The book gives a state-of-art overview on all aspects of micro- and nanomechanics of polymers, polymeric blends, and composites. Major issues tackled include experimental techniques to study the mechanical performance of polymer systems, especially with respect to molecular, supermolecular and filler architectures on suitable model materials; prediction methods for the mechanical performance (short and long term properties); modeling tools and approaches. All these aspects are highlighted for polymeric systems of both academic and practical relevance.