Thermotropic liquid crystalline behavior of cholesterol-linked hydroxyethyl cellulose

• Published in: Journal of applied polymer science Vol. 72; no. 6; pp. 763 - 770
• Main Authors: Shaikh, V. A. E., Maldar, N. N., Lonikar, S. V., Rajan, C. R., Ponrathnam, S.
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Inc 09.05.1999; Wiley
• Subjects: Applied sciences; Cellulose and derivatives; Cellulose derivatives; Cholesterol; Composition effects; Cooling; Exact sciences and technology; Heating; hydroxyethyl cellulose; Infrared spectroscopy; Light polarization; monocholesterylsuccinate; Natural polymers; Optical microscopy; Phase transitions; Physicochemistry of polymers; polarizing optical microscopy; thermotropic; Thermotropic liquid crystals; Molecular structure; Thermotropic state; Substituent; Experimental study; Phase transitions; Cholesterol; Esterification; Chemical modification; Optical texture; Liquid crystal polymers; Preparation; Cellulose derivatives; Succinic acid; Property structure relationship; Cellulose(hydroxyethyl)
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/(SICI)1097-4628(19990509)72:6<763::AID-APP4>3.0.CO;2-M

A series of monocholesterylsuccinate (ChMS) derivatives of hydroxyethyl cellulose (HEC) were prepared with degree of substitution ranging from 0.6 to 2.0. They were characterized by ChMS content, infrared spectroscopy, polarizing microscopy, and differential scanning calorimetry. All these polymers displayed thermotropic liquid crystalline behavior on heating as well as on cooling. The transformation temperature was found to be influenced by the degree of substitution. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 763–770, 1999