This book is a collection of technical papers focusing on the preparation, characterization and application of polymer-nanocomposites. The various chapters in the book are written by prominent researchers from industry, academia, and government/private research laboratories across the globe. Different techniques adopted for the preparation of nano composites, their methods of characterization and their applications are discussed. The main objective of this book is to summarize in a fairly comprehensive manner many of the recent technical accomplishments in the area of polymer nanocomposites. The book is intended to serve as a one stop reference resource for important research accomplishments in the area of polymer nanocomposites.