抄録
The sublimation process of 1(2H)-phthalazinone (=Pht) (mp =183-184°C) dispersed in a poly (vinyl butyral)layer (layer thickness =10μm) was investigated by UV spectrometry. The sublimation ratio was measured by a decrease of UV absorbance whcih was proportional to the concentration of Pht. Pht sublimes rapidly at 130°C, while it does not sublime at room temperature. The rate-determining step was found to be not a sublimation process at the surface, but was a diffusion process of the molecule inside the polymer layer. The diffusi on constant measured was 1.3 × 10-9 cm2/s.
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