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A kind of preparation method of polyethylene glycol graft polybutylmethacrylate amphiphilic graft copolymer

A technology of polybutylmethacrylate and polyethylene glycol grafting, which is applied in the field of chemical materials, can solve the problems of less research on amphiphilic graft polymers, and achieve controllable side chain molecular weight and adjustable graft density Effect

Active Publication Date: 2019-10-11
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the relevant reports are about amphiphilic block copolymers, and there are relatively few studies on amphiphilic graft polymers, and there are few reports on amphiphilic grafting with main chain hydrophilic and side chain hydrophobic. Copolymer

Method used

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  • A kind of preparation method of polyethylene glycol graft polybutylmethacrylate amphiphilic graft copolymer
  • A kind of preparation method of polyethylene glycol graft polybutylmethacrylate amphiphilic graft copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of small molecule dihydroxy initiator

[0028] Into a four-neck flask equipped with a thermometer and a stirring paddle, add 800 mL of solvent tetrahydrofuran, 74.6 g (0.50 mol) of triethanolamine, and 5.06 g (0.05 mol) of acid binding agent triethylamine, place it in an ice water bath, and stir it mechanically. The internal temperature dropped below 3°C, 11.50g (0.05mol) of α-bromoisobutyryl bromide was added as slowly as possible with a constant pressure dropping funnel, the ice water bath was removed after the addition, and the reaction was carried out at room temperature overnight. After the reaction, filter paper to remove the salt generated, the filtrate was rotated under reduced pressure to remove the solvent tetrahydrofuran, the concentrated solution was dissolved in ethyl acetate, passed over a basic alumina column, collected and rotated to obtain the product. After drying in a vacuum oven and weighing, the product was about 8.3 g, and the yield wa...

Embodiment 2

[0035] (1) Preparation of small molecule initiator

[0036] Into a four-neck flask equipped with a thermometer and a stirring paddle, add 800 mL of solvent tetrahydrofuran, 74.6 g (0.50 mol) of triethanolamine, and 5.06 g (0.05 mol) of acid binding agent triethylamine, place it in an ice water bath, and stir it mechanically. The internal temperature dropped below 3°C, and 10.79g (0.05mol) of α-bromopropionyl bromide was added as slowly as possible with a constant pressure dropping funnel. After the addition was completed, the ice-water bath was removed, and the reaction was carried out at room temperature overnight. After the reaction, filter paper to remove the salt generated, the filtrate was rotated under reduced pressure to remove the solvent tetrahydrofuran, the concentrated solution was dissolved in ethyl acetate, passed over a basic alumina column, collected and rotated to obtain the product. After drying in a vacuum oven and weighing, the product was about 8.3 g, and the ...

Embodiment 3

[0043] (1) Preparation of small molecule initiator

[0044] Add solvent tetrahydrofuran 800mL, trimethylolpropane 67.09g (0.50mol), acid binding agent triethylamine 5.06g (0.05mol) into a four-necked flask equipped with a thermometer and a stirring paddle, and place it in an ice water bath with mechanical stirring When the internal temperature of the system drops below 3°C, 11.50 g (0.05 mol) of α-bromoisobutyryl bromide is added as slowly as possible with a constant pressure dropping funnel. After the addition is completed, the ice-water bath is removed, and the reaction is carried out at room temperature overnight. After the reaction, filter paper to remove the salt generated, the filtrate was rotated under reduced pressure to remove the solvent tetrahydrofuran, the concentrated solution was dissolved in ethyl acetate, passed over a basic alumina column, collected and rotated to obtain the product. After drying in a vacuum oven and weighing, the product was about 8.3 g, and the...

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Abstract

The invention relates to a preparation method of a polyethylene glycol grafted poly-n-butyl methacrylate amphiphilic grafted copolymer. The method comprises the steps of firstly, preparing a polyethylene glycol macromolecular initiator by using a micromolecular dyhydroxyl initiator and then utilizing a 'grafting from' strategy to prepare the amphiphilic grafted copolymer which is clear in structure and narrower in molecular weight distribution. The preparation method provided by the invention has the beneficial effects that the method is used for preparing the polyethylene glycol grafted poly-n-butyl methacrylate amphiphilic grafted copolymer which contains a hydrophilic main chain and hydrophobic side chains; the grafted copolymer synthesized by the method has the characteristics of beingadjustable in grafting density and controllable in molecular weight of chain segments of branch chains.

Description

Technical field [0001] The invention belongs to the field of chemical materials and relates to a preparation method of polyethylene glycol grafted polybutyl methacrylate amphiphilic graft copolymer. Background technique [0002] Graft copolymer is a polymer formed by the chemical connection of the main chain and the side chain of two incompatible macromolecules. The graft polymer usually has the comprehensive properties of the two homopolymers, and has a unique molecular structure and morphology. The properties of grafted polymers depend on the composition and length of the main and branch chains, as well as the number of branches. [0003] Amphiphilic graft copolymer refers to a polymer with two different chemical structures, hydrophilic and lipophilic, in the same graft copolymer polymer chain. Through graft polymerization, the mechanical properties, viscoelasticity, permeability, crystallinity, solution properties, printing and dyeing and other physical and chemical properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/18
CPCC08F283/06C08F220/1804
Inventor 李坚白雪刘新任强汪称意
Owner CHANGZHOU UNIV
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