Molecular and morphological characterization of midblock-sulfonated styrenic triblock copolymers

Mineart, Kenneth P.; Ryan, Justin J.; Lee, Byeongdu; Smith, Steven D.; Spontak, Richard J.

doi:10.1002/polb.24294

Molecular and morphological characterization of midblock-sulfonated styrenic triblock copolymers

Journal Article · Wed Jan 11 00:00:00 EST 2017 · Journal of Polymer Science. Part B, Polymer Physics

DOI:https://doi.org/10.1002/polb.24294· OSTI ID:1366515

Mineart, Kenneth P. ^[1]; Ryan, Justin J. ^[1]; Lee, Byeongdu ^[2]; Smith, Steven D. ^[3]; Spontak, Richard J. ^[1]

North Carolina State Univ., Raleigh, NC (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
The Procter & Gamble Co., Cincinnati, OH (United States)

Midblock-sulfonated triblock copolymers afford a desirable opportunity to generate network-forming amphiphilic materials that are suitable for use in a wide range of emerging technologies as fuel-cell, water-desalination, ion-exchange, photovoltaic, or electroactive membranes. Employing a previously reported synthetic strategy wherein poly(p-tert-butylstyrene) remains unreactive, we have selectively sulfonated the styrenic midblock of a poly(p-tert-butylstyrene-b-styrene-b-p-tert- butylstyrene) (TST) triblock copolymer to different extents. Comparison of the resulting sulfonated copolymers with results from our prior study provides favorable quantitative agreement and suggests that a shortened reaction time is advantageous. An ongoing challenge regarding the morphological development of charged block copolymers is the competition between microphase separation of the incompatible blocks and physical cross-linking of ionic clusters, with the latter often hindering the former. Here, we expose the sulfonated TST copolymers to solvent-vapor annealing to promote nanostructural refinement. Furthermore, the effect of such annealing on morphological characteristics, as well as on molecular free volume, is explored.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); North Carolina State University; USDOE Office of Science (SC)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1366515

Journal Information:: Journal of Polymer Science. Part B, Polymer Physics, Journal Name: Journal of Polymer Science. Part B, Polymer Physics Journal Issue: 6 Vol. 55; ISSN 0887-6266

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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