This book includes three main sections. The First Chapter (Introduction); is concerned with the concepts of with some types of polymers like: - thermosetting polymers, such as: 1- phenolic resins [novolac phenol formaldehyde and resole phenol formaldehyde], their properties, modifications and applications, 2- epoxy resins, their history, synthesis of different types (epoxy resin based on bisphenol A, epoxy novolac resins, halogenated epoxy, hydrogenated bisphenol A, and epoxy resins from per acids). Curing and cross-linking reactions of epoxy resins, types of curing agents [alkaline curing...