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First-Order Disordered-to-Lamellar Phase Transition in Lithium Salt-Doped Block Copolymers

Nakamura, Issei and Balsara, Nitash P. and Wang, Zhen-Gang (2013) First-Order Disordered-to-Lamellar Phase Transition in Lithium Salt-Doped Block Copolymers. ACS Macro Letters, 2 (6). pp. 478-481. ISSN 2161-1653. doi:10.1021/mz4001404.

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We study the microphase separation of block copolymer electrolytes containing lithium salts. Taking poly(ethylene oxide)-b-polystyrene (PEO-b-PS) as an example, we show that in the presence of lithium salts the disordered-to-lamellar phase transition becomes first-order even at the level of mean-field theory, with a moderate range of temperature in which both the disordered and lamellar phases coexist, and different salt concentration in the coexisting phases. The coexistence arises from the different partitioning of the salt ions between the disordered phase and the lamellar phase, driven primarily by the solvation energy of anions. A striking consequence of the coexistence is that heating a lamellar phase into the coexistence region leads to increased order in the remaining lamellar phase.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Nakamura, Issei0000-0002-2701-6913
Balsara, Nitash P.0000-0002-0106-5565
Wang, Zhen-Gang0000-0002-3361-6114
Additional Information:© 2013 American Chemical Society. Received: March 22, 2013; Accepted: May 13, 2013; Published: May 16, 2013. This research has been supported by the National Science Foundation, Grants No. CBET-0965812 and No. CHE-1040558.
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Issue or Number:6
Record Number:CaltechAUTHORS:20130916-150307749
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Official Citation:First-Order Disordered-to-Lamellar Phase Transition in Lithium Salt-Doped Block Copolymers Issei Nakamura, Nitash P. Balsara, and Zhen-Gang Wang ACS Macro Letters 2013 2 (6), 478-481
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41348
Deposited By: Tony Diaz
Deposited On:16 Sep 2013 23:56
Last Modified:10 Nov 2021 04:29

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