Hyperbranched polyether ester preparation method

The technology of a polyetherester and a polymerization method is applied in the field of preparation of hyperbranched polyetherester, which can solve the problems of lowering performance and achieve the effects of high controllability, easy availability of synthetic raw materials, and high selective activity.

Active Publication Date: 2016-08-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this unique combination often imparts many distinctive properties to the polymer
Hyperbranched polymers containing a large number of aromatic groups, too strong rigidity will cause a large steric hindrance effect, which greatly reduces its performance

Method used

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  • Hyperbranched polyether ester preparation method
  • Hyperbranched polyether ester preparation method
  • Hyperbranched polyether ester preparation method

Examples

Experimental program
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Effect test

Embodiment example 1

[0026] Add 10.0g (0.065mol) of 2,3-dihydroxybenzoic acid, 53.9g (0.39mol) of acid-binding agent potassium carbonate, and 31.6g (0.13mol) of 1,6-dibromohexane into the reactor at the same time and dissolved in 83.2mL of N,N′-dimethylformamide; the temperature was raised to 20°C for 96 hours; after the reaction was completed, acidified with inorganic acid, and the precipitate was filtered to obtain the filtrate; the filtrate was mixed with equal volumes of ethanol and deionized water Precipitated in the dissolved precipitant, dried for 24 hours, and obtained 8.6 g of light yellow solid with a yield of 86%.

Embodiment example 2

[0028] In this embodiment, in the preparation process of hyperbranched polyether ester by the seedless one-pot method, the raw material 10.0g (0.065mol) 3,5-dihydroxybenzoic acid is replaced by 10.0g (0.065mol) 3,4-dihydroxybenzene Formic acid, others are identical with embodiment case 1.

Embodiment example 3

[0030] In this embodiment, in the preparation process of hyperbranched polyether ester by the seedless one-pot method, the raw material 10.0g (0.065mol) of 3,5-dihydroxybenzoic acid is replaced by 10.0g (0.065mol) of 2,6-dihydroxybenzene Formic acid, others are identical with embodiment case 1.

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Abstract

The invention relates to a hyperbranched polyether ester preparation method. Commercial bis-functionality haloalkane and tri-functionality hydroxyl / carboxyl are adopted as raw materials to realize one-pot synthesis of hyperbranched polyether ester through an A2+B3 polymerization method. The hyperbranched polyether ester preparation method is simple in procedures, the raw materials are easy to acquire, the prepared hyperbranched polyether ester contains high-reactivity end groups, and various functional groups or polymer chains can be introduced into the hyperbranched polyether ester by condensation reaction and ring opening reaction to prepare hyperbranched polymers with diversified performances and unique functions.

Description

technical field [0001] The invention relates to a preparation method of hyperbranched polyether ester, which belongs to the field of organic polymers. Background technique [0002] Dendritic polymers have a highly ordered three-dimensional structure, which is very different from traditional linear polymers in structure. It consists of an initiating core, inner repeating units and outer end groups, and has a high degree of geometric symmetry. , precise molecular structure, a large number of surface functional groups and internal cavities. However, it often takes a lot of time to prepare a perfect dendritic polymer, which limits the application of dendritic polymers, and the price of dendritic polymers is generally relatively high due to the difficulty in preparation. Compared with dendritic polymers, hyperbranched polymer molecules have an irregular three-dimensional quasi-spherical structure, the molecule contains some linear structural units, and some functional groups are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/664C08G63/682C08G63/78
CPCC08G63/664C08G63/6822C08G63/78C08G63/682C08G83/008C08G63/81
Inventor 李小杰刘兴亮罗静
Owner JIANGNAN UNIV
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