| 초록 |
PMDA-3, 4’ODA films were prepared from the poly(amic acid) by thermal imidization at various temperatures in the range of 200-400oC as shown in Figure 1. Molecular order and orientation in the films were characterized by wide-angle x-ray diffractions (WAXD). The water sorption behavior was investigated in detail by gravimetry using a Cahn microbalance, which was operated over 22-100% relative humidity (R.H.) at 25oC. In addition, some measurements were conducted in various temperatures of 5-60oC. The water sorption behavior was understood together with temperature, humidity, thickness, and morphological structure.
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