Summary
The dependence of the 720 cm−1 I.R. band upon the temperature has been investigated for isotactic and atactic samples of poly (octadecyl ethylene oxide) and poly (octadecyl ethylene). It is known in fact that a splitting of the band associated with the rocking vibration of methylene sequences can be correlated with orthorhombic packing of these latter.The results indicate that, besides isotactic poly (octadecyl ethylene), also the atactic polyolefin and the isotactic and atactic polyethers have orthorhombic packed chains provided that the temperature is sufficiently low. The orthorhombic to hexagonal transition takes place on a wide temperature range.
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Part II : F. Andruzzi, D. Lupinacci, and P. L. Magagnini, Macromolecules, in press
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Benedetti, E., Vergamini, P., Andruzzi, F. et al. Temperature dependence of the 720 cm−1 IR band of poly(octadecyl ethylene) and poly(octadecyl ethylene oxide) studies on comb-like polymers III. Polymer Bulletin 2, 241–247 (1980). https://doi.org/10.1007/BF00282281
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DOI: https://doi.org/10.1007/BF00282281