Hydrolytic Stability and High T-g of Polyimides Derived from the Novel 4,9-Bis[4-(3,4-dicarboxyphenoxy)phenyl]-diamantane Dianhydride

作者：Chern Yaw Terng^*; Wang Jane Jen

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2009, 47(6): 1673-1684.

DOI：10.1002/pola.23265

• diamantane
• dielectric properties
• heteroatom-containing polymers
• hydrolytically stable polymer
• low K
• low moisture absorption
• polyimides

This work reports the synthesis and characterization of diamantane-based polyimides obtained from 4,9-bis[4(3,4-dicarboxyphenoxy)phenyl]diamantane dianhydride and various aromatic diamines. Interestingly, the diamantane-based polyimides were very stable to hydrolysis. This novel polyimide exhibits a low dielectric constant (2.65-2.77), low moisture absorption (<0.67%), good solubility, high T, and unusually high thermal stability. Dynamic mechanical analysis (DMA) reveals that the diamantane-based polyimides have high T-g ranging from 281 to 379 degrees C. The high-temperature beta(1) subglass transition around 285 degrees C was observed in polyimide 6a derived from 2,2'-bis(trifluoromethyl)benzidine. This class of novel diamantane-based polyimide is very promising for electronic applications, because of its good mechanical properties, good thermal stability, low dielectric constant, excellent hydrolytic resistance, and low moisture absorption.

• 出版日期2009-3-15