A Comparison of Optico-Optical Scattering and Birefringence Measurements on Wyoming Sodium Bentonite Suspensions
A new light scattering technique for investigating anisotropy is described. Wyoming sodium bentonite particles were suspended in water and were oriented by the electric field of a high energy infrared laser pulse while a 488 nm CW argon laser beam was used to monitor changes in particle orientation by measuring HV or VV intensities at a 90° scattering angle. HV and VV changes were observed to be in opposite directions. Laser induced birefringence experiments were also made and relaxation times were obtained. The results were used to probe polydispersity and time-dependent phenomena.
KeywordsNeutral Density Filter Particle Orientation Bentonite Sample Birefringence Measurement Bentonite Suspension
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