Mechanisms of liquid crystal alignment on buffed polyimide surfaces

Hirotsugu Kikuchi, J. A. Logan, Do Y. Yoon

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)

Abstract

The surfaces of poly(amic acid) and cured polyimide films, subjected to different buffing and cure profiles, have been examined by atomic force microscopy (AFM). The ability of these buffed polymer surfaces to align nematic and chiral smectic C liquid crystals were also investigated. These studies show that the presence of microgrooves on buffed polymer surfaces are not necessary for alignment of liquid crystals. Rather, it is concluded that the liquid crystal alignment is mainly caused by the anisotropic intermolecular interactions between liquid crystal molecules and the polymer chains oriented by buffing. For the alignment of smectics, both the degree of order and mechanical properties of polyimide films are found to be important factors.

Original languageEnglish
Pages (from-to)247-253
Number of pages7
JournalMaterials Research Society Symposium - Proceedings
Volume345
Publication statusPublished - Dec 1 1994
Externally publishedYes
EventProceedings of the 1994 MRS Spring Meeting - San Francisco, CA, USA
Duration: Apr 4 1994Apr 8 1994

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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