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A kind of 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, limited group types, practical application restrictions, etc., and achieve the effect of improving production capacity

Active Publication Date: 2022-07-15
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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  • A kind of preparation method of end-group functionalized hyperbranched polyolefin
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Embodiment 1

[0037] The present embodiment relates to a method for synthesizing end-group-functionalized hyperbranched polyolefin with controllable branching degree and controllable end-group type. The synthesis route is as follows: figure 1 shown, including 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 tetrahydrofuran), reacted under argon for 24h (reaction temperature was 50°C), and then added vinyl ether / tetrahydrofuran solution (v:v=50%) ) 0.5ml terminates the reaction, the product structure is as figure 2 Shown: n is 8, m is 1, the conversion of monomer is 54.8%, and the degree of branching of the product is 29.9%.

Embodiment 2

[0040]The present embodiment relates to a method for synthesizing end-group-functionalized hyperbranched polyolefin with controllable branching degree and controllable end-group type. The synthesis route is as follows: figure 1 shown, including 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, dissolve in 20μL tetrahydrofuran) and chain transfer agent cis-2-butane En-1,4-diol (4.41mg, dissolved in 20μL tetrahydrofuran), reacted under argon for 24h (reaction temperature was 25°C), and then added vinyl ether / tetrahydrofuran solution (v:v=50%) 0.5 The reaction is terminated by ml, and the product structure is as follows image 3 Shown: n is 10, m is 1, the conversion of monomer is 42.6%, and the degree of branching of the product is 14.9%.

Embodiment 3

[0043] The present embodiment relates to a method for synthesizing end-group-functionalized hyperbranched polyolefin with controllable branching degree and controllable end-group type. The synthesis route is as follows: figure 1 shown, including the following steps:

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

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Abstract

The present invention relates to a preparation method of end-group functionalized hyperbranched polyolefin. The preparation method is as follows: using 3-allyl-cyclooctene as a monomer, introducing several olefins with terminal functional groups as chain transfer agents, and performing ring-opening metathesis polymerization and crossover in the presence of several Grubbs catalysts The metathesis reaction occurs simultaneously, and the end-group functionalized polyolefin is directly obtained. Compared with the prior art, the preparation method involved in the present invention can simultaneously realize the preparation of hyperbranched polyolefins and the functionalization of their end groups through a one-pot method; The change of concentration, the control of reaction temperature and time and other means can realize the control of reaction conversion rate, product structure, type and quantity of end group units, etc.

Description

technical field [0001] The invention belongs to the technical field of polyolefin synthesis, and relates to a preparation method of end-group functionalized hyperbranched polyolefin; in particular to a class of functional hyperbranched polyolefins whose end groups are hydroxyl or ester group or carboxyl group or cyano group or carbon-carbon double bond Polyolefin polymer and preparation method thereof. Background technique [0002] Functional polymers are polymers whose end groups are modified with specific functional groups, and are important precursors for the synthesis of block copolymers, branched polymers, and cross-linked structures. Compared with the main chain of the polymer, the proportion of end groups is small, but the functionalized end groups can often change the morphology of the polymer, thus causing great changes in the properties of the polymer. Synthesis of functional polymers by metathesis polymerization is a technical means reported in the literature. T...

Claims

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Application Information

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Patent Type & Authority Patents(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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