Preliminary observations of defects in a polymeric nematic phase

Some optical observations of defects (disclination lines) in a polyester nematic phase are presented. These observations clearly show the predominance of lines of half integer strength. This result, as well as other observations, seem to fit in with large values of the splay and bend constants K 1 a...

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Bibliographic Details
Published in:Polymer (Guilford) 1983-03, Vol.24 (3), p.295-299
Main Authors: Kléman, M., Liébert, L., Strzelecki, L.
Format: Article
Language:English
Subjects:
core structure
Defects
disclination lines
nematic phase
polyester
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Summary:Some optical observations of defects (disclination lines) in a polyester nematic phase are presented. These observations clearly show the predominance of lines of half integer strength. This result, as well as other observations, seem to fit in with large values of the splay and bend constants K 1 and K 3 compared with the twist constant K 2. However, K 1 seems to be much larger than K 3. Interesting phenomena related to disclination core structure and to the surface lines, involving a particular molecular distribution in the surface, are described.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(83)90266-5