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Method of preparing telechelic polymer

A technology of telechelic polymer and macromolecular polymer, which is applied in the field of polymers to achieve significant social and economic benefits and potential application prospects.

Active Publication Date: 2012-07-11
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

However, there is no report on the preparation of telechelic polymers by macromolecular chain scission reaction in the prior art

Method used

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  • Method of preparing telechelic polymer
  • Method of preparing telechelic polymer
  • Method of preparing telechelic polymer

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preparation example Construction

[0026] The invention discloses a preparation method of a telechelic polymer, comprising the following steps: mixing a metal-organic compound with a macromolecular polymer containing a carbon-carbon double bond in the main chain, and obtaining a telechelic polymer after a chain scission reaction. The above preparation process As follows:

[0027]

[0028] The macromolecular polymer used in the present invention is compound 1, a class of macromolecules with carbon-carbon double bonds in the main chain. There is no requirement for molecular weight and molecular weight distribution, and the content of unsaturated carbon-carbon double bonds in the main chain can be 0.2%. ~50% (based on the number of carbon-carbon bonds in the main chain). Described macromolecule polymer is preferably polybutadiene, polyisoprene or the copolymer (styrene-butadiene rubber) of butadiene and styrene, the simultaneously cross-linked polybutadiene, polyisoprene and cross-linked Styrene-butadiene rubb...

Embodiment 1

[0041] 100 parts by weight of linear polybutadiene (molecular weight is 200kDa), 30 parts by weight of dicyclopentadiene zirconium hydrochloride, mixed in tetrahydrofuran solution, stirred at room temperature for 30 minutes;

[0042] The telechelic polymer was obtained after precipitating with ethanol. Gel permeation chromatography test showed that all polybutadiene molecules were broken. The molecular weight of the obtained telechelic polymer was 2000 Da, and the molecular weight distribution index was 1.5.

[0043] The telechelic polymer prepared in the present embodiment was analyzed by gel permeation chromatography, and the results were as follows: figure 1 shown.

[0044] Carry out nuclear magnetic resonance analysis to the telechelic polymer prepared in this embodiment, figure 2 H NMR spectrum of the telechelic polymer prepared for this example.

[0045] The reaction raw materials used in this embodiment and the products generated are shown in Table 1.

Embodiment 2

[0047] 100 parts by weight of linear polyisoprene (molecular weight is 660kDa), 30 parts by weight of dicyclopentadiene zirconium hydrochloride, mixed in tetrahydrofuran solution, stirred at room temperature for 10 hours;

[0048] The telechelic polymer was obtained after precipitation with ethanol, and gel permeation chromatography test showed that all polyisoprene chain scission occurred, the molecular weight of the obtained telechelic polymer was 10kDa, and the molecular weight distribution index was 2.

[0049] The telechelic polymer prepared in the present embodiment was analyzed by gel permeation chromatography, and the results were as follows: image 3 shown.

[0050] The reaction raw materials used in this embodiment and the products generated are shown in Table 1.

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Abstract

The invention discloses a method of preparing a telechelic polymer. The method comprises the following steps: mixing a metallorganic compound with a macro-molecule polymer having a main chain containing a carbon-carbon double bond, and obtaining a telechelic polymer after broken chain reaction. As compared with the prior art, through the principle of metallorganic compound activation carbon-carbon bond reaction, a telechelic polymer with an end having a responsive function group is obtained via carbon-carbon bond breaking by the metallorganic compound and the macro-molecule polymer, a method is provided for recovery of high added value of a waste high-molecular polymer, important meanings are exhibited for recovery and treatment of crosslinking rubber and waste tires, and a potential application prospect and remarkable social and economic benefits are presented. The result of an experiment shows that the molecular weight of the telechelic polymer prepared by the method is 500Da~10kDa, the molecular weight distribution index ranges from 1.5 to 5, and the functionality is from 1%~99%.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a preparation method of a telechelic polymer. Background technique [0002] Oligomers with reactive functional groups at the end are called telechelic polymers, also known as telechelic polymers. They are important intermediates for the preparation of polymer materials and are widely used in polymer block synthesis and oligomer model design. , has an important position in the fields of liquid rubber, coatings and adhesives. The reactive groups at the end of telechelic polymers mainly include hydroxyl, carboxyl, isocyanic acid, halogen and amino, etc. Among them, the telechelic polymer with two terminal groups of carboxyl and hydroxyl is more practical. [0003] Polybutadiene-based telechelic polymers are mainly prepared by polymerization, for example, by selecting a suitable end-capping agent and using an anionic polymerization method, which has been widely used in industrial p...

Claims

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Application Information

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IPC IPC(8): C08F8/50C08F136/06C08F136/08C08F236/10
Inventor 唐涛郑君王艳辉邢海平
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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