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Preparation method of polyethylene glycol grafted poly-n-butyl methacrylate amphiphilic grafted copolymer

A polybutyl methacrylate and polyethylene glycol grafting technology, applied in the field of chemical materials, can solve the problem of less research on amphiphilic graft polymers, and achieve controllable molecular weight of side chains and adjustable graft density. Effect

Active Publication Date: 2018-03-30
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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  • Preparation method of polyethylene glycol grafted poly-n-butyl methacrylate amphiphilic grafted copolymer
  • Preparation method of polyethylene glycol grafted poly-n-butyl methacrylate amphiphilic grafted copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0028] Add 800mL of solvent tetrahydrofuran, 74.6g (0.50mol) of triethanolamine, and 5.06g (0.05mol) of acid-binding agent triethylamine into a four-neck flask equipped with a thermometer and a stirring paddle, place in an ice-water bath, stir mechanically, and wait for the system to When the internal temperature dropped below 3°C, 11.50 g (0.05 mol) of α-bromoisobutyryl bromide was added as slowly as possible through a constant-pressure dropping funnel. After the addition was complete, the ice-water bath was removed, and the reaction was carried out overnight at room temperature. After the reaction was completed, the generated salt was removed by filter paper filtration, the filtrate was evaporated under reduced pressure to remove the solvent tetrahydrofuran, the concentrated solution was dissolved in ethyl acetate, passed through an alkaline alumina column, collected and evaporated to obtain the product. After dr...

Embodiment 2

[0035] (1) Preparation of small molecule initiator

[0036]Add 800mL of solvent tetrahydrofuran, 74.6g (0.50mol) of triethanolamine, and 5.06g (0.05mol) of acid-binding agent triethylamine into a four-neck flask equipped with a thermometer and a stirring paddle, place in an ice-water bath, stir mechanically, and wait for the system to When the internal temperature dropped below 3°C, 10.79 g (0.05 mol) of α-bromopropionyl bromide was added as slowly as possible through a constant-pressure dropping funnel. After the addition was complete, the ice-water bath was removed, and the reaction was carried out overnight at room temperature. After the reaction was completed, the generated salt was removed by filter paper filtration, the filtrate was evaporated under reduced pressure to remove the solvent tetrahydrofuran, the concentrated solution was dissolved in ethyl acetate, passed through an alkaline alumina column, collected and evaporated to obtain the product. After drying in a va...

Embodiment 3

[0043] (1) Preparation of small molecule initiator

[0044] Add 800 mL of tetrahydrofuran as a solvent, 67.09 g (0.50 mol) of trimethylolpropane, and 5.06 g (0.05 mol) of acid-binding agent triethylamine into a four-neck flask equipped with a thermometer and a stirring paddle, place in an ice-water bath, and stir mechanically , when the internal temperature of the system dropped below 3°C, 11.50 g (0.05 mol) of α-bromoisobutyryl bromide was added as slowly as possible through a constant pressure dropping funnel. After the addition was complete, the ice-water bath was removed and the reaction was carried out overnight at room temperature. After the reaction was completed, the generated salt was removed by filter paper filtration, the filtrate was evaporated under reduced pressure to remove the solvent tetrahydrofuran, the concentrated solution was dissolved in ethyl acetate, passed through an alkaline alumina column, collected and evaporated to obtain the product. After drying ...

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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 two macromolecules that are incompatible with each other through the main chain and side chain. Grafted polymers usually have the comprehensive properties of the two homopolymers, and have a unique molecular structure and morphology. The performance of grafted polymers depends on the structure and length of the main and branch chains, as well as the number of branch chains. [0003] Amphiphilic graft copolymers refer to polymers containing two different chemical structures of hydrophilic and lipophilic in the same graft copolymer polymer chain. Through graft polymerization, the mechanical properties, viscoelasticity, permeability, crystallinity, solution properties, printing and dyei...

Claims

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Application Information

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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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