Thermal reaction of cinnamate oligomers and their effect on the orientational stability of liquid crystals

Hyundae Hah; Shi Joon Sung; Jung Ki Park

doi:10.1143/JJAP.45.6442

Thermal reaction of cinnamate oligomers and their effect on the orientational stability of liquid crystals

Hyundae Hah, Shi Joon Sung, Jung Ki Park

Division of Energy Techonology

Korea Advanced Institute of Science and Technology

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

Abstract

Cinnamate groups are well-known for a dimerization reaction upon exposure to ultraviolet irradiation and a thermal reaction after being heated. In this study, to verify the thermal reaction of the cinnamate group in detail, we investigated the thermal crosslinking of cinnamate oligomers. The thermal reaction of cinnamate oligomers of low molecular weight is induced more readily by thermal energy compared with that of cinnamate polymers. This reaction is attributed to a radical reaction involving the carbon-carbon double bond in the cinnamate group. The orientation of the liquid crystal depended on the length of the spacers in the cinnamate oligomers.

Original language	English
Pages (from-to)	6442-6444
Number of pages	3
Journal	Japanese Journal of Applied Physics
Volume	45
Issue number	8 A
DOIs	https://doi.org/10.1143/JJAP.45.6442
State	Published - 4 Aug 2006

Keywords

Cinnamate oligomer
Direction of LC orientation
Liquid crystal alignment
Thermal crosslinking
Thermal stability

Access to Document

10.1143/JJAP.45.6442

Cite this

@article{5e6316fcf9d74bbcba4c948d7e3609f7,

title = "Thermal reaction of cinnamate oligomers and their effect on the orientational stability of liquid crystals",

abstract = "Cinnamate groups are well-known for a dimerization reaction upon exposure to ultraviolet irradiation and a thermal reaction after being heated. In this study, to verify the thermal reaction of the cinnamate group in detail, we investigated the thermal crosslinking of cinnamate oligomers. The thermal reaction of cinnamate oligomers of low molecular weight is induced more readily by thermal energy compared with that of cinnamate polymers. This reaction is attributed to a radical reaction involving the carbon-carbon double bond in the cinnamate group. The orientation of the liquid crystal depended on the length of the spacers in the cinnamate oligomers.",

keywords = "Cinnamate oligomer, Direction of LC orientation, Liquid crystal alignment, Thermal crosslinking, Thermal stability",

author = "Hyundae Hah and Sung, {Shi Joon} and Park, {Jung Ki}",

year = "2006",

month = aug,

day = "4",

doi = "10.1143/JJAP.45.6442",

language = "English",

volume = "45",

pages = "6442--6444",

journal = "Japanese Journal of Applied Physics",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

number = "8 A",

}

TY - JOUR

T1 - Thermal reaction of cinnamate oligomers and their effect on the orientational stability of liquid crystals

AU - Hah, Hyundae

AU - Sung, Shi Joon

AU - Park, Jung Ki

PY - 2006/8/4

Y1 - 2006/8/4

N2 - Cinnamate groups are well-known for a dimerization reaction upon exposure to ultraviolet irradiation and a thermal reaction after being heated. In this study, to verify the thermal reaction of the cinnamate group in detail, we investigated the thermal crosslinking of cinnamate oligomers. The thermal reaction of cinnamate oligomers of low molecular weight is induced more readily by thermal energy compared with that of cinnamate polymers. This reaction is attributed to a radical reaction involving the carbon-carbon double bond in the cinnamate group. The orientation of the liquid crystal depended on the length of the spacers in the cinnamate oligomers.

AB - Cinnamate groups are well-known for a dimerization reaction upon exposure to ultraviolet irradiation and a thermal reaction after being heated. In this study, to verify the thermal reaction of the cinnamate group in detail, we investigated the thermal crosslinking of cinnamate oligomers. The thermal reaction of cinnamate oligomers of low molecular weight is induced more readily by thermal energy compared with that of cinnamate polymers. This reaction is attributed to a radical reaction involving the carbon-carbon double bond in the cinnamate group. The orientation of the liquid crystal depended on the length of the spacers in the cinnamate oligomers.

KW - Cinnamate oligomer

KW - Direction of LC orientation

KW - Liquid crystal alignment

KW - Thermal crosslinking

KW - Thermal stability

UR - http://www.scopus.com/inward/record.url?scp=33748571174&partnerID=8YFLogxK

U2 - 10.1143/JJAP.45.6442

DO - 10.1143/JJAP.45.6442

M3 - Article

AN - SCOPUS:33748571174

SN - 0021-4922

VL - 45

SP - 6442

EP - 6444

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 8 A

ER -

Thermal reaction of cinnamate oligomers and their effect on the orientational stability of liquid crystals

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this