Arshady R
Department of Chemistry, Kashan College of Science, Iran.
J Microencapsul. 1989 Jan-Mar;6(1):1-12. doi: 10.3109/02652048909019897.
Particle-forming polycondensation techniques can be divided into two main categories, namely normal polycondensation and interfacial polycondensation. Various normal polycondensation procedures employed for the preparation of nano- and microspheres are covered by this review, and are described under suspension polycondensation, dispersion polycondensation and precipitation polycondensation. Among these, suspension polycondensation procedures are generally applicable for the preparation of both nano- and microspheres. They are employed for the production of industrially important polycondensates such as phenolics, polyesters and polyurethanes, as well as for novel polymeric materials such as polycyclodextrins, mercury-binding polymercaptals, and polyurea microcapsules. Dispersion polycondensation leads to the formation of monodisperse nanoparticles, but it is not widely employed. Precipitation polycondensation produces non-spherical and polydisperse particles, and it is useful only if low molecular weights of the polymer and polydispersity of the particles do not adversely affect the intended application of the product.
形成颗粒的缩聚技术主要可分为两大类，即常规缩聚和界面缩聚。本综述涵盖了用于制备纳米球和微球的各种常规缩聚方法，并在悬浮缩聚、分散缩聚和沉淀缩聚下进行了描述。其中，悬浮缩聚方法通常适用于制备纳米球和微球。它们被用于生产工业上重要的缩聚物，如酚醛树脂、聚酯和聚氨酯，以及新型高分子材料，如聚环糊精、汞结合聚合物硫醇和聚脲微胶囊。分散缩聚会导致形成单分散纳米颗粒，但并未得到广泛应用。沉淀缩聚产生非球形且多分散的颗粒，只有当聚合物的低分子量和颗粒的多分散性不会对产品的预期应用产生不利影响时，它才有用。
