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Viscosity of polystyrene is said to obey WLF relationship in the form log(T=Tg)(T)=51.6+(TTg)17.4(TTg) with Tg=100C. This relationship holds for melt temperature between 10C to 140C

Viscosity of polystyrene is said to obey WLF relationship in the form log(T=Tg)(T)=51.6+(TTg)17.4(TTg) with Tg=100C. This relationship holds for melt temperature between 10C to 140C above Tg. If the viscosity of a polystyrene is found to be 105Pas at 130C, (a) estimate the viscosity at 140C (b) plot the viscosity from 115C to 180C

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