Polypropylene is extensively used in packaging, textiles, equipment manufacturing and other areas. This book is a compilation of researches based on polypropylene, accomplished by experts around the globe over five decades. It demonstrates the various developmental stages that polypropylene has undergone. This book also consists of some current polypropylene theories. The book encompasses the various applications of polypropylene in diverse scientific fields. It intends to provide concise and well-compiled information related to polypropylene to its readers.