Mechanisms of liquid crystal alignment on buffed polyimide surfaces

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

doi:10.1557/proc-345-247

Mechanisms of liquid crystal alignment on buffed polyimide surfaces

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

Research output: Contribution to journal › Conference article › peer-review

7 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 language	English
Pages (from-to)	247-253
Number of pages	7
Journal	Materials Research Society Symposium - Proceedings
Volume	345
DOIs	https://doi.org/10.1557/proc-345-247
Publication status	Published - 1994
Externally published	Yes
Event	Proceedings of the 1994 MRS Spring Meeting - San Francisco, CA, USA Duration: Apr 4 1994 → Apr 8 1994

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1557/proc-345-247

Cite this

@article{5b0a8cb23bea43d599c22fcb772313aa,

title = "Mechanisms of liquid crystal alignment on buffed polyimide surfaces",

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.",

author = "Hirotsugu Kikuchi and Logan, {J. A.} and Yoon, {Do Y.}",

year = "1994",

doi = "10.1557/proc-345-247",

language = "English",

volume = "345",

pages = "247--253",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Proceedings of the 1994 MRS Spring Meeting ; Conference date: 04-04-1994 Through 08-04-1994",

}

TY - JOUR

T1 - Mechanisms of liquid crystal alignment on buffed polyimide surfaces

AU - Kikuchi, Hirotsugu

AU - Logan, J. A.

AU - Yoon, Do Y.

PY - 1994

Y1 - 1994

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0028731916&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028731916&partnerID=8YFLogxK

U2 - 10.1557/proc-345-247

DO - 10.1557/proc-345-247

M3 - Conference article

AN - SCOPUS:0028731916

SN - 0272-9172

VL - 345

SP - 247

EP - 253

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1994 MRS Spring Meeting

Y2 - 4 April 1994 through 8 April 1994

ER -

Mechanisms of liquid crystal alignment on buffed polyimide surfaces

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this