The thermodynamic equations describing the equilibrium swelling of polymer, oligomer and polymer/oligomer particles are reviewed. The phenomenon of phase separation during swelling is discussed. Methods for preparation of monodisperse composite particles are described and the particle composition is discussed in terms of various relevant parameters. It is shown that crosslinked polymer particles may swell by a core and shell mechan sm which may increase the rate of swelling in the second step as compared to non-crosslinked part cles. Biochemical and biomedical applications of different composite particles are described.
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Ugelstad et al. (1985) studied this question.
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