Flow properties of smectic liquid crystals
Liquid crystals or mesomorphic systems are the subject of interest from the viewpoint of rheology. Since the discovery by Lehmann (1) in the end of the last century, pretty many investigations concerning flow properties of liquid crystals, especially viscosity studies on these substances have been carried out (2). However, relatively few data on flow properties of smectic liquid crystals, i.e. soap-like substances, in their molten states have been reported. In the present paper the flow properties of some ammonium salts of higher normal carboxylic acids in their mesomorphic states will be described and discussed.
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