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Liquid crystalline polyesters prepared by flexible spacers with rigid spiral moieties: synthesis and characterization.

Different monomeric diols, with a central rigid FD unit connected with two aliphatic chains of
various length, were prepared to react with aromatic mesogenic triad, TOBC. In this manner,
thermotropic polyesters with possible low thermal transition temperatures (including Tmand Ti) and high solubility in organic solvent can be
generated in view of the non-linear polymeric chain imposed by the rigid, bent FD moieties.
In addition to the effect of the aliphatic chain length, polyesters of different molecular weight
will be obtained by different synthesis approach (or fractionation of the resulting polyester
product) and therefore, the influence of molecular weight on liquid crystalline properties
can be evaluated.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0710101-144501
Date10 July 2001
CreatorsZheng, Weideng
ContributorsAn-Chung Su, Lieh-Li Lin, Ming Chen, Jin-Long Hong
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0710101-144501
Rightsunrestricted, Copyright information available at source archive

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