The rheological behavior of a nematic polymethacrylate containing an azobenzene side group was investigated. The time-temperature superposition principle was found to hold over a large temperature range, as no discontinuities were detected at the isotropic-nematic transition temperature, despite the relatively high molar mass of the polymer. A direct proof of the unentangled behavior of the polymer is provided, which stems from a dynamic model able to predict the relaxation mechanisms by simply knowing the molar mass distribution of the polymer sample.

Unentangled Rheological Behavior of a Nematic Azobenzene Polymethacrylate

ANDREOZZI, LAURA;GIORDANO, MARCO;GALLI, GIANCARLO
2009

Abstract

The rheological behavior of a nematic polymethacrylate containing an azobenzene side group was investigated. The time-temperature superposition principle was found to hold over a large temperature range, as no discontinuities were detected at the isotropic-nematic transition temperature, despite the relatively high molar mass of the polymer. A direct proof of the unentangled behavior of the polymer is provided, which stems from a dynamic model able to predict the relaxation mechanisms by simply knowing the molar mass distribution of the polymer sample.
Andreozzi, Laura; Autiero, C; Faetti, M; Giordano, Marco; Zulli, F; Galli, Giancarlo
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/195974
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