ABSTRACT
Organic polymers are prepared under ultrasound exposure. These are polymerized by a variety of mechanisms, but the most widely used method is initiation by radicals undergoing chain growth or addition reactions. A sonochemical synthesis of polyaniline nanotubes containing Fe3O4 nanoparticles has been carried out by Lu et al and Qiu et al. prepared polypyrrole /Fe3O4 magnetic nanocomposites using ultrasonic irradiation. The sonochemical synthesis of hybrid nanocomposites titania:polypyrrole wasreported by Arenas et al. Barkade et al. synthesized polythiophene-coated SnO2 nano-hybrid particles using an ultrasound assisted-in situ oxidative polymerization of thiophene monomers. Patra et al. studied ultrasound-assisted emulsifier-free emulsion polymerization and synthesized Polymethyl methacrylate/clay nanocomposites. The ultrasound treatment enhanced initial kinetics with high degree of polymerization and it is considered demonstrated to be an effective green approach to intensify the polyesterification reaction. The polymer chain degradation in solution was one of the first reported effects of high-intensity ultrasound on polymers.
