With an industrial motivation to commercialize polymer nanocomposites (PNCs) products, development of new nanocomposites with improved properties is still a great scientific thrust. PNCs represent a radical alternative to conventional filled polymers or polymer blends – a staple of the modern plastics industry. In order to make much stiffer, light weight and high performance material products, polymer nanocomposites play an emerging role in the material innovation. The present book is based on doctoral research primarily focused on use of nanoscopic fillers i.e layered double hydroxides (LDHs) which render the polymer composites to exhibit interesting structure-property relationships and promising application perspectives. The resulting nanohybrids have quite a high potential to form innovative materials and replace the conventional plastics in many automotive and packaging applications.