scholarly journals Supramolecular Liquid-Crystalline Polyamides. Polymeric Complexes Formed through Hydrogen Bonding between Benzoic Acid Derivatives and a 2,6-Diaminopyridine Moiety in the Polymer Backbone.

1999 ◽  
Vol 55 (6) ◽  
pp. 274-278 ◽  
Author(s):  
Osamu Ihata ◽  
Takashi Kato
Keyword(s):  
Hydrogen Bonding ◽  
Benzoic Acid ◽  
Liquid Crystalline ◽  
Polymer Backbone ◽  
Benzoic Acid Derivatives ◽  
Polymeric Complexes

The Effect of Hydrogen Bonding on the Mesomorphic Properties for Side Chain Type Liquid Crystalline Polyurethanes

1996 ◽  
Vol 425 ◽  
Author(s):  
T. Mihara ◽  
N. Koide
Keyword(s):  
Hydrogen Bonding ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Flexible Chain ◽  
Remarkable Change ◽  
Polymer Backbone ◽  
Phase Transition Temperatures ◽  
Ft Ir ◽  
Mesomorphic Properties ◽  
Chain Type

AbstractMesomorphic properties and temperature dependence of the hydrogen bonding between urethane bonds (H-bonding) for side chain type liquid crystalline polyurethane(SLCPU)s were studied by thermally controlled FT-IR spectroscopy. A remarkable change in the strength of H-bonding for SLCPUs with a flexible chain in the polymer backbone(flexible SLCPUs) was displayed near the phase transition temperatures, while small changes in the strength of H-bonding for SLCPUs with a rigid moiety in the polymer backbone(rigid SLCPUs) was influenced by a mesogenic group in the side chain and the flexible chain length in the polymer backbone. Furthermore, in order to study the influence of H-bonding in rigid SLCPUs, polyurethane derivatives with methyl group were synthesized replacing hydrogen in urethane bonds. No mesomorphic properties for polyurethane derivatives obtained were exhibited. It was concluded that H-bonding played an important role to exhibit mesomorphic properties of rigid SLCPUs.

Liquid crystalline behaviour of benzoic acid derivatives containing alkoxyazobenzene

2007 ◽  
Vol 34 (6) ◽  
pp. 659-665 ◽  
Author(s):  
Binglian Bai ◽  
Haitao Wang ◽  
Hong Xin ◽  
Beihong Long ◽  
Min Li
Keyword(s):  
Benzoic Acid ◽  
Liquid Crystalline ◽  
Benzoic Acid Derivatives
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