The morphology of the grown crystals has been investigated in relation to the inherent structures of the original PVC samples. The electron diffraction pattern for the obtained crystals gave very faint spots, but these spots disappeared within about 20 sec so that only three diffraction rings were taken as leute kennenlernen niederösterreich electron diffraction diagram.
These three diffraction rings suggest that the crystals obtained in this study will have the same orthorhombic unit cell as presented by Natta and Corradini for bulk-crystallized oriented PVC. A conformational investigation on PVC chain led to that the energy required to form folds will occupy considerably large part of the total free energy for PVC single crystal formation.
The observable number of well-defined lamellae decreased with increasing polymerization temperature. Tacticity of PVC chain, rather than branching, is concluded to contribute more strongly to the observed morphological results.
Die beobachtete Anzahl wohl definierter Lamellen nahm mit steigender Polymerisationstemperatur ab, die Taktizität der PVC-Ketten mehr als die Verzweigung dürfte stärker zu den beobachteten morphologischen Resultaten beitragen. This is a preview of subscription content, log in to check access. Access options Instant access to the full article PDF.
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