In this paper we report quasielastic light??scattering experiments of the compatible binary mixture of simple viscoelastic liquids made up of o??terphenyl as one component and newly synthesized model materials, 1, 1??di (paramethoxyphenyl)??cyclo??hexan and 1, 1??di (paramethoxyphenyl, metamethyl)??cyclohexan, as the other components. The measurements were done in a wide temperature range above T g (≂ T g+ 100 K) of the ...