This book explores ways to expand the uses of polyurethanes based on its chemical characteristics. The author discusses several applications but also focuses on biomaterials and environmental remediation. While providing an overview of polyurethane chemistry that includes tools for new products and state-of-the-art research on medical applications of polyurethanes, he introduces the reader to methods to control the environment with alternative polyurethane chemistries and gives design tools for product designers who can take advantage of the chemistry. The text suggests the use of PUR as an analytical/diagnostic system for testing toxicity without the use of animals.