Dynamo-optical properties of poly(naphthylene oxadiazole)s in sulfuric acid
- Flow birefringence induced in dilute solutions of poly[(1,4-naphthylene)-2,5-diyl-1,3,4-oxadiazole] and poly[2,6-naphthylene)-2,5-diyl-1,3,4-oxadiazole] in conc. sulphuric acid has been investigated. The shear optical coefficient was found for these polymers to be approximately double the value of that obtained in the same solvent for poly[(para-phenylene) -2,5-diyl-1,3,4-oxadiazole]. Rigid-chain behaviour of the polymers was characterized by hydrodynamic and dynamo-optical parameters evaluated with application of the worm-like chain model and the "method of similar structures". Change in optical anisotropy of a chain unit induced by incorporation of naphthylene groups into the main chain has been evaluated.
Author details: | Peter N. Lavrenko, Irina A. Strelina, Burkhard SchulzORCiDGND |
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Publication type: | Article |
Language: | English |
Year of first publication: | 1997 |
Publication year: | 1997 |
Release date: | 2017/03/24 |
Source: | European polymer journal. - 33 (1997), 6, S. 805 - 809 |
Organizational units: | Zentrale und wissenschaftliche Einrichtungen / Interdisziplinäres Zentrum für Dünne Organische und Biochemische Schichten |