Molecular Weight of Montmorillonite from Optical Transmission Measurements1
- N. Lahav2 and
- A. Banin3
The weight average molecular weight of small Na-montmorillonite particles in aqueous suspension have been determined by means of optical density (OD) measurements. In the wavelength range of λ = 4000A to 6000A and in dilute clay suspension which obeys Beer-Lambert Law, the slope of the straight line of log (OD) vs. log λ is proportional to the major dimension of the particles. Assuming a disc geometry and the number of unit layers in a clay particle, and working with suspension with a slope near −4, the weight average molecular weight was found by using light scattering theory. The results agree reasonably with other data from the literature.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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