Shear induced textures of thermotropic acetoxypropylcellulose

J. B. Riti, M. T. Cidade, M. H. Godinho, A. F. Martins, P. Navard

Research output: Contribution to journalArticle

37 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1247-1260
Number of pages14
JournalJournal Of Rheology
Volume41
Issue number6
DOIs
Publication statusPublished - 1 Jan 1997

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