【摘要】 通过合成一种含有脂环及酰胺结构的二酐单体（TCDA）,将其与多种不同的二胺聚合,制备了一系列透明聚酰亚胺薄膜,并对薄膜进行了性能测试与表征。结果表明:在二酐结构中同时引入反式环己烷及酰胺结构,使得合成的聚酰亚胺薄膜具有较优异的光学性能（T550>89%）、较低的热膨胀系数(CTE<17×10^-6K^-1)以及较高的玻璃化转变温度（T_g>320℃）,表明脂环结构的引入降低了电荷转移络合物的形成,提高了聚酰亚胺薄膜的透明性,而酰胺结构的引入降低了热膨胀系数。更多还原

【Abstract】 A novel dianhydride monomer containing alicyclic ring and amide group was synthesized and further polymerized with several diamine monomers to prepare a series of transparent polyimide films. The properties of the films were tested and characterized. The results show that the synthesized polyimide films have excellent optical properties（T550>89%）, low coefficient of thermal expansion(CTE<17×10^-6 K^-1), and higher glass transition temperature（Tg>320℃） because of introducing trans cyclohexane and amide into the structure of dianhydride at the same time. The introduction of alicyclic structure decreases the formation of charge transfer complex, which increases the transparency of the polyimide films. On the other hand, the introduction of amide structure decreases the coefficient of thermal expansion.更多还原