2. Use the dataset of polystyrene provided in the table below and • Calculate molecular weight, A2 and radius of gyratio

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2 Use The Dataset Of Polystyrene Provided In The Table Below And Calculate Molecular Weight A2 And Radius Of Gyratio 1 (84.07 KiB) Viewed 105 times

2. Use the dataset of polystyrene provided in the table below and • Calculate molecular weight, A2 and radius of gyration of the polymer by preparing a Zimm plot • Explain the obtained data. • What is the importance of extrapolation of data to small angles and zero concentrations? Polystyrene concentration. 140° RL 0.9 1.8 3.58 5.34 7.0 8.9 10/cm x R(O) measured at different angles 45 60° 750 90° 110° 1.623 1.632 1.644 1.699 1.611 2.567 2.655 2.687 2.701 2.712 3.465 3.435 3.499 3.673 3.378 3.989 3.965 3.995 4.023 4.122 4.095 4.106 4.320 4.235 4.204 4.244 4.309 4.301 120° 1.601 2.501 3.345 3.987 4.235 4.210 1.595 2.3.45 3.234 3.721 4.012 We will use a 660 nm wavelength light (or lo) for this problem dide = 0.10 mg Rayleigh ratio for the solvent used: 1.207 x 10m Refractive index for the solvent: 1.4898. K-optical constant (depends on the refractive index, ne of the pure solvent) corc-polymer concentration k(used in the plot) - arbitrary mathematical constant added to provide spacing between curves (no physical meaning). For consistency, let us take it as 75 in this question RO) or AR-Rayleigh's ratio e-scattering angle