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Sulfonated poly(ethylene‐ran‐styrene) ionomers

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Ionomers were prepared by partially sulfonating the styrene units of a poly(ethylene‐ran‐styrene) (ES) copolymer. The metal salt derivatives of sulfonated ES had higher T g, melt viscosity and rubbery modulus than did the parent ES because of the formation of labile, physical crosslinks from intermolecular dipole–dipole associations between metal sulfonate groups. Microphase separation of ion‐rich aggregates with a characteristic size of 3–9 nm also occurred as a result of the strong intermolecular associations. Copyright © 2005 Society of Chemical Industry
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Keywords: ethylene–styrene interpolymer; ionomer; sulfonation

Document Type: Research Article

Affiliations: Department of Chemical Engineering, University of Connecticut, Storrs, CT 06269-3136, USA

Publication date: August 1, 2005

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