Determination of the degree of swelling and crosslinking of latex particles by analytical ultracentrifugation
Analytical ultracentrifugation has been used to characterize the solution properties of latices from emulsion polymerization. For that purpose, latices have to be taken over into a thermodynamically good solvent, and the distribution of sedimentation coefficients (s-values) has to be measured, consisting of high s-values due to swollen particles and low s-values from soluble macromolecules. From that, the portion of soluble macromolecules and swollen particles is available and from the s-value of the swollen particles their degree of swelling can be determined from fresh latex samples.
Key wordsLatex particles degree of swelling distribution of sedimentation coefficients analytical ultracentrifugation
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