymer was 3.80×10 5 g / mol Hf h, the relative weight average molecul...

Embodiment 2

[0062] Under a propylene atmosphere, 30 mL of anhydrous toluene, 3.7 mmol of 11-iodo-1-undecene and 1.0 mL of Al( i Bu) 3 Toluene solution (0.5M), after stirring at 25°C for 10min, add 5μmol of catalyst dimethylpyridinium hafnium complex (R 1 , R 2 with R 3 Both are isopropyl) and 10 μmol cocatalyst triphenylcarbon tetrakis (pentafluorophenyl) borate ([Ph 3 C][B(C 6 f 5 ) 4 ])) mixture to initiate the reaction, the total solution volume is 40mL, continue to pass through propylene and keep the pressure of propylene at 1 atmosphere, after 10 minutes of reaction, pour the reaction solution into the ethanol solution containing 10% (V / V) hydrochloric acid, and a large amount of White polymer; the product obtained by filtration was washed 3 times with acetone and then dried in a vacuum oven at 60°C for 24 hours, and weighed to obtain 0.5g of polymer. The catalytic activity of the polymer was 6.00×10 5 g / mol Hf h, the relative weight average molecular weight is 130kg / mol, and...

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Abstract

The invention provides functional isotactic polypropylene and a preparation method thereof. The functional isotactic polypropylene is prepared through polymerizing polymerization monomers including propylene and terminal-halogenated 1-olefin under the action of a catalyst and a catalyst promoter, wherein the catalyst is a dimethyl pyridine amine-hafnium complex, and the catalyst promoter is triphenylmethyl tetrakis-(pentafluorophenyl)-borate. The catalytic systems of the catalyst and the catalyst promoter have high three-dimensional regioselectivity for the polymerization monomers and have excellent copolymerization capacity for long-chain halogenated 1-olefin, so that the prepared functional isotactic polypropylene has relatively high regularity and high isotacticity ([mmmm]) of over 99%.

Description

technical field [0001] The invention relates to the technical field of polypropylene, in particular to a functional isotactic polypropylene and a preparation method thereof. Background technique [0002] Polypropylene is a thermoplastic resin obtained by polymerizing propylene. According to the arrangement of methyl groups, polypropylene can be divided into isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene. When the methyl groups are arranged on the same side of the molecular main chain, it is called isotactic polypropylene; if the methyl groups are arranged randomly on both sides of the molecular main chain, it is called atactic polypropylene; when the methyl groups are arranged alternately on both sides of the molecular main chain, it is called interstitial polypropylene. Regular polypropylene. Isotactic polypropylene is one of the most widely used and fastest growing resins in the world. Compared with other thermoplastic resins, it has the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/06C08F214/16C08F214/14C08F4/659
Inventor 王晓艳李彦国李悦生
Owner 应忠
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