Polymer surface-induced order of liquid crystalline molecular alignment based on nematic-isotropic phase transition behavior

Sung Kyu Hong, Hirotsugu Kikuchi, Tisato Kajiyama

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Alignment order of liquid crystal (LC) molecules at the (polymer/LC) interface was evaluated by comparing nematic-isotropic phase transition temperatures (TNI) at the interface with TNI in the bulk. The thickness dependence of TNI was measured using the LC cell in which an LC thin layer was sandwiched between polymer surfaces without surface treatment. The order of LC molecular alignment at the (polymer/LC) interface increased with surface free energy of the polymer substrate. The surface of crystalline polymer provided higher order of LC molecular alignment. Hydrophobic intermolecular interactions at the (polymer/LC) interface may be more responsible for increase in the interfacial molecular alignment order of LC in comparison with the hydrophilic one.

Original languageEnglish
Pages (from-to)160-166
Number of pages7
JournalPolymer Journal
Volume31
Issue number2
DOIs
Publication statusPublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

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