Polymer scientists study polymers, which are large molecules made up of repeating structural units called monomers. These materials can be natural, like rubber and cellulose, or synthetic, such as plastic and nylon. Their work involves understanding how the properties of polymers change based on their structure and composition, which is essential for developing new materials. In addition to research, polymer scientists often collaborate with engineers and manufacturers to create products that meet specific needs. They may work in various industries, including medicine, electronics, and packaging, where their expertise helps improve the performance and sustainability of materials used in everyday items.