Abstract
Syndiotactic polystyrene with a high degree of stereoregularity and crystallinity has been prepared in the form of thin, electron-transmissible films. The morphology has been studied by transmission electron microscopy. The results were similar to those for isotactic polystyrene except for a significantly larger lamellar growth rate. High-energy electron diffraction gave the following structural data for syndiotactic polystyrene: space group P62 c, a = 26.25(5) A ̊ , c = 5.045(8) A ̊ , Z = 18 for the CH 2CH(C 6H 5) unit, ρ th = 1.033 g cm −3. The macromolecular backbone chain is planar zigzag ( 4∗1 1 ). Three macromolecules form clusters of two types of handedness. Ordering of these clusters results in a well pronounced superstructure ( a = √3 a b), but partial ordering has also been observed and is probably caused by radiation damage and/or rapid crystallization.
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