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51
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Choi UH, Middleton LR, Soccio M, Buitrago CF, Aitken BS, Masser H, Wagener KB, Winey KI, Runt J. Dynamics of Precise Ethylene Ionomers Containing Ionic Liquid Functionality. Macromolecules 2015. [DOI: 10.1021/ma502168e] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- U Hyeok Choi
- Department
of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Functional
Composites Department, Korea Institute of Materials Science, Changwon 642-831, Korea
| | | | - Michelina Soccio
- Department
of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | | | - Brian S. Aitken
- George
and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Hanqing Masser
- Department
of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Kenneth B. Wagener
- George
and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | | | - James Runt
- Department
of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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52
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Jiao Y, Parra J, Akcora P. Effect of Ionic Groups on Polymer-Grafted Magnetic Nanoparticle Assemblies. Macromolecules 2014. [DOI: 10.1021/ma402509b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yang Jiao
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030, United States
| | - Javier Parra
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030, United States
| | - Pinar Akcora
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030, United States
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53
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Melchy PÉA, Eikerling MH. Physical theory of ionomer aggregation in water. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:032603. [PMID: 24730868 DOI: 10.1103/physreve.89.032603] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Indexed: 06/03/2023]
Abstract
This article presents a physical theory for the aggregation of ionomer molecules in aqueous solution. To study this phenomenon, we consider a system of charged rigid rods with uniform surface charge immersed in water. The free-energy functional derived for this system consists of hydrophobic and direct electrostatic contributions as well as entropic terms. Energy minimization gives the stable aggregation number as a function of surface charge density, surface tension, geometric parameters, and density of rods in solution. We provide configuration diagrams of the system, which display the impact of the hydrophobic and electrostatic interaction strengths on the stabilization of finite-size bundles.
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Affiliation(s)
- P-É A Melchy
- Simon Fraser University, 8888 University Drive, Burnaby, BC, Canada, V5A 1S6
| | - M H Eikerling
- Simon Fraser University, 8888 University Drive, Burnaby, BC, Canada, V5A 1S6
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54
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Lueth CA, Bolintineanu DS, Stevens MJ, Frischknecht AL. Hydrogen-bonded aggregates in precise acid copolymers. J Chem Phys 2014; 140:054902. [DOI: 10.1063/1.4863326] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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55
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Waters SM, McCoy JD, Frischknecht AL, Brown JR. Simulation of a small molecule analogue of a lithium ionomer in an external electric field. J Chem Phys 2014; 140:014902. [DOI: 10.1063/1.4855715] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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56
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Sing CE, Zwanikken JW, Olvera de la Cruz M. Ion Correlation-Induced Phase Separation in Polyelectrolyte Blends. ACS Macro Lett 2013; 2:1042-1046. [PMID: 35581876 DOI: 10.1021/mz400511r] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inhomogeneous polyelectrolyte materials have been of both longstanding and recent interest; polymer blends exhibit technologically advantageous properties for adhesives and fuel cell membranes and serve as an ideal model system to study more complicated behaviors in polyelectrolyte materials. However, the physics governing the phase behavior of polyelectrolyte blends remains poorly understood. Traditional self-consistent field theory (SCFT) can include Coulombic interactions that arise in polyelectrolytes but can only reproduce Poisson-Boltzmann behavior or perturbations thereof due to the mean-field nature of the SCFT calculation. Recently, tools have been developed to couple SCFT with liquid state (LS) integral equation theory, which can calculate ion correlations in a quantitative fashion. This permits the articulation of ion effects in very low dielectric εr constant regimes that are relevant to polymer blends in nonaqueous conditions. We show that the inclusion of local ion correlations can give rise to marked enhancement of phase separation, contrary to theories invoking the Poisson-Boltzmann approximation, even to the extent of driving phase separation when two polymers are fully miscible (χN = 0). We provide both a demonstration of this effect as well as a conceptual explanation.
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Affiliation(s)
- Charles E. Sing
- Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Jos W. Zwanikken
- Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Monica Olvera de la Cruz
- Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
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57
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Buitrago CF, Alam TM, Opper KL, Aitken BS, Wagener KB, Winey KI. Morphological Trends in Precise Acid- and Ion-Containing Polyethylenes at Elevated Temperature. Macromolecules 2013. [DOI: 10.1021/ma4013175] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Francisco Buitrago
- Department
of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Todd M. Alam
- Department
of Electronic, Optical and Nano Materials, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Kathleen L. Opper
- George
and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Brian S. Aitken
- George
and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Kenneth B. Wagener
- George
and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Karen I. Winey
- Department
of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department
of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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