----------------------------------------------------------- VISFIT, version 2.0 M.C. Lopez Martinez, F.G, Diaz Baņos, A. Ortega and J. Garcia de la Torre "Multiple Linear Least-Squares Fits with a Common Intercept: Determination of the intrinsic viscosity of macromolecules in solution" Journal of Chemical Education 80, 1036-1038 (2003) ----------------------------------------------------------- Title: Polystyrene/Toluene/25.0 C Name of output graphics file:outputgra-2.txt Flow time for solvent (s): 41.20 Concentration of initial solution (g/cm3): 0.016200 Volume of initial solution (cm3): 15.000 Flow time of initial solution (s): 76.30 Viscosimeter constants A (cm^2 s^-2) and B (cm^2): 1.77E-04 2.90E-02 Solvent density (g/cm^3) : 0.8623 Solvent viscosity (poise): 0.00568 Density of the initial solution (g/cm^3) : 0.8544 V Add time conc dens eta etarel Y YCAL Z ZCAL 0.00 76.30 0.016200 0.8544 0.011214 1.9739 60.11 60.47 41.97 42.11 1.00 73.77 0.015188 0.8549 0.010827 1.9056 59.63 59.67 42.46 42.46 3.10 67.60 0.012723 0.8561 0.009876 1.7384 58.04 57.72 43.46 43.30 2.90 63.46 0.011045 0.8569 0.009234 1.6253 56.61 56.40 43.97 43.88 8.00 56.73 0.008100 0.8583 0.008180 1.4398 54.30 54.07 45.00 44.89 10.00 52.32 0.006075 0.8593 0.007482 1.3169 52.17 52.47 45.31 45.59 Common Intercept = 47.68 Slope (Y) = 7.90E+02 Slope (Z) = -3.44E+02 Intrinsic viscosity: 47.68 cm^3/g Huggins const. k_H: 0.347 Kraemer const. k_K: 0.151 Sum of constants k_H+k_K: 0.499