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Shear induced textures of thermotropic acetoxypropylcellulose
Abstract : Acetoxypropylcellulose is a thermotropic cellulose derivative which is cholesteric from below room temperature up to 170 °C. Its textures during and after shear flow were studied by optical microscopy and small-angle light scattering (SALS) light scattering. The main features are similar to those occurring in hydroxypropylcellulose solutions, i.e., a polydomain texture evolving into a striated texture, as seen by optical microscopy. Elliptical or else four lobes with a streak are seen in the SALS patterns. Defects appearing as short dark lines not aligned with the flow direction are shown to be responsible for the existence of the four lobes of the SALS patterns. In addition these defects seem to be located where the band texture develops during relaxation
https://hal-mines-paristech.archives-ouvertes.fr/hal-00574914
Contributeur : Magalie Prudon <>
Soumis le : mercredi 9 mars 2011 - 10:12:08
Dernière modification le : mercredi 14 octobre 2020 - 04:13:23
Contributeur : Magalie Prudon <>
Soumis le : mercredi 9 mars 2011 - 10:12:08
Dernière modification le : mercredi 14 octobre 2020 - 04:13:23