| 초록 |
Aromatic polyimides (PIs) have been used widely in the electronic device, semiconductor devices, and printed circuitry boards industries. In general, PI is thermally converted from precursor poly(amic acid) (PAA), because it is generally insoluble in any solvent. Recently, low temperature imidization is required to reduce the process time and temperature. In this study, 6FDA-ODA PAA was prepared using 4,4'-oxydianiline (ODA) and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) in a DMAc to form a 10.0 wt.% solution for study of low temperature imidization using various catalysts. After synthesis of PAA, various catalysts were added and analyzed by FT-IR, TGA. And the thermal imdization mechanism of 6FDA-ODA PAA has been analyzed by FT-IR spectroscopy. Further, 2D correlation analysis of FT-IR spectra was used to understand the molecular motion of segments in 6FDA-ODA during thermal imidization. |
