Synthesis and Dielectric Properties of Polyimide-Tethered Polyhedral Oligomeric Silsesquioxane (POSS) Nanocomposites via POSS-diamine

作者：Chyi‐Ming Leu, Yao-Te Chang, Kung‐Hwa Wei · 发表于：Macromolecules · 年份：2003 · DOI：10.1021/ma034743r · 被引用次数：269 · 研究领域：Silicone and Siloxane Chemistry、Synthesis and properties of polymers、Advanced ceramic materials synthesis

Polyimide-tethered polyhedral oligomeric silsesquioxane, (R 7 R‘Si 8 O 12 ) (POSS), nanocomposites with well-defined architectures are prepared by the copolymerization reaction of a new type of diamine monomer: POSS-diamine, 4,4‘-oxydianiline (ODA), and pyromellitic dianhydride (PMDA). This type of polyimide-side-chain-tethered POSS nanocomposite presents self-assembly characteristics when the amount of POSS exceeds10 mol %, as evidenced by transmission electron microscopy studies. Furthermore, POSS/polyimide nanocomposites have both lower and tunable dielectric constants, with the lowest value of 2.3, and controllable mechanical properties, as compared to that of pure polyimide.