Abstract
The chapter summarizes the recent developments in catalyst synthesis, polymer analytics, and material properties of polycarbonates produced from carbon dioxide and epoxides. The physical behavior of the two most important and well-researched polycarbonates poly(propylene carbonate) (PPC) and poly(cyclohexene carbonate) (PCHC) do not meet the desired characteristics of structure polymers, yet. Terpolymerization, blending, end-capping, and increasing the molecular weight are just a few examples which are more closely covered in this chapter and could be methods for adjusting PPC and PCHC properties. NMR analytics are one of the major analytical tools for the characterization of the polymer microstructure and are also included in this chapter. Today, the focus for homogeneous catalysts is shifting toward sustainable and cheap metals, e.g., magnesium and zinc. Studies with heterogeneous and homogeneous structures indicate a strong dependence of the activity on the distance between the metal sites. Bimetallic systems try to exploit this correlation. Kinetic studies supported by DFT calculations have been performed, which support the hypothesis and show up new ways toward even higher activities in the copolymerization of carbon dioxide and epoxides.
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