Abstract
Modifications due to the β-radiations of 204Tl on polystyrene in dilute benzene solutions have been studied by light scattering and viscometric measurements. Although the molecular weights of the samples are not affected, increase from 0.73 to 0.93 of the exponents of the Mark-Houwink equation was observed. From attempts to explain this high value of the exponent for irradiated polystyrene, it was concluded that the irradiated macromolecules show elongated shapes and higher chain flexibilities compared to unirradiated polystyrene.
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