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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/64594
Record Status
Checked
Record Id
64594
Title
One-step RAFT synthesis of well-defined amphiphilic star polymers and their self-assembly in aqueous solution
Contributors
C Herfurth (Universitat Potsdam)
,
P Malo de Molina (Technische Universitat Berlin)
,
C Wieland (Universitat Potsdam)
,
S Rogers (STFC Rutherford Appleton Lab.)
,
M Gradzielski (Technische Universitat Berlin)
,
A Laschewsky (Universitat Potsdam)
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 150000 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.
Organisation
ISIS
,
ISIS-SANS2D
,
STFC
Keywords
Funding Information
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Language
English (EN)
Type
Details
URI(s)
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Year
Journal Article
Polym Chem
3, no. 6 (2012): 1606-1617.
doi:10.1039/c2py20126g
2012
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