Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Polypropylene carbonate (PPC), also called poly(propylene carbonate), is a polyalkylene carbonate plastic material, a copolymer of carbon dioxide and propylene oxide. It is made by reacting the monomers in presence of eg. a zinc glutarate catalyst. Polypropylene carbonate is soluble in polar solvents, eg. acetone, methyl ethyl ketone, ethyl acetate, dichloromethane and chlorinated hydrocarbons. It is insoluble in ethyl alcohol, ethylene glycols, water, and aliphatic hydrocarbons. Stable emulsions in water are available commercially only from Empower Materials Inc., Newark DE USA.