Abstract
Magnetic-field-induced alignment of syndiotactic polystyrene (sPS) is reported here. Isothermal crystallization of sPS samples from several annealing temperatures was conducted in a 2 or 10 T magnetic field. The isothermal crystallization of low-molecular-weight sPS samples from the annealing temperature, which induced self-seeding, achieved effective alignment of the polymer chains. Azimuthal scans of the samples crystallized in the magnetic field revealed that the b-axis of the β-phase unit cell was aligned parallel to the magnetic field. A low sPS molecular weight and a high magnetic field were effective for a high degree of alignment. Stepwise crystallization from the annealing temperature also induced effective alignment of the sPS. Magnetic-field-induced alignment of low-molecular-weight syndiotactic polystyrene (sPS) has achieved. Isothermal crystallization from the melting state containing local ordered domains under the 2 or 10 T of the magnetic-field-induced alignment of sPS crystals. The crystalized sPS samples formed the β phase, and the b-axis was aligned parallel to the magnetic field. Low molecular weight of sPS and high magnetic field were effective for high alignment degree. A stepwise crystallization attained higher alignment of sPS compared with an isothermal crystallization.
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