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Abstract
Polymerization-induced microphase separation has been used to prepare solid cross-linked monoliths containing bicontinuous and nanostructured polymer domains. We use this process to fabricate a monolith containing either a negatively or positively charged polyelectrolyte domain inside of the neutral styrene/divinylbenzene-derived matrix. First, the materials are made with a neutral pre-ionic polymer containing masked charged groups. The monoliths are then functionalized to a charged state by treatment with trimethylamine; small-angle X-ray scattering shows no significant morphological change in the microphase-separated structure upon postpolymerization modification. By exchanging dyes with the counterions in the material, we corroborated the continuity of the charged domains. Using ion-exchange capacity measurements, we estimate the number of accessible charges within the material based on macro-chain transfer agent molar mass and loading.
Original language | English (US) |
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Pages (from-to) | 60-64 |
Number of pages | 5 |
Journal | ACS Macro Letters |
Volume | 10 |
Issue number | 1 |
DOIs | |
State | Published - Dec 15 2020 |
Bibliographical note
Funding Information:The authors acknowledge the National Science Foundation for financial support of this work (DMR-2003454).
Funding Information:
Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial funding support from the National Science Foundation (NSF) through the MRSEC program.
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