The aim of this book is to provide a comprehensive introduction to the field of polyethylene in all its aspects as it applies to production, properties, and applications. Specifically, it correlates molecular structure with morphological features and thus with properties and end-use applications. Starting from a molecular description of the principal variants of polyethylene, it constructs a unified picture of polyethylene’s melt structure and solid-state morphology and explains how this relates to processing variables and end-use applications.