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Vibrational Spectroscopy of Certain Polymaleic- and Polyacrylic-Based Mesomorphic Polymers

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Abstract:

The FT-IR/ATR technique has been employed in the investigation of the forces leading to the organization of a number of polymeric materials exhibiting thermotropic liquid crystalline character. Two types of compounds have been studied, i.e., one bearing the carboxylic polar group near the main chain and the other at the end of the side chain. Intermolecular and intramolecular hydrogen bonding between the carboxylic groups was found to lead to the formation of "facing" and "sideways" structures. Enhanced stability of these supramolecular structures was obtained by the presence of intramolecular hydrogen bonds between the amide groups, resulting in the formation of smectic phases. Furthermore, it has been found that the strengthening of hydrogen bonding between carboxylic groups is associated with a weakening of hydrogen bonds between the amide groups.

Keywords: ATR; FT-IR spectroscopy; Hydrogen bonding; Polymeric liquid crystals; Supramolecular structures

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702953965272

Affiliations: 1: NRC "Demokritos", 15310 Aghia Paraskevi, Attiki Athens, Greece 2: National Technical University of Athens, Zografou Campus, Zografou 15780, Greece

Publication date: September 1, 1995

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