This book summarizes many of the recent research accomplishments in the area of polyvinylchloride (PVC)-based blends and their preparation, characterization and applications. Various sub-topics are addressed, such as the state-of-the-art of PVC based blends, new challenges and opportunities, emphasis being given to the types and sizes of components/fillers and optimum compositions of PVC blends, their processing and structure-properties relationships, modification/compatibilization methods, and possible applications. PVC/thermoplastic based nano, micro and macro blends, PVC membranes, bio-based plasticizers and PVC blends with components from renewable resources are reported. The various chapters in this book are contributed by prominent researchers from industry, academia and government/private research laboratories across the globe. It covers an up-to-date record on the major findings and observations in the field of PVC-based blends.