HAN, YK KIM, DY KIM, YH 2024-01-21T23:10:06Z 2024-01-21T23:10:06Z 2022-01-10 1992-05 0887-624X https://pubs.kist.re.kr/handle/201004/146446 New thermotropic liquid crystalline poly(malonic ester)s with two symmetrical mesogenic units (paired mesogens) were prepared by the polycondensation of 1,6-dibromohexane and novel malonic ester compounds with different flexible ethyleneoxy spacer lengths linked to azobenzene group. All the prepared malonic esters and the resulting polymers exhibited monotropic liquid crystallinity with a nematic texture. The length of the spacer had influence on the temperature of phase transition of them. A possibility of application of the prepared polymers to reversible optical information storage media was also identified through a trans-cis isomerization of azobenzene by UV irradiation. English JOHN WILEY & SONS INC ERASABLE HOLOGRAMS SYNTHESIS AND CHARACTERIZATION OF NEW THERMOTROPIC LIQUID-CRYSTALLINE POLYMERS WITH PAIRED MESOGENS CONTAINING AZOBENZENE UNIT - POLY(MALONIC ESTER)S Article 10.1002/pola.1992.080300625 1 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.30, no.6, pp.1177 - 1185 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 30 6 1177 1185 scie scopus A1992HN86200025 2-s2.0-0026868215 Polymer Science Polymer Science Article ERASABLE HOLOGRAMS THERMOTROPIC LIQUID CRYSTALLINE MALONIC ESTERS THERMOTROPIC LIQUID CRYSTALLINE POLY(MALONIC ESTER)S PAIRED MESOGENS MONOTROPIC NEMATIC TEXTURE SPACER LENGTH EFFECT REVERSIBLE OPTICAL DATA STORAGE TRANS-CIS PHOTOISOMERIZATION