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Polypropylene carbonate : ウィキペディア英語版 | Polypropylene carbonate
}} Polypropylene carbonate (PPC), a copolymer of carbon dioxide and propylene oxide, is a thermoplastic material. Catalysts like zinc glutarate are used in polymerization. == Properties == Polypropylene carbonate is soluble in polar solvents like lower ketones, ethyl acetate, dichloromethane and chlorinated hydrocarbons and insoluble in solvents like alcohols, water, and aliphatic hydrocarbons. It also forms stable emulsions in water. PPC allows the diffusion of gases like oxygen through it. Having a glass temperature (Tg) between 25 to 45 °C, PPC binders are amorphous. The glass temperature of PPC is slightly greater than polyethylene carbonate (PEC). Its refractive index is 1.46 while its dielectric constant is 3.〔(【引用サイトリンク】 title=Material Properties of Poly(Propylene Carbonates) )〕
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