Magnetic Field Induced Orientation in Diblock Copolymers with One Crystallizable Block
2005; American Chemical Society; Volume: 38; Issue: 17 Linguagem: Inglês
10.1021/ma050081p
ISSN1520-5835
AutoresTs. Grigorova, Stergios Pispas, Nikos Hadjichristidis, Thomas Thurn‐Albrecht,
Tópico(s)Material Dynamics and Properties
ResumoUsing wide-angle X-ray scattering, we show that diblock copolymers with one crystallizable block can be oriented by crystallization in a strong magnetic field (B = 7 T). The resulting structure consists of a stack of alternating crystalline and amorphous layers of different chemical compositions with the layer normal being oriented perpendicular to the applied field. As a necessary prerequisite the crystallization process has to start with a high nucleation density. Orientation parameters of about S ≈ −0.3 have been achieved. This approach presents a novel route to produce oriented chemically heterogeneous nanostructured materials.
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