Polymers are an indispensable part of life. Natural polymers include DNA, proteins, starch, cellulose and wood, and synthetic polymers include plastics. Explore the basic principles of polymer structure and function. Digital PDF collection of Volume 21 of the best-selling Flinn ChemTopic™ Labs series of lab manuals! Contains experiments and demonstrations that are guaranteed to help you teach chemistry. Made with the guidance of the best chemistry teachers in America.