Materials science encompasses four classes of materials, the study of each of which may be considered a separate field: metals, ceramics, polymers and composites. This volume gathers important research from around the globe in this dynamic field including research on the outstanding contributions in the area of polymeric micro and nanoparticles as drug delivery systems; strategies to modify the inorganic clays and to make them compatible with polymeric matrices and the effect of each one; present problems of ceramic lubricating materials, and the design principle of these materials; the study of Pincina alginite and its applications; the methods of determining the composition of polarons with different mobility and their main magnetic, relaxation and dynamics parameters from effective EPR spectra and the development of glass fibre reinforced polyester composites.