SUSPENSION, DISPERSION, AND INTERFACIAL POLYCONDENSATION - A METHODOLOGICAL SURVEY

This review presents a general picture of suspension, dispersion, and interfacial polycondensation processes employed for the preparation of beaded resins, dry powders, and high solid dispersions. The polymer s ystems covered include polyamides, polyesters, polycarbonates, polyure thanes, and phenol-formaldehyde and urea-formaldehyde resins. Basic fe atures of heterogeneous polycondensation processes are outlined, and d ifferent mechanisms of particle formation in suspension, dispersion, a nd interfacial polycondensation are discussed. Effects of manufacturin g parameters such as feed ratio, droplet/particle stabilizer, and stir rer speed on product characteristics are also briefly covered.