The lecture deals with current challenges in the polymer chemistry and plastics industry with the focus on circularity, additive manufacturing, and digitalization/modeling. The concept of circular economy will be introduced using plastics as an example. Mechanical and chemical recycling, life cycle assessment and waste management in an industrial context will be explained. Additive manufacturing technologies and equipment will be introduced, and 3D-printed equipment at laboratory and industrial scale, as well as application examples for reactors and reactions, will be covered. In addition, digitization and modeling will be introduced as an important component of polymerization technology.