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CO2 AS A POLYMER BUILDING BLOCK FUNDED PROJECTS 1.3 CO2 as a polymer building block BMBF Project FKZ 033RC0902 Project Coordinator: Prof. Berhard Rieger, Dr. Carsten Troll, Technische Universität München Project Partner: BASF, Siemens, Universität Hamburg 1.3.1 Introduction Carbon dioxide is a both a greenhouse gas and an inexpensive readily avail- able raw material. The collaborative project ‘CO2 as a polymer building block’ aims to transform CO2 into a usable molecular building block for synthesi- sing high-value polymers and thus contribute to solving the climate protec- tion and resource management challenges that are the focus of the German government’s High-Tech Strategy. The project concentrates solely on CO2 utilisation strategies that involve oligomeric and macromolecular chemis- try. In addition to assessing the technical feasibility of potential CO2 utili- sation routes, the project will also analyse them in terms of environmen- tal impact and economic viability. From a chemical perspective, the project will focus on two main areas of research: catalytic systems that facilitate the polymerisation reactions, and the properties of the polymer products. New approaches will lead to the development of more active catalysts that will, in turn, enable the more efficient copolymerisation of carbon dioxide with epoxides to form polycarbonates. The polymers themselves are based to about 50% on O2/CO2 and are environmentally compatible. Depending on the epoxides used, the product polymers are characterised by their biode- gradability, their excellent haptic properties, optical transparency and very interesting mechanical and thermal properties. Since Inoue and co-workers first discovered in 1969 that a mixture of ZnEt2 and H2O actively catalysed the alternating copolymerisation of propylene oxide (PO) and CO2 there Fig. 9: Copolymerization of carbon dioxide with epoxides to polycarbonates Polycarbonates 37PDF Image | Chemical Processes and Use of CO2
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