Hai-Bin Yang, A. Natansohn
Sep 1, 1992
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0
Influential Citations
4
Citations
Journal
Macromolecules
Abstract
The polyimines from terephthalaldehyde and 1,10-diaminodecane (PI10) and terephthalaldehyde and 1,8-diaminooctane (PI8) are investigated. PI10 is crystalline and also exhibits a liquid crystalline smectic G phase. PI8 exhibits two crystalline phases before changing to an isotropic melt. X-ray diffractometry and molecular modeling reveal that the mesogenic units in the crystalline phase have both «cis» and «trans» conformations. After the first transition on heating only the more extended trans conformation remains