The present book deals with the latest technology relating to plastics and polymers. Certain polymers are capable of showing extraordinary high electronic conductivities (popularly called Shirakawa conducting polymers) while other polymers - like polyethylene oxide complexed with various dopant salts show high ionic conductivities making them suitable for several applications like solid state batteries, Smart windows and electrolytes for PEC solar cells. This book is designed for researchers interested in new and novel applications of polymeric materials. The use of ion conducting polymers in all solid state batteries receives special attention. New experimental techniques or improved sensitivities and detection capabilities of old and established techniques like Raman spectroscopy and infrared absorption are also presented to explain the intricacies of these special properties observed in polymeric materials. The use of equipment and recent methods like XPS and NMR and their use in the understanding are also discussed.