Microstructure and dynamics of wormlike micellar solutions formed by mixing cationic and anionic surfactants

Article Abstract:

Small-angle neutron scattering and rheology are used to probe the wormlike miselles formed in mixtures of a cationic and an anionic surfactant. The findings are discussed in terms of a maximum in the linear micellar contour length L at phis(sub max) and suggest that the hydrodynamic and electrostatic correlation lengths reach an optimal ratio at this point.

Surface active agents, Surface Active Agent Manufacturing, Anionic Surfactants, Electric properties, Rheology, Microstructure, Microstructures, Neutron scattering, Structure

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The Role of laser heating in the intrinsic optical bistability of Yb(super 3 plus) doped bromide lattices

Article Abstract:

The properties of the unusual intrinsic optical bistability observed in YB(super 3+) doped Cs(sub 3)Lu(sub 2) Br(sub 9) and CsCdBr(sub 3) host materials are examined using absorption and luminescence spectroscopies. The conclusion states that the laser heating may contribute significantly to the shape or slope of an excitation power dependence curve.

Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Cesium, Ytterbium & Compounds, Optical properties, Luminescence, Bromides, Ytterbium

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Polyelectrolyte titration: theory and experiment

Article Abstract:

Titration of methacrylic acid/ethyl acrylate copolymers is studied experimentally and theoretically. Polymers can be made water-soluble by making them compatible with the strong polar environment of the aqueous media by introducing either charges or strong dipoles on the chains.

All Other Basic Organic Chemical Manufacturing, All Other Miscellaneous Chemical Product and Preparation Manufacturing, Industrial Organic Chemicals, Chemical preparations, not elsewhere classified, Polyelectrolytes, Methacrylic Acid, Volumetric analysis, Copolymers

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