Synthesis and physical gelation induced by self-assembly of well-defined poly(arylene ether sulfone)s with various numbers of arms

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A series of well-defined poly(arylene ether sulfone)s were synthesized (1P-4P) by chain-growth condensation polymerization with amide initiators having various numbers of initiating sites. Differential Scanning Calorimetry (DSC) study of the polymers revealed that branched polymers (3P and 4P) had higher glass transition temperatures (T-g) than linear polymers (1P and 2P) when they had the identical concentration of end groups. However, the viscosity of the polymers decreases as the number of branches increase due to the change of the hydrodynamic volume. Interestingly physical gelation of THF solution of these polymers was observed. Analyses of the self-assembled structure by FE-SEM, FE-TEM, temperature-dependent H-1 NMR, FT-IR, and XRD indicated that the formation of fibrillar network was driven by the hydrogen bonding of aromatic amides.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2011
Language
English
Article Type
Article
Citation

POLYMER CHEMISTRY, v.2, no.5, pp.1174 - 1179

ISSN
1759-9954
DOI
10.1039/c0py00418a
URI
http://hdl.handle.net/10203/98273
Appears in Collection
NT-Journal Papers(저널논문)CH-Journal Papers(저널논문)
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