Title Amphiphilic block Copolymer micelles in selective solvents: The effect of solvent selectivity on micelle formation
Date 14.11.2019
Number 57944
Abstract We investigated the micellar behavior of a series of asymmetric polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymers in different P4VP-selective alcoholic solvents. The micellar behavior was further correlated with the spectroscopic ellipsometry results obtained on swelling of PS and P4VP polymer films in the corresponding solvent vapors. The time-resolved (in situ) dynamic light scattering (DLS) measurements, in combination with (ex situ) electron microscopy imaging, revealed information about the aggregation state of PS-b-P4VP BCP in different alcohols and the effect of heat treatment. The ellipsometry measurements allowed us to estimate the difference in solvent selectivity toward PS/P4VP pair. Both DLS and ellipsometric studies suggested that less polar alcohols (i.e., 1-propanol, 1-butanol, and 1-pentanol) are likely to be close to each other in terms of their selectivity toward PS/P4VP pair, whereas more polar ethanol and methanol show the highest and the lowest affinity toward P4VP, respectively.
Publisher Polymers
Citation Polymers 11 (2019) 1882
Authors Kumar, L. ; Horechyy, A. ; Bittrich, E. ; Nandan, B. ; Uhlmann, P. ; Fery, A.
Tags block copolymer micelles selective solvent solution self-assembly ps-b-p4vp p4vp corona spectroscopic ellipsometry vapor swelling

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