Latex Particle Size Determination Using Diffraction Peaks Obtained with the Point Focusing X-Ray Monochromator
Abstract
We describe the results of experiments we have made, using the point focusing monochromator as the primary tool, to determine the particle size of latex spheres. The suitability of the instrument for this particular study is described and the experimental data obtained are tabulated, these data coming from our experiments with three physically distinct samples of Dow latex. We attempt to make a critical interpretation of the data by considering separately several possible space arrangements which the latex spheres might assume when the water, which is initially the suspending fluid, is evaporated. Corrections for the finite size and shape of the "point" focus are described. The absence of a significant difference in the mean particle sizes of the three samples considered is established. The data from all three samples is combined to yield a mean particle diameter under an external pressure of one atmosphere of 2687.5A with a statistical standard deviation of 1.2A and a fixed (systematic) error estimated to be not more than ±7A.
Additional Information
© 1952 The American Institute of Physics. Received February 18, 1952. This work was performed and financed under the joint sponsorship of the ONR and AEC by contract with the California Institute of Technology. We take this opportunity to express our gratitude to the sponsors of this research (the ONR and the AEC) for their generous support and our deep appreciation to Professor Linus Pauling of this Institute, who recommended its support and encouragement to our sponsors when its success was still uncertain. We are also happy to have this opportunity to thank Professor R. B. Corey of the C.I.T. Chemistry Department and Professors J. Weigle and G. W. Beadle of the C.l.T. Biology Department for most helpful advice and discussions regarding future problems suitable for the new instrument.Attached Files
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Additional details
- Eprint ID
- 46413
- Resolver ID
- CaltechAUTHORS:20140621-120410463
- Office of Naval Research (ONR)
- Atomic Energy Commission
- Created
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2014-06-23Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field