First observation of an ordered microphase in melts of poly(oxyethylene)-poly(oxypropylene) block copolymers

J. Patrick, J.P.A. Fairclough, G.E. Yu, S.M. Mai, M. Crothers, K. Mortensen, A.J. Ryan, Booth,C.

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    Abstract

    The first observation of ordered microphase structures in poly(oxyethylene)-poly(oxypropylene) diblock copolymers melts is reported. Two diblock copolymers were synthesised by anionic polymerisation, i.e. E130P58 and E107P69 where E represents an oxyethylene unit, OCH2CH2, and P an oxypropylene unit, OCH2CH(CH3). The volume fractions of the two components were in the range 0.5-0.6. Order in the melt phase was confirmed by small angle X-ray scattering, and order-to-disorder transitions (ODT) were located at 106 degrees C (E130P58) and 114 degrees C (E107P69). In a related experiment, a triblock copolymer with perdeuterated P blocks, E(33)dP(42)E(33), was synthesised and studied in the melt phase by small-angle neutron scattering. This allowed determination of the temperature dependence of the Flory-Huggins interaction parameter for the poly(oxyethylene)-poly(oxypropylene) system, i.e. chi = 20.2/T + 0.0221.
    Original languageEnglish
    JournalPhysical Chemistry Chemical Physics
    Volume2
    Issue number7
    Pages (from-to)1503-1507
    ISSN1463-9076
    DOIs
    Publication statusPublished - 2000

    Cite this

    Patrick, J., Fairclough, J. P. A., Yu, G. E., Mai, S. M., Crothers, M., Mortensen, K., Ryan, A. J., & Booth,C. (2000). First observation of an ordered microphase in melts of poly(oxyethylene)-poly(oxypropylene) block copolymers. Physical Chemistry Chemical Physics, 2(7), 1503-1507. https://doi.org/10.1039/a909182c