Development of High-tenacity and Thermally Stable Plastics byPolymerization of Plant-derived Aromatic Hydroxy Acids

以阿魏酸和咖啡酸为原料制备芳香聚酯，这两种物质均可从米糠和萃取咖啡豆等农业废弃物中获得。聚咖啡酸在110℃左右发生玻璃化转变，但在320℃以下不发生热降解。阿魏酸和乙醇酸共聚酯自发形成热致液晶相，而聚咖啡酸在玻璃化温度以上剪切作用下形成液晶相。

Development of aromatic polyesters from ferulic and caffeic acids, both of which can be obtained from agricultural wastes such as rice bran and extracted coffee beans, was performed. Poly(caffeic acid) showed glass transition at about 110 °C but was not thermally degraded below 320 °C. While copolyester of ferulic acid and glycolic acid spontaneously showed thermotropic liquid crystalline phase, poly(caffeic acid) formed liquid crystalline phase under shear above the glass transition temperatures.