Effect of Radiation On Dosimetric and Optical Properties of Dyed Pva/Ch and Dyed Pvb/Ch Blends

TL;DRAbstract

Crystal violet doped polyvinyl alcohol blended with chloral hydrate (CV doped PVNCH) and methyl green doped polyvinyl butyral blended with chloral hydrate (MeG doped PVBICH) films were prepared by solvent casting method. The blends were irradiated with y radiation at doses of up to 110 kGy. The dosimetric and optical characteristics of the irradiated and unirradiated polymer blends were studied using UVVis- NIR and Raman Spectrometer. The CV doped PVNCH blends change colour from violet to blue at high dose (40 to 60 kGy) before bleaching at higher doses due to the formation of acid by radiation induced dechlorination of CH. The absorption spectra was measured and analysis spectrometrically. The absorbance at the absorption band at 590 nm, the characteristic of violet colour, decreases with increasing dose. The dose sensitivity Do increases where the values were 54.6, 81.9,84.0 and 117.6 kGy for CH concentration at 2.0, 3.0,4.0 and 5.0 g CH respectively. On the other hand, the absorbanc

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