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Effects of Ion-Induced Cross-Linking on the Phase Behavior in Salt-Doped Polymer Blends

Ren, Chun-Lai and Nakamura, Issei and Wang, Zhen-Gang (2016) Effects of Ion-Induced Cross-Linking on the Phase Behavior in Salt-Doped Polymer Blends. Macromolecules, 49 (1). pp. 425-431. ISSN 0024-9297. doi:10.1021/acs.macromol.5b02229.

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Taking PEO/PS polymer blends doped with lithium salt as example, we study the effects of cross-linking of the EO segments by the Li^+ ions on the phase behavior. Combining the Flory–Huggins theory with a statistical model accounting for the combinatorics in forming the cross-links and accounting for the charge neutrality due to the presence of anions, we find an entropic driving force that favors phase separation when the number of EO segments coordinating an Li^+ ion exceeds 2. As a result of the asymmetric interaction between the ions and the two polymers, the phase diagram in the polymer composition becomes asymmetric upon addition of the lithium salts. In addition, we examine the effects of preferential solvation energy of the ions which has been shown previously to lead to an increase in the effective χ parameter between the two polymers. We find that the magnitudes of these two driving forces are comparable, but their effects are nonadditive.

Item Type:Article
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URLURL TypeDescription
Nakamura, Issei0000-0002-2701-6913
Wang, Zhen-Gang0000-0002-3361-6114
Additional Information:© 2016 American Chemical Society. Received: October 8, 2015. Revised: December 16, 2015. Published: December 28, 2015. This work is supported in part by the National Natural Science Foundation of China under Grant Nos. 21274062 and 21474112. The authors declare no competing financial interest.
Funding AgencyGrant Number
National Natural Science Foundation of China21274062
National Natural Science Foundation of China21474112
Issue or Number:1
Record Number:CaltechAUTHORS:20160211-082427816
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Official Citation:Effects of Ion-Induced Cross-Linking on the Phase Behavior in Salt-Doped Polymer Blends Chun-Lai Ren, Issei Nakamura, and Zhen-Gang Wang Macromolecules 2016 49 (1), 425-431 DOI: 10.1021/acs.macromol.5b02229
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64407
Deposited By: Ruth Sustaita
Deposited On:18 Feb 2016 18:44
Last Modified:10 Nov 2021 23:30

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