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Functionalized hyperbranched polyphenylene ether and method for preparing same

A polyphenylene ether and functionalization technology, applied in the field of hyperbranched polymer and its preparation, modified hyperbranched polyphenylene ether and its preparation, can solve problems such as unreported technology, and achieve the expansion of compatibility and reaction performance, and the effect of expanding application scale

Inactive Publication Date: 2012-12-05
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on HBPPO and related technologies containing two or more different active groups at the same time

Method used

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  • Functionalized hyperbranched polyphenylene ether and method for preparing same
  • Functionalized hyperbranched polyphenylene ether and method for preparing same
  • Functionalized hyperbranched polyphenylene ether and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Synthesis of hyperbranched polyphenylene ether

[0024] Under a nitrogen atmosphere, 2.41g (6.82mmol) of 4-bromo-4', 4"-dihydroxytriphenylmethane, 1.08g (7.81mmol) of anhydrous K 2 CO 3 and 25.0ml toluene were sequentially added to 98ml dimethyl sulfoxide (DMSO), and the temperature was raised to reflux for dehydration for 3 hours. Afterwards, the temperature of the reaction system was lowered to 45° C., 13.5 mg (0.14 mmol) of catalyst CuCl was added, and then the temperature was raised to 170° C. and reacted at a constant temperature for 40 hours. After the reaction, the mixture was cooled to room temperature, acidified with hydrochloric acid, stirred for 0.5 hours, dropped into methanol / water mixture (volume ratio 4 / 6) to precipitate, filtered, and vacuum-dried at 60°C to obtain a crude product. The crude product was dissolved in a small amount of tetrahydrofuran (THF) and filtered; the filtrate was precipitated with cyclohexane, filtered and washed with cyclohe...

Embodiment 2

[0036] Preparation of Functionalized Hyperbranched Polyphenylene Ether

[0037]Under an argon atmosphere, at normal temperature, the hyperbranched polyphenylene ether, 10g of potassium hydroxide, 100g of dimethylformamide (DMF) and 1g of tetrabutyl bromide prepared in the first step (1) of the 100g embodiment Ammonium was put into a three-necked flask. Raise the temperature to 70°C and stir for 1 hour. After cooling down to 40°C, start to add 20g of 3-bromopropene dropwise, and finish dropping in 0.7 hours; then raise the temperature to 60°C, keep warm and reflux for 3 hours, then raise the temperature to 80°C, keep warm and reflux for 3 hours. After the reaction was completed, it was cooled to room temperature, stirred and dropped into a mixed solution of methanol and water (volume ratio 1:3), and filtered. After the filter cake is vacuum-dried at 50°C, it is dissolved in tetrahydrofuran, dropped into cyclohexane while stirring, filtered, and the filter cake is vacuum-dried...

Embodiment 3

[0040] Preparation of Functionalized Hyperbranched Polyphenylene Ether

[0041] Under a nitrogen atmosphere, at normal temperature, the hyperbranched polyphenylene ether, 15g sodium hydroxide, 250g dimethylacetamide (DMAc) and 2g benzyltriethyl chloride prepared in step (1) of 100g embodiment Ammonium was put into a three-necked flask. Raise the temperature to 60°C and stir for 0.5 hours. After cooling down to 50°C, 30 g of 3-chloropropene was added dropwise, and the dropwise was completed within 2.5 hours. Then the temperature was raised to 60°C, and the temperature was kept at reflux for 4 hours, and then the temperature was raised to 80°C, and the temperature was kept at reflux for 3 hours. After the reaction was completed, it was cooled to room temperature, stirred and dropped into a mixed solution of methanol and water (volume ratio 1:2), and filtered. After the filter cake was vacuum dried at 60°C, it was dissolved in tetrahydrofuran, dropped into cyclohexane while st...

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Abstract

The invention discloses functionalized hyperbranched polyphenylene ether and a method for preparing the same. The method comprises the following steps of: under the atmosphere of inert gases, dissolving 100 weight parts of allylating hyperbranched polyphenylene ether into 10 to 3,000 weight parts of tetrahydrofuran, adding 10 to 80 weight parts of m-chloroperoxybenzoic acid into the mixed solution, reacting at the temperature of between 30 and 65 DEG C for 10 to 48 hours, adding reaction solution into methanol / aqueous solution dropwise, and filtering, drying and purifying a precipitate to obtain the functionalized hyperbranched polyphenylene ether. The end group of the functionalized hyperbranched polyphenylene ether simultaneously contains one or two kinds of active groups of epoxy group, allyl group and phenolic hydroxyl group. The obtained product not only keeps excellent solubility, thermal stability, dielectric property and the like of the hyperbranched polyphenylene ether, but also can improve the compatibility with other polymers by reaction of various active groups so as to improve the workability and service performance; and the functionalized hyperbranched polyphenylene ether has a wide application prospect.

Description

technical field [0001] The invention relates to a hyperbranched polymer and a preparation method thereof, in particular to a modified hyperbranched polyphenylene ether and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] As we all know, polyphenylene oxide (PPO) has outstanding dielectric properties (low dielectric constant and dielectric loss factor), moisture resistance, good heat resistance and dimensional stability, and has great application potential in the fields of electronics and electrical appliances . However, its high melting temperature and poor melt fluidity limit its application. [0003] Compared with linear polymers, hyperbranched polymers exhibit lower melt viscosity and good solubility due to their unique highly branched structure. Therefore, hyperbranched polyphenylene ether (HBPPO) can solve the problem of difficult processing caused by high melting temperature and poor melt fluidity of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/48C07D303/26
Inventor 梁国正黄萍珍顾嫒娟袁莉
Owner SUZHOU UNIV
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