Microphase separation in multiblock copolymer melts: Non-conventional morphologies and two-length-scale-switchingстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The phase behavior of AfmNBN/2AN/2B1−fmN multiblock copolymer melts is studied within the
weak segregation theory. The interplay between ordering on different length scales is shown to
cause dramatic changes both in the ordered phase symmetry and periodicity upon small variation of the architectural parameters of the macromolecules. Phase diagrams are presented in the (f,N) plane is the Flory-Huggins parameter for various values of the architecture parameters n and m. Near the critical surface, i.e., for (f −0.5)^2 << 1, such nonconventional cubic phases as the face-centered cubic FCC, simple cubic SC, double gyroid, and the so-called BCC2 (single
gyroid) are found to be stable. The lamellar morphology is shown to be replaced by BCC2, FCC, or SC depending on the structural parameters as the most stable low-temperature phase.