Preparation method of end group functionalized hyperbranched polyolefin

A polyolefin and functional polymer technology, applied in the field of polyolefin synthesis, can solve the problems of increased synthesis process, practical application limitations, limited group types, etc., and achieve the effect of improving production capacity

Active Publication Date: 2021-08-24
上海零号源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of terminal functionalized hyperbranched polymers still faces many difficulties: restricted by the reaction principle, the types of groups that can be introduced are limited; the target product can be obtained by modifying the terminal groups of hyperbranched polymers, which further increases the synthesis process.
Therefore, the practical application of this polymer material is greatly limited.

Method used

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  • Preparation method of end group functionalized hyperbranched polyolefin
  • Preparation method of end group functionalized hyperbranched polyolefin
  • Preparation method of end group functionalized hyperbranched polyolefin

Examples

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Effect test

Embodiment 1

[0037] This example relates to a method for synthesizing end group-functionalized hyperbranched polyolefins with controllable branching degree and controllable end group types. The synthesis route is as follows: figure 1 As shown, it specifically includes the following steps:

[0038] Take 3-allyl-cyclooctene (1mmol in 1ml tetrahydrofuran), put it in a 2ml sample bottle, add Hoveyda-Grubbs second-generation catalyst (3.13mg, dissolved in 20μL tetrahydrofuran) and chain transfer agent cis-2 -Butene-1,4-diol (4.41mg, dissolved in 20μL THF), reacted under argon for 24h (reaction temperature was 50°C), and then added vinyl ether / THF solution (v:v=50% )0.5ml to terminate the reaction, the product structure is as figure 2 Shown: n is 8, m is 1, the conversion rate of the monomer is 54.8%, and the branching degree of the product is 29.9%.

Embodiment 2

[0040]This example relates to a method for synthesizing end group-functionalized hyperbranched polyolefins with controllable branching degree and controllable end group types. The synthesis route is as follows: figure 1 As shown, it specifically includes the following steps:

[0041] Take 3-allyl-cyclooctene (1mmol in 1ml tetrahydrofuran), put it in a 2ml sample bottle, add Grubbs third-generation catalyst (4.42mg, dissolved in 20μL tetrahydrofuran) and chain transfer agent cis-2-butane Alkene-1,4-diol (4.41 mg, dissolved in 20 μL THF) was reacted under argon for 24 h (reaction temperature was 25° C.), and then vinyl ether / THF solution (v:v=50%) 0.5 ml to terminate the reaction, the product structure is as follows image 3 Shown: n is 10, m is 1, the conversion rate of the monomer is 42.6%, and the branching degree of the product is 14.9%.

Embodiment 3

[0043] This example relates to a method for synthesizing end group-functionalized hyperbranched polyolefins with controllable branching degree and controllable end group types. The synthesis route is as follows: figure 1 As shown, it specifically includes the following steps:

[0044] Take 3-allyl-cyclooctene (1mmol in 1ml THF), put it in a 2ml sample bottle, add Grubbs second-generation catalyst (4.43mg, dissolved in 20μL THF) and chain transfer agent maleic acid (17.41 mg, dissolved in 100 μL tetrahydrofuran), reacted under argon for 24h (reaction temperature was 50°C), then added 0.5ml of vinyl ether / tetrahydrofuran solution (v:v=50%) to terminate the reaction, and the product structure was as follows Figure 4 Shown: n is 6, m is 1, the conversion rate of the monomer is 91.8%, and the branching degree of the product is 15.0%.

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Abstract

The invention relates to a preparation method of terminal group functionalized hyperbranched polyolefin. The preparation method comprises the following steps: taking 3-allyl-cyclooctene as a monomer, introducing a plurality of olefins with terminal functional groups as chain transfer agents, and directly obtaining end group functionalized polyolefin through simultaneous occurrence of ring-opening metathesis polymerization reaction and cross metathesis reaction in the presence of a plurality of Grubbs catalysts. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the preparation of hyperbranched polyolefin and the functionalization of the end group of the hyperbranched polyolefin can be simultaneously realized through a one-pot method; and the reaction conversion rate, the product structure, the type and number of end group units and the like are controlled by means of catalyst selection, monomer concentration change, chain transfer agent type and concentration change, reaction temperature and time control and the like.

Description

technical field [0001] The invention belongs to the technical field of polyolefin synthesis, and relates to a method for preparing terminal-functionalized hyperbranched polyolefins; in particular, it relates to a functional hyperbranched polyolefin whose terminal group is a hydroxyl group, an ester group, a carboxyl group, a cyano group, or a carbon-carbon double bond. Polyolefin polymers and methods for their preparation. Background technique [0002] Functional polymers are a kind of polymers whose end groups are modified with specific functional groups, and are important precursors for the synthesis of block copolymers, branched polymers, and crosslinked structures. Compared with the main chain of the polymer, the proportion of the terminal group is very small, but the functionalized terminal group can often change the morphology of the polymer, thereby causing great changes in the properties of the polymer. The synthesis of functional polymers by metathesis polymerizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/08
CPCC08G61/08C08G2261/11C08G2261/3322C08G2261/418C08G2261/132
Inventor 朱新远任宁童刚生范钧琨张崇印李茂
Owner 上海零号源科技有限公司
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