可生物降解的CO_2共聚物的合成、性能及改性研究进展

Progress and Application of Biodegradable Plastic Derived from Copolymerization of Carbon Dioxide with Epoxides

CO2与环氧化物共聚生成脂肪族聚碳酸酯,不仅缓解了石油资源短缺的问题,而且生成的塑料可降解,能避免二次污染问题。对CO2与环氧化物共聚的催化体系、反应机理及合成工艺等方面进行了综述;CO2与环氧丙烷共聚得到的聚甲基乙撑碳酸酯(PPC)为无定形聚合物,玻璃化转变温度在40℃左右,因此受其本身力学性能和热性能的影响,在单独作为一种结构材料使用时受到较大限制,必须对其进行物理或化学改性。还讨论了PPC的化学结构、性能和应用等方面的研究成果。

The synthesis and properties of biodegradable plastics derived from carbon dioxide with epoxides are reviewed in this article. The greenhouse gas carbon dioxide can be used as a monomer for new polymer synthesis. The synthesized alternating copolymer is a typical amorphous polycarbonate with a glass transition temperature of about 40 ~C. The various catalyst systems, copolymerization conditions and related mechanism are discussed in detailed in view of the particularly copolymerization of carbon dioxide and propylene oxide. Because of its poor mechanical properties and thermal stability, many improvement methods have been used to enhance these related properties, either by blending or by chemical modification. Furthermore, the chemical structure of this new copolymer is explained and the relationship between the structure and properties is correlated accordingly. Finally, the discussion of the potential applications of this new copolymer is provided.