Poly(Propylene Carbonate) from Carbon Dioxide: Challenges for Large-Scale Application The state of the art in the preparation of poly(propylene carbonate) from propylene oxide and carbon dioxide is summarized. Poly(propylene carbonate) is a kinetic product with a high enthalpy of formation. After decades of continuous development catalysts are now available that would allow an economically viable preparation of the polymer. A continuous process was patented recently. The remaining challenges for an economically successful large-scale application are to establish a simple process and to adjust the material property profile to requirements of existing markets.