Measurements of the light intensity transmitted through a cell containing a mixture of
a star polystyrene and methylcyclohexane (star-ps/myc) were made as a function of temperature.
The turbidity was calculated from the transmitted light intensity data and turbidity was
compared to the theoretical prediction of universal exponents υ
and γ, for correlation length amplitude ξ_{o}, and for turbidity amplitude
τ_{o}. The data were analyzed using a weighted nonlinear least squares routine with the
critical exponents υ and γ held constant at the predicted values of 1.24 and 0.63,
respectively. For a 0.155 mass fraction star-ps/mcy, the amplitude of correlation
length ξ_{o} was determined to be 0.452±0.005 nm
with a turbidity amplitude of τ_{o} = (84.8±0.6) x 10^{-6}cm^{-1}.
For a 0.145 mass fraction star-ps/mcy, the amplitude of correlation length ξ_{o} was
determined to be 0.597±0.005 nm and the turbidity amplitude to be
τ_{o} = (107.4±0.7) x 10^{-6}cm^{-1}. These values of
ξ_{o} are less than what has been measured for a linear polystyrene of the same
*M _{w}* in methylcyclohexane.