This book is an invaluable guide that summarizes the state-of-the-art knowledge on indispensable features and processing of shape memory polymers and nanocomposite. It provides its readers with different routes and possibilities to alter the physico-chemical features of polymer nanocomposites to tune them for specific applications. Different functional response to stimuli of polymer-based nanocomposites and their use as foam materials, radiation shielding, sensors, actuators, energy devices, and in biomedical devices is explored. The book gives a comprehensive account of the past, present and future of smart nanomaterials from polyurethanes, polystyrenes, epoxides, and polyesters.