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Study of polymer‐network structure on polymer‐stabilized blue phase
Author(s) -
Kwak Musun,
Park Jungwoo,
Jeon Jongho,
Kim Kyoungri,
Yi Yoonseon,
Choi Donsik,
Choi Youngseok,
Jeong Kyongdeuk
Publication year - 2011
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid19.9.576
Subject(s) - disclination , polymer , materials science , phase (matter) , acetone , layer (electronics) , liquid crystal , hexane , liquid crystal display , deformation (meteorology) , chemical engineering , chemical physics , composite material , optoelectronics , chromatography , chemistry , organic chemistry , engineering
— To understand the mechanism of the disclination defect of the liquid‐crystal (LC) phase, this study was conducted to directly analyze the polymer‐network (PN) structure of polymer‐stabilized blue phase (PSBP), which is minutely formed on all LC layers. The PN was examined after first removing the glass decap and then the LC. Important to note is that the removal of the glass decap did not affect or damage the PN structure. The PN was determined to be a stable structure without any change to the thickness of the layer. When removing the LC, both hexane and acetone solutions were used. Moreover, there was no structural deformation to the PN when using the hexane solution. The results of the study show that the actual size of the polymer chain is in fact 50–60 nm, five times larger than previous theories which estimated the size to be only 10 nm. In addition, this study confirmed that the pores between the PN are 100–200 nm. The PN structure was shown to be susceptible to change based on different heating temperatures. In summation, now that defect lines of a LC display (LCD) could be directly measured, further progress and development in the theoretical interpretations of the Kerr effect on PSBP can be realized.