01896nas a2200229   4500008004100000022001400041245008700055210006900142260006800211300001400279490000800293520106100301653002701362653002101389653001701410100002201427700002801449700003101477700001801508700001901526856012101545       2006                        eng d  a0021-899500aThermotropic behavior of lithocholic acid derivative linked hydroxyethyl cellulose0 aThermotropic behavior of lithocholic acid derivative linked hydr  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAY  a1995-20010 v1003 a<p>Various mesogenic lithocholic acid (LA) derivatives [3-acetyl LA (LAAC); 3-propionyl LA (LAP), 3-cinnamoyl LA (LACin); 3-benzoyl LA (LAB), 3-(4-nitrobenzoyl) LA (LANB); and methyl-3-(3-carboxypropionyl) LA, i.e., LA methyl ester monosuccinate (LAMeMS)] were reacted with hydroxyethyl cellulose (HEC) to obtain a series of LA derivatives of HEC. These polymers were characterized by the mesogen content, 1.1, differential scanning calorimetry, and hot-stage coupled polarizing optical microscopy. The degree Of Substitution (DS) ranged from 0.27 to 1.11. Polymers HEC-LAB (DS = 1.11), HEC-LANB (DS = 0.80), HEC-LACin (DS = 0.76), and HEC-LAP (DS = 0.27) exhibited a mesophase on heating whereas HEC-LAB also showed a mesophase on cooling. The other polymers HEC-LAAC (DS = 0.89) and HEC-LAMeMS (DS = 0.36) did not reveal mesophase formation with either heating or cooling. It is observed that the formation of a mesophase is affected by the type of mesogen that is used rather than the mesogen content of the polymer. (c) 2006 Wiley Periodicals, Inc.</p>10ahydroxyethyl cellulose10alithocholic acid10athermotropic1 aShaikh, V., A. E.1 aMaldar, Noormahamad, N.1 aLonikar, Shrikant, Vitthal1 aRajan, C., R.1 aPonrathnam, S.  uhttps://library.ncl.res.in/content/thermotropic-behavior-lithocholic-acid-derivative-linked-hydroxyethyl-cellulose-1