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聚碳酸亚丙酯(PPC)是由二氧化碳和环氧丙烷合成的一类新型高分子材料,具有透明性、生物降解性和生物相容性等特点,可以用作包装材料、气体阻隔材料、生物医用材料等方面。但是,由于PPC的热稳定性较差,在150~180℃的范围内就会出现降解,这样使其应用受到限制。另外,由于在工业生产中大部分高分子材料的加工温度高于150℃。在这样的加工条件下,PPC会发生明显的降解,从而导致共混效果差。因此,关于提高热稳定性的研究一直是PPC改性的研究重点。综述了聚碳酸亚丙酯的热降解机理及其影响因素,并对目前提高PPC热稳定性的方法及研究成果进行了简要介绍。
Poly propylene carbonate (PPC) is a new type of polymer synthesized from carbon dioxide and propylene oxide. It has the characteristics of transparency, biodegradability and biocompatibility. It can be used as packing material, gas barrier material, Medical materials and so on. However, due to the poor thermal stability of PPC, degradation occurs in the range of 150 to 180 ° C, which limits its use. In addition, the processing temperature of most polymer materials in industrial production is higher than 150 ° C. Under these processing conditions, significant degradation of PPC occurs, resulting in poor blending. Therefore, the study on improving the thermal stability has been the focus of PPC modification. The mechanism of thermal degradation of poly (propylene carbonate) and its influencing factors were reviewed. The current methods and results of improving the thermal stability of PPC were briefly introduced.