Chemistry, Department of
Department of Chemistry: Faculty Publications
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ORCID IDs
https://orcid.org/0000-0003-0384-3559
https://orcid.org/0000-0002-0622-3489
https://orcid.org/0000-0001-9298-4083
https://orcid.org/0000-0001-6692-3762
Document Type
Article
Date of this Version
11-14-2019
Citation
2019 by the authors
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 affnity toward P4VP, respectively.
Included in
Analytical Chemistry Commons, Medicinal-Pharmaceutical Chemistry Commons, Other Chemistry Commons
Comments
Polymers 2019, 11, 1882; doi:10.3390/polym11111882 www.mdpi.com/journal/polymers