Synthesis and characterization of side‐chain liquid crystalline polysiloxanes containing 4‐alkanyloxyphenyl trans‐4‐alkylcyclohexanoate side groups

Chain-Shu Hsu*, Yong H. Lu

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The synthesis and characterization of nine polysiloxanes containing 4‐alkanyloxyphenyl trans‐4‐alkylcyclohexane side groups are described. Six monomers which contain a pentenyloxy of a hexenyloxy flexible spacer display a nematic mesophase, while the other three monomers which contain an undecenyloxy flexible spacer display nematic, smetic A and smectic E mesophases. All synthesized polymers present two smectic mesophases except one containing 4‐hexanyloxyphenyl trans‐4‐n‐butylcyclohexanoate side groups presents one smectic mesophase and one containing 4‐undecanyloxyphenyl trans‐4‐n‐pentylcyclohexanoate side groups presents three smectic mesophases. Trans‐cis isomerization of mesogens and side chain crystallization did not occur for any of the synthesized polymers.

Original languageEnglish
Pages (from-to)977-986
Number of pages10
JournalJournal of Polymer Science Part A: Polymer Chemistry
Volume29
Issue number7
DOIs
StatePublished - 1 Jan 1991

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