Summary
The lattice modes of polyethylene with the phase differences (θ andΦ along theα-axis and theb-axis were calculated at intervals of 30‡ for the phase differences. They wereT x, Ty, T′x, T′y, R′z andR′ z, and some special conditions of the phase differences separated the six modes. To know the reliability of the intermolecular force constants used in this calculation, the elastic moduli of polyethylene crystal along thea-axis and theb-axis were calculated with the modified potential functions and compared with the observed values.
Zusammenfassung
Die Gitterschwingungen in PolyÄthylen mit den Phasendifferenzenθ undΦ lÄngs dera- undb-Achsen wurden in Intervallen von 30‡ der Phasendifferenzen berechnet. Das gibt 6 Hauptschwingungen,T x, Ty, Tx′,T y′, Rz und Rz′. Um die ZuverlÄssigkeit der intermolekularen Kraftkonstanten, die bei diesen Berechnungen verwendet wurden, zu prüfen, wurden die elastischen Moduln von PolyÄthylen-Kristallen in Richtung dera- undb-Achse unter bestimmten modifizierten PotentialverlÄufen berechnet und mit den beobachteten Werten verglichen.
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Enomoto, S., Asahina, M. Lattice modes of polyethylene. Kolloid-Z.u.Z.Polymere 196, 36–47 (1964). https://doi.org/10.1007/BF01500024
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DOI: https://doi.org/10.1007/BF01500024