Over decades, nanotechnology thrived through science and technology. For polymer nanocomposites, radical changes in many properties were seen. If uccessfully exploited, it will achieve the critical requirement of multi-functional properties from single material. However, previous explanations are mostly plausible or inconclusive. Besides, results are mixed specially on toughness. Thence, it is in this book that a systematic investigation is provided for the understanding of structure-deformation-property relationships. Two aspects, fracture toughness and fatigue resistance, are...