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A small-angle neutron scattering investigation of rod-like micelles aligned by shear flow

1987; Royal Society of Chemistry; Volume: 83; Issue: 9 Linguagem: Inglês

10.1039/f19878302773

2050-5655

Phillip G. Cummins, Edwin J. Staples, John B. Hayter, J. Penfold,

Material Dynamics and Properties

A wide range of rod-like micellar solutions, aligned by couette shear flow, have been investigated by small-angle neutron scattering, SANS. The data are consistent with a previously reported theoretical interpretation, and rod dimensions are obtained from the theoretical fits. Scattering effects attributed to rod flexibility are presented and interpreted in terms of a simple model. The shear gradient dependence of the rotational diffusion coefficient due to entanglement of the rods is observed. In the limit of high shear the dilute rotational diffusion coefficient is recovered.