Liquid crystal aligning capabilities on new photo-crosslinkable polyimide based polymer by the photodimerization method

Jeoung Yeon Hwang; Yong Bae Kim; Dae Shik Seo

doi:10.1080/713716498

Liquid crystal aligning capabilities on new photo-crosslinkable polyimide based polymer by the photodimerization method

Jeoung Yeon Hwang, Yong Bae Kim, Dae Shik Seo

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We studied the liquid crystal (LC) alignment and pretilt angle generation for a nematic (N) LC using a photodimerization method on various new photo-crosslinkable polyimide based polymer. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450C. High pretilt angle of the NLC was obtained by polarized UV exposure on the photopolymers containing biphenyl (BP), decyl (de), and cholesteryl (chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing fluorine and chalcone group. The high NLC pretilt angle generated is attributable to the biphenyl, alkyl moieties, and photodimerized chalcone group of the photopolymer. Also, a good the electro-optical (EO) characteristics in the TN-LCD photoaligned with UV exposure of 30 on the photopolymer surface can be achieved.

Original language	English
Pages (from-to)	127-137
Number of pages	11
Journal	Ferroelectrics
Volume	278
DOIs	https://doi.org/10.1080/713716498
Publication status	Published - 2002 Jan 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1080/713716498

Cite this

@article{8599afd3626b43fb9dc7e1ba89f1e62d,

title = "Liquid crystal aligning capabilities on new photo-crosslinkable polyimide based polymer by the photodimerization method",

abstract = "We studied the liquid crystal (LC) alignment and pretilt angle generation for a nematic (N) LC using a photodimerization method on various new photo-crosslinkable polyimide based polymer. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450C. High pretilt angle of the NLC was obtained by polarized UV exposure on the photopolymers containing biphenyl (BP), decyl (de), and cholesteryl (chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing fluorine and chalcone group. The high NLC pretilt angle generated is attributable to the biphenyl, alkyl moieties, and photodimerized chalcone group of the photopolymer. Also, a good the electro-optical (EO) characteristics in the TN-LCD photoaligned with UV exposure of 30 on the photopolymer surface can be achieved.",

author = "Hwang, {Jeoung Yeon} and Kim, {Yong Bae} and Seo, {Dae Shik}",

year = "2002",

month = jan,

day = "1",

doi = "10.1080/713716498",

language = "English",

volume = "278",

pages = "127--137",

journal = "Ferroelectrics",

issn = "0015-0193",

publisher = "Taylor and Francis Ltd.",

}

TY - JOUR

T1 - Liquid crystal aligning capabilities on new photo-crosslinkable polyimide based polymer by the photodimerization method

AU - Hwang, Jeoung Yeon

AU - Kim, Yong Bae

AU - Seo, Dae Shik

PY - 2002/1/1

Y1 - 2002/1/1

N2 - We studied the liquid crystal (LC) alignment and pretilt angle generation for a nematic (N) LC using a photodimerization method on various new photo-crosslinkable polyimide based polymer. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450C. High pretilt angle of the NLC was obtained by polarized UV exposure on the photopolymers containing biphenyl (BP), decyl (de), and cholesteryl (chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing fluorine and chalcone group. The high NLC pretilt angle generated is attributable to the biphenyl, alkyl moieties, and photodimerized chalcone group of the photopolymer. Also, a good the electro-optical (EO) characteristics in the TN-LCD photoaligned with UV exposure of 30 on the photopolymer surface can be achieved.

AB - We studied the liquid crystal (LC) alignment and pretilt angle generation for a nematic (N) LC using a photodimerization method on various new photo-crosslinkable polyimide based polymer. A good thermal stability of the photopolymers was measured by thermogravimatric analysis (TGA) measurement until 450C. High pretilt angle of the NLC was obtained by polarized UV exposure on the photopolymers containing biphenyl (BP), decyl (de), and cholesteryl (chal) group, respectively. However, low pretilt angle of the NLC was measured by polarized UV exposure on the photopolymers containing fluorine and chalcone group. The high NLC pretilt angle generated is attributable to the biphenyl, alkyl moieties, and photodimerized chalcone group of the photopolymer. Also, a good the electro-optical (EO) characteristics in the TN-LCD photoaligned with UV exposure of 30 on the photopolymer surface can be achieved.

UR - http://www.scopus.com/inward/record.url?scp=33746271596&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33746271596&partnerID=8YFLogxK

U2 - 10.1080/713716498

DO - 10.1080/713716498

M3 - Article

AN - SCOPUS:33746271596

SN - 0015-0193

VL - 278

SP - 127

EP - 137

JO - Ferroelectrics

JF - Ferroelectrics

ER -

Liquid crystal aligning capabilities on new photo-crosslinkable polyimide based polymer by the photodimerization method

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this