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The polymeric chromophore, poly(4-butoxycarbonylmethylurethane), p-4BCMU, has a diacetylene backbone that displays a broad range of optical properties directly attributed to its conformation. The UV-Vis spectral properties of the polymer solution are dependent upon the backbone conjugation length, which describes the length over which the π-electrons are delocalised. The persistence length of the...
The chain segment orientation of the polyelectrolyte poly(styrene sulfonate), PSS, in glycerol solutions under shear have been studied using a novel Ultra Violet rheo-optic technique. The extinction coefficient of the polyelectrolyte in solution, ϵ, was measured using unpolarised light perpendicular to the direction of flow and is shown to decrease upon the application of shear. When the incident...
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