Title

Synthesis and Characterization of Star-Branched Ionomers Composed of Sulfonated Polystyrene Outer Blocks and Elastomeric Inner Blocks

Document Type

Article

Publication Date

7-21-1989

Department

Polymers and High Performance Materials

Abstract

Star-branched ionomers composed of short sulfonated polystyrene outer blocks and hydrogenated butadiene or isoprene inner blocks, with narrow molecular weight distributions (13C and 1H NMR and FT-IR revealed > 99% hydrogenation using p-toluene sulfonyl hydrazide in refluxing toluene. Titration of the sulfonic acid groups revealed > 85% sulfonation of the styrene units by acetyl sulfate in methylene chloride. Characterization of the final product and the various intermediates was carried out by GPC, DSC, FT-IR, and 13C NMR. A summary of the developmental work leading to these new materials is presented.

Publication Title

ACS Symposium Series

Volume

395

First Page

330

Last Page

352

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