Thermotropic liquid crystalline polymers smectic ?C? phase in a liquid side-chain poly ? chloroacrylate

1985 ◽  
Vol 14 (6) ◽  
Author(s):  
G. Decobert ◽  
F. Soyer ◽  
J.C. Dubois ◽  
P. Davidson
Keyword(s):  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers ◽  
Smectic C ◽  
Thermotropic Liquid Crystalline Polymers

New Architectures for Side Chain Liquid Crystalline Polymers with Chiral Smectic C Mesophases

1994 ◽  
Vol 31 (11) ◽  
pp. 1591-1607 ◽  
Author(s):  
Coleen Pugh ◽  
Stephen Arehart ◽  
Hui Liu ◽  
Ramasubramanian Narayanan
Keyword(s):  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers ◽  
Smectic C

Synthesis of Ferroelectric Liquid Crystalline Polymers by Ring Opening Polymerization

1996 ◽  
Vol 425 ◽  
Author(s):  
C. S. Hsu ◽  
C. J. Lee
Keyword(s):  
Ring Opening ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Ring Opening Polymerization ◽  
Side Chain ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Crystalline Polymers ◽  
Smectic A ◽  
Smectic C

AbstractThe synthesis of two series of side-chain liquid crystalline polyoxetanes and polyoxiranes containing 4-alkanyloxybiphenyl-4′ -yl (2S,3S)-2-chloro-3-methylvalerate side groups is presented. Differential scanning calorimetry, polarizing optical microscopy, and X-ray diffractometry reveal smectic mesomorphism for all obtained polymers. Most of the prepared polyoxetanes present smectic A and chiral smectic C phases. The polyoxetane containing tweleve methylene units in the spacer is the only one showing two enantiotropic smectic A and B phases. All of the obtained polyoxiranes display two enantiotropic smectic A and B phases. Although the polyoxetane and polyoxirane backbones are more flexible than the polymethacrylate backbone, side-chain crystallization do not occur in any of the synthesized polymers.

A New Series of Two-Ring-Based Side Chain Liquid Crystalline Polymers: Synthesis and Mesophase Characterization

2013 ◽  
Vol 66 (6) ◽  
pp. 667 ◽  
Author(s):  
Goddeti Siva Mohan Reddy ◽  
Tanneru Narasimhaswamy ◽  
Jarugala Jayaramudu ◽  
Emmanuel Rotimi Sadiku ◽  
Konduru Mohana Raju ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Variable Temperature ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Scanning Calorimetry ◽  
Crystalline Polymers ◽  
Molecular Weights ◽  
Smectic C ◽  
Phenyl Rings ◽  
Alkoxy Groups

A new series of side chain liquid crystalline polymers containing a core, a butamethylenoxy spacer, ester groups, and terminal alkoxy groups were synthesised and their structures were confirmed. The core was constructed with two phenyl rings and an ester linking unit. All the polymers were characterised by hot-stage polarising optical microscopy, differential scanning calorimetry, variable temperature X-ray diffraction, thermogravimetric analysis, and gel permeation chromato-graphy. The polymers were found to be liquid crystalline. The nematic and smectic A (SA) phases were observed for the homologues with short-terminal chains (C2 and C6), whereas the homologues with longer chains (C8 to C12) exhibited a smectic C phase. The thermal stability of the polymers was found to be in the range of 293 to 326°C and the molecular weights of the polymers were found to vary from 6 × 103 to 1.3 × 104.

Gas sorption in thermotropic liquid-crystalline polymers

1990 ◽  
Vol 9 (11) ◽  
pp. 1280-1283 ◽  
Author(s):  
C. Carfagna ◽  
E. Amendola ◽  
G. Mensitieri ◽  
L. Nicolais
Keyword(s):  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Gas Sorption ◽  
Crystalline Polymers ◽  
Thermotropic Liquid Crystalline Polymers
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