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Silicate Clay Platelet Dispersion in a Polymer Matrix

Published online by Cambridge University Press:  10 February 2011

C. D. Muzny,
B. D. Butler,
H. J. M. Hanley,
F. Tsvetkovt and
D. G. PeiffeR
C. D. Muzny
Affiliation:
University of Colorado, Dept. of Physics, Boulder, CO
B. D. Butler
Affiliation:
Physical and Chemical Properties Division, NIST, Boulder, CO
H. J. M. Hanley
Affiliation:
Physical and Chemical Properties Division, NIST, Boulder, CO
F. Tsvetkovt
Affiliation:
Solar Dynamics, Ashod, Israel
D. G. PeiffeR
Affiliation:
Exxon Research and Engineering, Annandale, NJ
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Abstract

The use of dynamic light scattering to monitor the dispersion of clay platelets in a polymer matrix is described. The dispersed clay/polymer composite was prepared by joining surfactant monomers to synthetic hectorite clay platelets by a cationic exchange reaction and subsequently polymerizing with acrylamide. Dispersion of the organically modified clay in aqueous solution was facilitated by preparing a clay surfactant precursor suspension with a surfactant concentration significantly above the clay cation exchange capacity. At lower surfactant concentrations the clay does not disperse but instead forms large polydisperse aggregates unsuitable for making homogeneous composites. The presence of these aggregates could not be found in an x-ray powder diffraction scan but were clearly detected using dynamic light scattering.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 435: Symposium V – Better Ceramics Through Chemistry VII , 1996, 85
Copyright
Copyright © Materials Research Society 1996

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