Pressure dependence of the order-disorder transition in several diblock copolymers studied with SANS

D. Schwahn, H. Frielinghaus, K. Mortensen, K. Almdal

    Research output: Contribution to journalJournal articleResearch

    Abstract

    Thermal composition fluctuations in three diblock copolymers were studied with SANS as a function of temperature and pressure (0.1-200 MPa). In all cases the phase diagram shows an unusual shape insofar as with increasing pressure the order disorder temperature T(ODT) first decreases and then increases. The pressure induced changes of T(ODT) are caused by the increase of the enthalpic and entropic terms of the Flory-Huggins parameter. (C) 1998 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    JournalPhysica B: Condensed Matter
    Volume241-243
    Pages (from-to)1029-1031
    ISSN0921-4526
    DOIs
    Publication statusPublished - 1998

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