Small-angle neutron scattering from poly(NIPA-co-AMPS) gels

J. Travas-Sejdic, A. Easteal, R. Knott, J.S. Pedersen

    Research output: Contribution to journalConference articleResearchpeer-review


    The microstructure of the poly( N-isopropylacrylamide-co-acrylamido- 2-methyl-1-propane sulphonic acid) gel, poly( NIPA-co-AMPS), was investigated as a function of temperature and cross-link density using the small angle neutron scattering technique. The sample temperature was varied in the range 30 to 55C. Two different behaviours of poly( NIPA-co-AMPS) gels were observed. At low temperature (30C), the magnitude of the scattered intensity increased with cross-link density suggesting that additional cross-links introduced more inhomogeneities in the gel network. At high temperatures the trend was reversed; that is the lower cross-link density, the higher the scattered intensity. Therefore, the role of cross-links at high temperature was to suppress microphase separation. The fitting of the experimental data with the Rabin and Panyukov theory indicated qualitative agreement.
    Original languageEnglish
    JournalJournal of Applied Crystallography
    Issue number1
    Pages (from-to)735-739
    Publication statusPublished - 2000
    Event11th International Conference on Small-Angle Scattering - New York, United States
    Duration: 17 May 199920 May 1999
    Conference number: 11


    Conference11th International Conference on Small-Angle Scattering
    CountryUnited States
    CityNew York

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