Offering improved barrier properties, fire resistance, and strength, polymer nanocomposites are increasingly desirable as coating, structural, and packaging materials in a wide range of automobile, civil, and electrical engineering applications. Polymer Nanocomposites offers a comprehensive review of the main types of polymer nanocomposites and their properties. Part I reviews the range of layered silicates and discusses such properties as flammability, thermal stability, barrier properties, wear resistant and biodegradability. Part II considers nanotubes, nanoparticles, and inorganic-organic hybrid systems, and analysis elasticity and strength as well as magnetic and light-emitting properties.