Cellulose acetate obtained from Ravi Rayon Ltd. was fractionated into nine different fractions by fractional prec-ipitation using acetone as a solvent and water as a precipitant. For fractional precipitation, an apparatus is designed which gave better results. Using light scattering and viscometry methods, the relationship between moelcular weight and refractive index increment, second virial coefficient, radius of gyration and viscosity is developed. The integral and differential molecular weight distribution curves are also plotted.
N AHMAD ,K BALOCH ,
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