Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multi-block copolymer

A multi-block copolymer and segment technology, applied in the field of polymer materials, can solve the problems of no obvious improvement in performance, incomplete elimination of polyoxyethylene crystallinity, and incomplete elimination of triblock copolymer crystallinity. , to achieve the effect of broadening the hydrophilicity and mechanical properties and achieving the best comprehensive performance

Inactive Publication Date: 2014-06-18
TORAY ADVANCED MATERIALS RES LAB CHINA
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these studies, the performance of the diblock copolymers containing polyoxyethylene structure in the side chain has not been significantly improved compared with the homopolymers of each block, and the crystallinity of polyoxyethylene itself has not been completely eliminated; while three The crystallinity of block copolymers has not been completely eliminated

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
  • Multi-block copolymer
  • Multi-block copolymer
  • Multi-block copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064]

[0065] (1) Synthesis of block chain A

[0066] Under a nitrogen atmosphere, 15.5 g (15.8 mmol) of methoxypolyoxyethylene monomethacrylate monomer (PEGMA-1, M n =980, m=20) was dissolved in 15ml of toluene, and 45.3mg (0.316mmol) of cuprous bromide and 98.65mg (0.732mmol) of 4,4'-bipyridine were added to the solution. After stirring well for 10 minutes, 57.2 mg (0.316 mmol) of ethyl α-bromopropionate was added, and the temperature was raised to 90°C to start polymerization. After 30 hours of polymerization, the reaction system was placed in ice water to stop the polymerization reaction. Add tetrahydrofuran for dilution, remove the catalyst / ligand complex with a neutral alumina column, spin dry, and then wash away unreacted monomers with anhydrous ether to obtain refined polymethoxyethylene glycol monomethacrylic acid Esters (referred to as P(PEGMA)-1). The number average molecular weight of P(PEGMA)-1 is 42000, the GPC curve shows a single peak distribution, and t...

Embodiment 2

[0079]

[0080] With embodiment 1 gained polymethoxypolyoxyethylene monomethyl polyacrylate-b-polystyrene-b-polymethoxypolyoxyethylene monomethyl polyacrylate-b-polystyrene (A-B-A-B type) The tetrablock copolymer is used as the macroinitiator to prepare the pentablock copolymer.

[0081] (1) Synthesis of A-B-A-B-A Pentablock Copolymer

[0082] Under an argon atmosphere, add 10.92 mg (0.075 mmol) of cuprous bromide, 23.77 mg (0.15 mmol) of 4,4'-bipyridine and 5.2 ml of toluene, stir for 10 minutes to form a catalyst / ligand complex and then add 3.13 g (3.0 mmol) methoxypolyoxyethylene monomethacrylate monomer (PEGMA-1, M n =1042, m=20), continue stirring for 15 minutes and then add 2.4g (0.015mmol) of macroinitiator (tetrablock copolymer). Seal the reaction system and stir it magnetically. After the macromolecular initiator is dissolved, the temperature of the reaction system is raised to 90° C. at a rate of 1.5° C. / min to start polymerization. After 100 hours of polymeriza...

Embodiment 3

[0089]

[0090] (1) Synthesis of block chain A

[0091] Under a nitrogen atmosphere, 18.0 g (40.0 mmol) of methoxypolyoxyethylene monomethacrylate monomer (PEGMA-2, M n =450, m=8) was dissolved in 25ml of toluene, and 57.34mg (0.40mmol) of cuprous bromide and 107.82mg (0.80mmol) of 4,4'-bipyridine were added to the solution. After fully stirring for 10 minutes, 75.57 mg (0.40 mmol) of dichloroacetophenone was added, and the temperature was raised to 90°C to start polymerization. After 25 hours of polymerization, the reaction system was placed in ice water to stop the polymerization reaction. Add tetrahydrofuran for dilution, remove the catalyst / ligand complex with a neutral alumina column, spin dry, and then wash away unreacted monomers with anhydrous ether to obtain refined polymethoxyethylene glycol monomethacrylic acid Esters (referred to as P(PEGMA)-2). The number average molecular weight of P(PEGMA)-2 is 6000, the GPC curve shows a single peak distribution, and the m...

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

PropertyMeasurementUnit
crystallinityaaaaaaaaaa
crystallinityaaaaaaaaaa
Login to View More

Abstract

The present invention discloses a multi-block copolymer having a polyoxyethylene side chain. The multi-block copolymer comprises a chain segment A having a polyoxyethylene side chain structure and a polyoxyethylene structure-free chain segment B. According to the present invention, the number of the blocks is creatively added, such that the performance of the multi-block copolymer is substantially improved, wherein the hydrophilicity and the crystallinity are easily adjusted, the micro-phase separation is easily achieved, and particularly the co-continuous phase separation structure is easily achieved so as to provide excellent comprehensive performances; and with the improved crystallinity, the improved hydrophilicity, the improved mechanical property and the like, applications of the polyoxyethylene-containing material in the fields of biomedical materials, high-performance separation membranes, modification on pharmaceutical protein, and the like can be broadened.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a multi-block copolymer. Background technique [0002] Polyoxyethylene, also known as polyethylene oxide or polyethylene glycol, is a crystalline, thermoplastic water-soluble polymer first produced by Japan Meisei Chemical Industry Co., Ltd. It can be used to modify pharmaceutical proteins, non-ionic surfactants, paper-making dispersants, flocculants, medicine / pesticides, cosmetics, paint printing, pottery, glass, photos, fluorescent tubes, etc., but due to its poor crystallinity and mechanical properties, etc. limited in practical applications. Therefore, block copolymers with polyoxyethylene as chain segments are mostly used to reduce their crystallinity or improve their mechanical properties and thermal properties to broaden their application fields, such as the block copolymers in JPA1991196407, JPA1998208545, JPA1998237143, JP2007522274, JP2009528428 and JP2012509983, etc. ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00
Inventor 杨扬范少夫陈桥吴刚出原大辅梅田浩明
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com