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Title: Molecular and morphological characterization of midblock-sulfonated styrenic triblock copolymers

Abstract

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.

Authors:
 [1];  [1];  [2];  [3];  [1]
+ Show Author Affiliations
  1. North Carolina State Univ., Raleigh, NC (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. The Procter & Gamble Co., Cincinnati, OH (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
North Carolina State University; National Science Foundation (NSF); USDOE Office of Science (SC)
OSTI Identifier:
1366515
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Polymer Science. Part B, Polymer Physics
Additional Journal Information:
Journal Volume: 55; Journal Issue: 6; Journal ID: ISSN 0887-6266
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; block copolymers; ionomers; morphology; TEM; SAXS; self-assembly

Citation Formats

Mineart, Kenneth P., Ryan, Justin J., Lee, Byeongdu, Smith, Steven D., and Spontak, Richard J. Molecular and morphological characterization of midblock-sulfonated styrenic triblock copolymers. United States: N. p., 2017. Web. doi:10.1002/polb.24294.
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Mineart, Kenneth P., Ryan, Justin J., Lee, Byeongdu, Smith, Steven D., & Spontak, Richard J. Molecular and morphological characterization of midblock-sulfonated styrenic triblock copolymers. United States. https://doi.org/10.1002/polb.24294
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Mineart, Kenneth P., Ryan, Justin J., Lee, Byeongdu, Smith, Steven D., and Spontak, Richard J. Wed . "Molecular and morphological characterization of midblock-sulfonated styrenic triblock copolymers". United States. https://doi.org/10.1002/polb.24294. https://www.osti.gov/servlets/purl/1366515.
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@article{osti_1366515,
title = {Molecular and morphological characterization of midblock-sulfonated styrenic triblock copolymers},
author = {Mineart, Kenneth P. and Ryan, Justin J. and Lee, Byeongdu and Smith, Steven D. and Spontak, Richard J.},
abstractNote = {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.},
doi = {10.1002/polb.24294},
journal = {Journal of Polymer Science. Part B, Polymer Physics},
number = 6,
volume = 55,
place = {United States},
year = {Wed Jan 11 00:00:00 EST 2017},
month = {Wed Jan 11 00:00:00 EST 2017}
}
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https://doi.org/10.1002/polb.24294
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