Please use this identifier to cite or link to this item:
Main Title: One-step RAFT synthesis of well-defined amphiphilic star polymers and their self-assembly in aqueous solution
Author(s): Herfurth, Christoph
Molina, Paula Malo de
Wieland, Christoph
Rogers, Sarah
Gradzielski, Michael
Laschewsky, André
Type: Article
Language Code: en
Abstract: Multifunctional chain transfer agents for RAFT polymerisation were designed for the one-step synthesis of amphiphilic star polymers. Thus, hydrophobically end-capped 3- and 4-arm star polymers, as well as linear ones for reference, were made of the hydrophilic monomer N,N-dimethylacrylamide (DMA) in high yield with molar masses up to 150 000 g mol−1, narrow molar mass distribution (PDI ≤ 1.2) and high end group functionality (∼90%). The associative telechelic polymers form transient networks of interconnected aggregates in aqueous solution, thus acting as efficient viscosity enhancers and rheology modifiers, eventually forming hydrogels. The combination of dynamic light scattering (DLS), small angle neutron scattering (SANS) and rheology experiments revealed that several molecular parameters control the structure and therefore the physical properties of the aggregates. In addition to the size of the hydrophilic block (maximum length for connection) and the length of the hydrophobic alkyl chain ends (stickiness), the number of arms (functionality) proved to be a key parameter.
Issue Date: 2012
Date Available: 29-Jun-2016
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Sponsor/Funder: EC/FP7/226507/EU/Integrated Infrastructure Initiative for Neutron Scattering and Muon Spectroscopy/NMI3
Journal Title: Polymer chemistry
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 3
Issue: 6
Publisher DOI: 10.1039/c2py20126g
Page Start: 1606
Page End: 1617
EISSN: 1759-9954
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:Inst. Chemie » Publications

Files in This Item:
File Description SizeFormat 
c2py20126g.pdf629.1 kBAdobe PDFThumbnail

Items in DepositOnce are protected by copyright, with all rights reserved, unless otherwise indicated.