Enhancement of the high-temperature utility of a polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene block copolymer by friedel–crafts naphthoylation

Authors

  • Allan S. Jones,

    1. Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
    Current affiliation:
    1. W.R. Grace Co., Cambridge, MA 02140
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  • Timothy Wright,

    1. Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
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  • Malcolm A. Smook,

    1. Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
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  • H. James Harwood

    Corresponding author
    1. Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
    • Maurice Morton Institute of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
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Abstract

A procedure was developed for the Friedel–Crafts naphthoylation of the polystyrene segments of a polystyrene-b-poly(ethylene-co-butene)-b-polystyrene (SEBS) triblock copolymer. It was possible to obtain up to 72% 1-naphthoylation or 100% 2-naphthoylation of the polystyrene segments in the copolymer. Naphthoylation could also be accomplished using trifluoromethanesulfonic acid as a catalyst. The naphthoylated products were characterized by 1H-NMR spectroscopy, size-exclusion chromatography, and dynamic mechanical thermal analysis. The mechanical properties of the original and naphthoylated polymers were measured from 25 to 125°C. The results obtained indicate that naphthoylation enhances the tensile properties of the polymers at elevated temperatures. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 1289–1295, 2003

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