Method for preparing water-soluble graft polymers based on active/controllable radical polymerization

A technology of water-soluble polymers and graft polymers, which is applied in the field of preparation of water-soluble graft polymers based on living/controllable radical polymerization, which can solve the problem of limiting the application of living/controllable free radical polymerization and the decline of control effects, etc. question

Active Publication Date: 2016-06-01
BEIJING UNIV OF CHEM TECH
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Study on living/controlled free radical polymerization of water-soluble monomers such as (meth)acrylamide-based monomers, (meth)acrylic acid, (meth)acrylates, N-vinylpyrrolidone, etc., compared to other monomers and compared with the organic phase reaction system, the control effect of the commonly used living/controllable radical polymerization method on the water-

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing water-soluble graft polymers based on active/controllable radical polymerization
  • Method for preparing water-soluble graft polymers based on active/controllable radical polymerization
  • Method for preparing water-soluble graft polymers based on active/controllable radical polymerization

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0078] Example 1: PVP is a water-soluble polymer containing hydrogen donor groups, and BP is a hydrogen-abstracting photoinitiator to prepare a water-soluble multifunctional macroinitiator with dormant groups in its side groups

[0079] In a 200mL quartz photoreactor, add a 10wt% PVP aqueous solution prepared by dissolving 5.0gPVPK30 in 50mL water, and 1.25gBP dissolved in 50mL ethanol to prepare a 2.5wt% BP solution, and the system is evenly mixed and nitrogen is supplied for 30 minutes to remove oxygen. , Then put the mixed solution under ultraviolet light source to irradiate, the light intensity is set to 6000μW / cm 2 ; The irradiation time is set to 30 minutes. After the reaction, the polymer solution was precipitated with 100 mL ethanol to separate the water-soluble multifunctional macroinitiator from the system. The prepared macroinitiator was washed three times with 50 mL ethanol and twice with 50 mL acetone. Dried into a vacuum oven at room temperature to a constant weight...

Example Embodiment

[0080] Example 2: PAA is a water-soluble polymer containing hydrogen donor groups, and xanthone (XT) is a hydrogen-abstracting photoinitiator to prepare water-soluble multifunctional macromolecule initiators containing dormant groups in the side groups Agent

[0081] In a 200mL quartz photoreactor, add 5.0g of PAA dissolved in 50mL of water to prepare a 10wt% PAA aqueous solution, and 2.50g of XT dissolved in 50mL of tetrahydrofuran to prepare a 5.0wt% XT solution, and the system is evenly mixed and deoxygenated by nitrogen gas for 30 minutes , Then put the mixed solution under ultraviolet light source to irradiate, the light intensity is set to 8000μW / cm 2 ; The irradiation time is set to 40 minutes. After the reaction, the polymer solution was precipitated with 100 mL of ethanol to separate the water-soluble multifunctional macroinitiator from the system. The prepared macroinitiator was washed three times with 50 mL of ethanol, and then twice with 50 mL of acetone. The resultin...

Example Embodiment

[0082] Example 3: PAM is a water-soluble polymer containing hydrogen donor groups, and isopropylthioxanthone (ITX) is a hydrogen-abstracting photoinitiator to prepare water-soluble polyfunctionality with dormant groups in the side chain Macroinitiator

[0083] In a 200mL quartz photoreactor, add 5.0g of PAM dissolved in 50mL of water to prepare a 10wt% PAM aqueous solution, 2.50g of ITX dissolved in 50mL of tetrahydrofuran to prepare a 5.0wt% ITX solution, the system is evenly mixed and nitrogen is supplied for 30 minutes to remove oxygen , Then put the mixed solution under ultraviolet light source to irradiate, the light intensity is set to 8000μW / cm 2 ; The irradiation time is set to 30 minutes. After the reaction, the polymer solution was precipitated with 100 mL of ethanol to separate the water-soluble multifunctional macroinitiator from the system. The prepared macroinitiator was washed three times with 50 mL of ethanol, and then twice with 50 mL of acetone. The resulting pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing water-soluble graft polymers through active/controllable radical polymerization. The method can be used for controllable radical polymerization of various water-soluble monomers of a (methyl) acrylamide monomer, (methyl) acrylic acid, (methyl) acrylate and the like, so as to prepare the water-soluble graft polymers with different molecular weights. The preparation method is particularly realized through the following steps: firstly, preparing a water-soluble polyfunctional macroinitiator by adopting a chemical modification manner; secondly, initiating active/controllable radical polymerization of the water-soluble monomers by the macroinitiator under the heating or visible light/ultraviolet light irradiation condition, and preparing the molecular weight and chemical constitution controllable water-soluble graft polymers. The method is simple in synthetic route, low in production cost and safe and convenient to operate; the prepared macroinitiator is high in dissolution rate in water phase and high in initiating activity, and can be used for preparing the chemical constitution and molecular weight controllable water-soluble graft polymers.

Description

technical field [0001] The present invention relates to a new method for the preparation of water-soluble graft polymers by living / controlled free radical polymerization of water-soluble monomers, which can be used for (meth)acrylamide monomers, (meth)acrylic acid, (meth) Controlled / living radical polymerization of various water-soluble monomers such as acrylate) to prepare water-soluble graft polymers with controllable molecular weight. Background technique [0002] Free radical polymerization is the most widely used chemical reaction in the polymer synthesis industry. It has the advantages of wide range of monomer selection, mild reaction conditions, simple operation, and suspension and emulsion polymerization with water as the medium. However, traditional free radical polymerization also has many shortcomings, such as the uncontrollable molecular weight of the prepared polymer product, and the difficulty in designing and controlling the molecular structure of the polymer ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F285/00C08F265/02C08F283/06C08F271/02C08F220/06C08F220/56C08F265/10C08F265/04C08F2/48
CPCC08F2/48C08F265/02C08F265/04C08F265/10C08F271/02C08F283/06C08F285/00C08F220/56C08F220/06
Inventor 杨万泰陈冬王力马育红赵长稳
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap