Polycarbonate (PC)/vapor‐grown carbon fiber (VGCF?) composite was prepared through melt compounding. It was unexpectedly found from differential scanning calorimetry (DSC) and wide angle X‐ray diffraction (WAXD) that the crystallization of PC was substantially accelerated in the presence of the ordered graphite surface of VGCF?. To make an aligned structure of PC crystallization together with the orientation of VGCF?, a magnetic field of 2.4 T was applied to the composite under several temperature profiles. The WAXD pattern revealed that not only dispersed VGCF? but also matrix PC crystallization was magnetically aligned through the optimization of processes. The evidence for PC crystallization by VGCF? with and without magnetic force is described.
Optical micrograph (a) and WAXD pattern (b) of PC/VGCF? (95:5 wt. ratio) composite which was treated under a magnetic field (vertical direction) of 2.4 T under an optimized heating profile.
