Abstract

The chapter summarizes results of the studies on the cationic, anionic, and pseudoanionic ring-opening dispersion polymerizations of cyclic acetals and esters. The requirements that must be fulfilled to yield products in the form of suspension of spherical particles with controlled diameters ranging from a few hundreds of nanometers to a few micrometers are discussed. The loci of initiation, mechanisms of particle nucleation, and growth are determined. Kinetics of dispersion ring-opening polymerization is analyzed and compared with similar ring-opening polymerization in solution. Ring-opening polymerization methods tailored for preparation of particles for medical applications are discussed.

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