Table 1.

Yield, viscosity, degree of imidization (DI), and thermal properties of PMDA-ODA synthesized in water.

Yield (%)	Inherent Viscosity a (dL/g)	DI b (%)	Thermal Properties (°C)
			T5 c	T10 d	Tg e
97	0.15	95	476	513	352

^a Measured at a concentration of 0.5 g/dL in concentrated sulfuric acid at 30 °C. ^b Degree of imidization calculated from FT-IR spectra using Equation (1). ^c Temperature at which a specimen shows 5 wt % decomposition under N₂. ^d Temperature at which a specimen shows 10 wt % decomposition under N₂. ^e Glass transition temperature measured under N₂.