Rheological studies on sterically stabilized dispersions of uniform colloidal spheres: I. Sample Preparation

A series of model colloidal dispersions was prepared in which uniform poly(methylmethacrylate) spheres of four different particle sizes were dispersed in heptane and in three different silicone oils. Polymerization was carried out in hexane, using as stabilizers well-characterized tri-block copolyme...

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Published in:Journal of colloid and interface science 1986, Vol.113 (1), p.94-100
Main Authors: Chop, Gerald N, Krieger, Irvin M
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
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Krieger, Irvin M
description A series of model colloidal dispersions was prepared in which uniform poly(methylmethacrylate) spheres of four different particle sizes were dispersed in heptane and in three different silicone oils. Polymerization was carried out in hexane, using as stabilizers well-characterized tri-block copolymers in which the end blocks were poly(dimethylsiloxane) and the central block was polystyrene. The dispersions were cleaned by successive centrifugations and decantations before redispersal in the silicone oils. Particle sizes were measured by both electron microscopy and photon correlation spectroscopy. Thickness of the adsorbed layer was determined from both intrinsic viscometry and as the difference between the hydrodynamic radius from photon correlation spectroscopy and the particle radius from electron microscopy.
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source Backfile Package - Materials Science [YMS]; Backfile Package - Chemical Engineering (Legacy) [YCC]
subjects Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
title Rheological studies on sterically stabilized dispersions of uniform colloidal spheres: I. Sample Preparation
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