| 초록 |
Polyimide nanocomposites containing epoxy functionalized octavinylpentacyclo(octasiloxane)(Epoxy-POSS) have been prepared by polymerization of 4,4'-oxydianiline (ODA), 1,2,4,5-benzenetetracarboxylic dianhydride (PMDA), epoxy-POSS. We incorporated epoxy-POSS into the polyimide matrix to lower dielectric constant (low-k). We prepared epoxy-POSS polyimide nanocomposites as varying the epoxy-POSS contents. When contents of the epoxy-POSS in the nanocomposites are 0, 3, 6, 9 wt%, we denote them PI, PI3P, PI6P, PI9P, respectively. The reduction in the dielectric constant of the PI-POSS nanocomposites can be explained in terms of the free volume increase by the presence of the POSS-tethers network resulting in a loose PI structure. |
