Journal
MACROMOLECULES
Volume 40, Issue 5, Pages 1693-1697Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma061342d
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Poly(butylene terephthalate) electrospun fibers were analyzed by a thermally stimulated current (TSC) technique. In the absence of an electric field, a spontaneous current was released near the glass transition, indicating a dipole relaxation process. A monotonic increase in current generated by dissipation of residual was observed with increasing temperature below the melting point. A peak in the charge dissipation current near the melting point indicates that a substantial amount of residual charge is trapped within or at the interface of the crystalline phase. Molecular orientation was also probed by birefringence analysis. Electrospun fibers showed a high level of birefringence, which extinguished upon melting.
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