Networks of gel-forming triblock copolymer solutions: In situ SANS and rheological measurements

K. Mortensen, K. Almdal, R. Kleppinger, N. Mischenko, H. Reynaers

    Research output: Contribution to journalJournal articleResearch

    Abstract

    Triblock copolymers in a solvent, selective for their middle blocks provide the basis for the formation of novel physical networks where cross-links are formed by self-assembled domains of the end-blocks. Triblock copolymers of poly(styrene)-poly(ethylene,butylene)-poly(styrene) (SEBS) dissolved in a mixture of aliphatic and alicyclic compounds constitute such a network system. Using a Rheometrics RSA-2 instrument modified for in situ measurements of small-angle neutron scattering and rheology provides a unique possibility far detailed understanding thermodynamics of such a gel. The self-association of the PS-blocks do not only promote formation of highly inter-connected end-block domains, but within a narrow temperature range these domains furthermore constitute a network with body-centered cubic (BCC) microstructure. Upon large amplitude oscillating shear the polycrystalline soft gel can be aligned into a twinned BCC monodomain. (C) 1998 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    JournalPhysica B: Condensed Matter
    Volume241-243
    Pages (from-to)1025-1028
    ISSN0921-4526
    DOIs
    Publication statusPublished - 1998

    Fingerprint Dive into the research topics of 'Networks of gel-forming triblock copolymer solutions: In situ SANS and rheological measurements'. Together they form a unique fingerprint.

    Cite this