High-Resolution Electron Microscopy of Lamellar Crystals of Syndiotactic Polypropylene.

概要

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Melt-grown lamellar crystals of syndiotactic polypropylene were observed by cryogenic high-resolution transmission electron microscopy. Both the (200) and (020) lattice fringes were successfully recorded. The information about the stacking faults in the lamellar crystals was also recorded in the high-resolution images, as known from the streaked feature of the 020 reflection in the optical diffraction pattern. The processed image using a computer indicated that the persistent length along the b direction of the molecular layers divided by the faulted boundary is very large, and accordingly, the model structure of the stacking faults proposed by Lovinger et al. should hold for the observed specimens.
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