Two commercial samples of PVA were subjected to determine the supermolecular structure formation in aqueous media, by tight scattering and viscometric method. Solutions of various concentrations were aged upto 80 days and then, the intrinsic viscosity [eta], weight average molecular weight (Mw), radius of gyration (Rg2)1/2 were determined. From this, the extent of supermolecular formation of fresh solutions as well as the aged solutions was determined. It was found that supermolecular formation occurs to a lower degree during aging, and it increases with the concentration of the aging solution.
N AHMAD ,B AHMAD ,U KALSOOM ,A SAEED ,
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