Book excerpt: Polyurethane Polymers: Composites and Nanocomposites concentrates on the composites and nanocomposites of polyurethane based materials. Polyurethane composites are a very important class of materials widely used in the biomedical and industrial field that offer numerous potential applications in many areas. This book discusses current research and identifies future research needs in the area. - Provides an elaborate coverage of the chemistry of polyurethane, its synthesis, and properties - Includes available characterization techniques - Relates types of polyurethanes to their potential properties - Discusses composites, nanocomposites options, and PU recycling