Synthesis and Characterization of Highly Refractive Polyimides Derived from Thiophene-Containing Aromatic Diamines and Aromatic Dianhydrides
作者:Namiko Fukuzaki、Tomoya Higashihara、Shinji Ando、Mitsuru Ueda
DOI:10.1021/ma902013y
日期:2010.2.23
Aromatic thiophene-containing diamines, 2,5-bis(4-aminophenylsulfanyl)thiophene (APST) and 2,5-bis2′-[5′-(4′′-aminophenyl)sulfanyl]thienyl}thiophene (APSTT), were synthesized and polymerized with a sulfur-containing dianhydride, 4,4′-[p-thiobis(phenylenesulfanyl)]diphthalic anhydride (3SDEA) and 4,4′-oxydiphthalic anhydride (ODPA), respectively, to afford four poly(amic acid)s (PAAs) with inherent
含芳族噻吩的二胺,2,5-双(4-氨基苯基硫烷基)噻吩(APST)和2,5-双2'-[5'-(4''-氨基苯基)硫烷基]噻吩基]噻吩(APSTT),合成并分别与含硫的二酐,4,4'-[对-硫代双(苯硫烷基)]二邻苯二甲酸酐(3SDEA)和4,4'-氧二邻苯二甲酸酐(ODPA)聚合,得到四种聚(酰胺酸) )(PAA)的固有粘度为0.41至1.68 dL / g。从PAA前体获得的柔韧的聚酰亚胺(PI)膜表现出良好的热,机械和光学性能。玻璃化温度(T g)的PI值范围为157-220°C(通过差示扫描量热法(DSC)确定)和160-216°C(通过动态力学分析(DMA)),具体取决于所用的二酐。10%的失重温度在354−456°C的范围内,显示出PI膜的相对较高的耐热性。PI膜在500 nm以上也显示出良好的光学透明性,这与使用随时间变化的密度泛函理论计算的吸收光谱非常吻合。在633nm处测得的平均折射率(n