Polymer Nanocomposites for Electromagnetic Interference and Nuclear Shielding: Fundamentals and Applications provides a comprehensive, up-to-date account of the latest developments in this field, targeting both the fundamental mechanisms and industrial applications. It positions polymeric nanocomposites as superior alternatives to traditional metallic and ceramic shielding materials due to their light weight, flexibility, processability, and eco-friendly properties. The book is timely as advances in nanotechnology and the increasing demand for advanced shielding materials in aerospace, defense, electronics, and energy sectors drive rapid innovation and pose new challenges for researchers. Key themes include the basic phenomena of EMI and nuclear shielding, design and fabrication of polymer-based shielding materials, the role of nanofillers (carbonaceous, inorganic, MOFs, COFs), impact of microstructure and processing (films, fibers, foams, 3D printing), and application-driven case studies. Environmental considerations and recyclability are also discussed. The content is structured into ten chapters, starting with theoretical fundamentals, then systematically moving through material classes, fabrication methods, functional architectures, industrial applications, green materials, and future commercial prospects. The book fills a critical gap by providing a systematic, application-based resource and includes standardized methods, performance metrics, and real-world examples. - Comprehensive coverage of both EMI and nuclear shielding, including fundamentals and applications - Detailed treatment of polymers, nanofillers, and hybrid composites - In-depth analysis of processing effects (films, fibers, foams, 3D printing) - Inclusion of green materials and recyclability aspects - Case studies illustrating industrial applications - Systematic integration of theory and practice