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Title: Bicomponent Block Copolymers Derived from One or More Random Copolymers as an Alternative Route to Controllable Phase Behavior

Abstract

Block copolymers have been extensively studied due to their ability to spontaneously self-organize into a wide variety of morphologies that are valuable in energy-, medical- and conservation-related (nano)technologies. While the phase behavior of bicomponent diblock and triblock copolymers is conventionally governed by temperature and individual block masses, we demonstrate that their phase behavior can alternatively be controlled through the use of blocks with random monomer sequencing. Block random copolymers (BRCs), i.e., diblock copolymers wherein one or both blocks is a random copolymer comprised of A and B repeat units, have been synthesized, and their phase behavior, expressed in terms of the order-disorder transition (ODT), has been investigated. Our results establish that, depending on the block composition contrast and molecular weight, BRCs can microphase-separate. We also report that the predicted ODT can be generated at relatively constant molecular weight and temperature with these new soft materials. This sequence-controlled synthetic strategy is extended to thermoplastic elastomeric triblock copolymers differing in chemistry and possessing a random-copolymer midblock.

Authors:
 [1];  [2];  [1];  [3];  [1];  [4]
  1. Corporate Research and Development, The Procter and Gamble Company, Cincinnati OH 45224 USA
  2. Department of Materials Science and Engineering, North Carolina State University, Raleigh NC 27695 USA
  3. Advanced Photon Source, Argonne National Laboratory, Argonne IL 60439 USA
  4. Department of Materials Science and Engineering, North Carolina State University, Raleigh NC 27695 USA; Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh NC 27695 USA
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1413496
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Macromolecular Rapid Communications
Additional Journal Information:
Journal Volume: 38; Journal Issue: 17; Journal ID: ISSN 1022-1336
Publisher:
Wiley
Country of Publication:
United States
Language:
English

Citation Formats

Ashraf, Arman R., Ryan, Justin J., Satkowski, Michael M., Lee, Byeongdu, Smith, Steven D., and Spontak, Richard J. Bicomponent Block Copolymers Derived from One or More Random Copolymers as an Alternative Route to Controllable Phase Behavior. United States: N. p., 2017. Web. doi:10.1002/marc.201700207.
Ashraf, Arman R., Ryan, Justin J., Satkowski, Michael M., Lee, Byeongdu, Smith, Steven D., & Spontak, Richard J. Bicomponent Block Copolymers Derived from One or More Random Copolymers as an Alternative Route to Controllable Phase Behavior. United States. doi:10.1002/marc.201700207.
Ashraf, Arman R., Ryan, Justin J., Satkowski, Michael M., Lee, Byeongdu, Smith, Steven D., and Spontak, Richard J. Thu . "Bicomponent Block Copolymers Derived from One or More Random Copolymers as an Alternative Route to Controllable Phase Behavior". United States. doi:10.1002/marc.201700207.
@article{osti_1413496,
title = {Bicomponent Block Copolymers Derived from One or More Random Copolymers as an Alternative Route to Controllable Phase Behavior},
author = {Ashraf, Arman R. and Ryan, Justin J. and Satkowski, Michael M. and Lee, Byeongdu and Smith, Steven D. and Spontak, Richard J.},
abstractNote = {Block copolymers have been extensively studied due to their ability to spontaneously self-organize into a wide variety of morphologies that are valuable in energy-, medical- and conservation-related (nano)technologies. While the phase behavior of bicomponent diblock and triblock copolymers is conventionally governed by temperature and individual block masses, we demonstrate that their phase behavior can alternatively be controlled through the use of blocks with random monomer sequencing. Block random copolymers (BRCs), i.e., diblock copolymers wherein one or both blocks is a random copolymer comprised of A and B repeat units, have been synthesized, and their phase behavior, expressed in terms of the order-disorder transition (ODT), has been investigated. Our results establish that, depending on the block composition contrast and molecular weight, BRCs can microphase-separate. We also report that the predicted ODT can be generated at relatively constant molecular weight and temperature with these new soft materials. This sequence-controlled synthetic strategy is extended to thermoplastic elastomeric triblock copolymers differing in chemistry and possessing a random-copolymer midblock.},
doi = {10.1002/marc.201700207},
journal = {Macromolecular Rapid Communications},
issn = {1022-1336},
number = 17,
volume = 38,
place = {United States},
year = {2017},
month = {6}
}

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