Effect of urethane acrylate oligomer and UV curing temperature on electro-optical property of polymer-dispersed liquid crystal

Seok Hwan Chung; Eun Kyung Gil; Hee Yeon Noh; Soon Moon Jeong; Byeongdae Choi

doi:10.1080/15421406.2014.940486

Effect of urethane acrylate oligomer and UV curing temperature on electro-optical property of polymer-dispersed liquid crystal

Seok Hwan Chung, Eun Kyung Gil, Hee Yeon Noh, Soon Moon Jeong, Byeongdae Choi

Daegu Gyeongbuk Institute of Science and Technology

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

Abstract

Polymer-dispersed liquid crystal (PDLC) films were prepared by photopolymerization after substituting the reactive diluent monomer 2-ethylhexyl acrylate with an aliphatic urethane acrylate (UA) oligomer in a conventional pre-polymer (PN393). The effects of UA concentration and UV curing temperature on the PDLC films' physical properties were examined. The average LC droplet size decreased with increasing UA concentration. The driving voltage decreased by 30% and the response time increased by 26%. The PDLC films with 30 wt% of UA showed the lowest driving voltage and the highest contrast ratio when the LC pre-polymer mixture was UV-cured slightly above the nematic-isotropic coexistence temperature.

Original language	English
Pages (from-to)	1-10
Number of pages	10
Journal	Molecular Crystals and Liquid Crystals
Volume	601
Issue number	1
DOIs	https://doi.org/10.1080/15421406.2014.940486
State	Published - 22 Sep 2014

Bibliographical note

Publisher Copyright:
© Taylor & Francis Group, LLC.

Keywords

Electro-optical property
Photopolymerization
Polymer-dispersed liquid crystal (PDLC)
Pre-polymer
UV curing temperature
Urethane acrylate

Access to Document

10.1080/15421406.2014.940486

Cite this

@article{cd084760909e4ec7bf327a7f81fbdb9b,

title = "Effect of urethane acrylate oligomer and UV curing temperature on electro-optical property of polymer-dispersed liquid crystal",

abstract = "Polymer-dispersed liquid crystal (PDLC) films were prepared by photopolymerization after substituting the reactive diluent monomer 2-ethylhexyl acrylate with an aliphatic urethane acrylate (UA) oligomer in a conventional pre-polymer (PN393). The effects of UA concentration and UV curing temperature on the PDLC films' physical properties were examined. The average LC droplet size decreased with increasing UA concentration. The driving voltage decreased by 30\% and the response time increased by 26\%. The PDLC films with 30 wt\% of UA showed the lowest driving voltage and the highest contrast ratio when the LC pre-polymer mixture was UV-cured slightly above the nematic-isotropic coexistence temperature.",

keywords = "Electro-optical property, Photopolymerization, Polymer-dispersed liquid crystal (PDLC), Pre-polymer, UV curing temperature, Urethane acrylate",

author = "Chung, \{Seok Hwan\} and Gil, \{Eun Kyung\} and Noh, \{Hee Yeon\} and Jeong, \{Soon Moon\} and Byeongdae Choi",

note = "Publisher Copyright: {\textcopyright} Taylor \& Francis Group, LLC.",

year = "2014",

month = sep,

day = "22",

doi = "10.1080/15421406.2014.940486",

language = "English",

volume = "601",

pages = "1--10",

journal = "Molecular Crystals and Liquid Crystals",

issn = "1542-1406",

publisher = "Taylor and Francis Ltd.",

number = "1",

}

TY - JOUR

T1 - Effect of urethane acrylate oligomer and UV curing temperature on electro-optical property of polymer-dispersed liquid crystal

AU - Chung, Seok Hwan

AU - Gil, Eun Kyung

AU - Noh, Hee Yeon

AU - Jeong, Soon Moon

AU - Choi, Byeongdae

N1 - Publisher Copyright: © Taylor & Francis Group, LLC.

PY - 2014/9/22

Y1 - 2014/9/22

N2 - Polymer-dispersed liquid crystal (PDLC) films were prepared by photopolymerization after substituting the reactive diluent monomer 2-ethylhexyl acrylate with an aliphatic urethane acrylate (UA) oligomer in a conventional pre-polymer (PN393). The effects of UA concentration and UV curing temperature on the PDLC films' physical properties were examined. The average LC droplet size decreased with increasing UA concentration. The driving voltage decreased by 30% and the response time increased by 26%. The PDLC films with 30 wt% of UA showed the lowest driving voltage and the highest contrast ratio when the LC pre-polymer mixture was UV-cured slightly above the nematic-isotropic coexistence temperature.

AB - Polymer-dispersed liquid crystal (PDLC) films were prepared by photopolymerization after substituting the reactive diluent monomer 2-ethylhexyl acrylate with an aliphatic urethane acrylate (UA) oligomer in a conventional pre-polymer (PN393). The effects of UA concentration and UV curing temperature on the PDLC films' physical properties were examined. The average LC droplet size decreased with increasing UA concentration. The driving voltage decreased by 30% and the response time increased by 26%. The PDLC films with 30 wt% of UA showed the lowest driving voltage and the highest contrast ratio when the LC pre-polymer mixture was UV-cured slightly above the nematic-isotropic coexistence temperature.

KW - Electro-optical property

KW - Photopolymerization

KW - Polymer-dispersed liquid crystal (PDLC)

KW - Pre-polymer

KW - UV curing temperature

KW - Urethane acrylate

UR - http://www.scopus.com/inward/record.url?scp=84945190634&partnerID=8YFLogxK

U2 - 10.1080/15421406.2014.940486

DO - 10.1080/15421406.2014.940486

M3 - Article

AN - SCOPUS:84945190634

SN - 1542-1406

VL - 601

SP - 1

EP - 10

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

IS - 1

ER -

Effect of urethane acrylate oligomer and UV curing temperature on electro-optical property of polymer-dispersed liquid crystal

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this