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Method for preparing double-hydrophilic block copolymer

A block copolymer, water-based technology, applied in the field of functional polymer preparation, can solve the problems of harsh reaction conditions, limited range of applicable monomers, etc., and achieve the effects of uniform molecular weight distribution, wide range of applicable monomers, and simple operation

Inactive Publication Date: 2009-09-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of them have shortcomings such as limited range of applicable monomers and harsh reaction conditions.

Method used

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  • Method for preparing double-hydrophilic block copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The first step: preparation of macroinitiator PtBMA-Cl

[0025] At room temperature, sequentially add quantitative PMDETA or bpy, CuCl, tBMA, ECP and a certain amount of DMF into the three-necked flask, stir well, and seal it after passing nitrogen gas for 30 minutes. React in an oil bath at 70-80°C for a predetermined time, take out the three-necked flask to cool, dissolve the reaction product with THF, and pass the solution through an alumina glass column to remove residual CuCl. Precipitation and suction filtration were carried out with methanol:water volume ratio 1:1, and the product was re-dissolved and precipitated twice, then vacuum-dried to constant weight to obtain the PtBMA-Cl macroinitiator.

[0026] The second step: preparation of PtBMA-b-P4VP block copolymer

[0027] At room temperature, add PtBMA-Cl, Me 6 TREN or Me 6 [14]aneN 4 , CuCl, 4VP and a certain amount of solvent DMF, stir well, and seal it after passing nitrogen gas for 30 minutes. In an oil...

Embodiment 2

[0033] The reaction was carried out according to the steps described in Example 1, and in the third step, 2-chloroacetamide was used as the quaternization reagent. Add 10g block copolymer PtBMA-b-P4VP and 200mL DMF solvent into a round-bottomed flask. After stirring evenly, slowly add 2-chloroacetamide 1 to 5 times the molar weight of the P4VP structural unit at room temperature. Lower reaction 3~6h, follow-up steps are the same as embodiment 1.

Embodiment 3

[0035] The reaction was carried out according to the steps described in Example 1, and dimethyl sulfate was used as the quaternization reagent in the third step. Add 10g of block copolymer PtBMA-b-P4VP into a round bottom flask, 200mL of a mixed solvent with a volume ratio of methanol to ethylene glycol of 1:1, and slowly add 1 to 5 times the molar amount of the structural unit of the copolymer P4VP under stirring. Dimethyl sulfate, to ensure that all the pyridine rings in the copolymer are quaternized, react at room temperature for about 10 to 12 hours, and the subsequent steps are the same as in Example 1.

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Abstract

The invention relates to a method for preparing a double-hydrophilic block copolymer, belonging to the technical field of functional polymer preparation. Poly (tert-butylmethacrylate)-b- poly-4-vinylpyridine (PtBMA-b-P4VP) block copolymer is prepared by a tomic transfer radical polymerization method; and PMAA-b-QP4VP which is the double-hydrophilic block copolymer is obtained through the quaternary ammonium modification on a P4VP chain section and the hydrolysis reaction of tertiary butyl in a PtBMA chain section. Due to the antibacterial action of pyridinium and the mating reaction of pyridine group and metallic ion, the PMAA-b-QP4VP which is the double-hydrophilic block copolymer can be widely applied to the field of medicine, heavy metal loading, rubber, dye, water body sterilization, corrosion inhibition and microbial adsorption.

Description

technical field [0001] The invention discloses a method for preparing a double-hydrophilic block copolymer, which belongs to the technical field of functional polymer preparation. Background technique [0002] At present, there are many methods for the preparation of block copolymers: ionic polymerization, group transfer polymerization, reversible addition-fragmentation chain transfer radical polymerization, condensation reaction between polymer chains with active groups, etc. However, most of them have the disadvantages that the range of applicable monomers is limited and the reaction conditions are relatively harsh. The atom transfer radical polymerization (ATRP) method is suitable for many types of monomers, and the reaction conditions are relatively mild, and a polymer with a narrow molecular weight distribution can be obtained, and the molecular weight is easy to control. Tert-butyl methacrylate is a highly reactive monomer with strong hydrophobicity, and its tert-buty...

Claims

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Application Information

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IPC IPC(8): C08F293/00A01P3/00
Inventor 陈明清胡娜倪忠斌刘晓亚储鸿
Owner JIANGNAN UNIV
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