DETERMINATION OF SOLVATION NUMBER OF NITROCELLULOSE IN THF BY QUANTITATIVE SEC

摘要

A quantitative method for the determination of the solvation number of macromolecule in solution is proposed. The method consists in measuring the specific refractive index increment (dn/dc) or the refractive index detector response constants of a given polymer solution with varying thermal histories. This method is applied to nitrocellulose solution in tetrahydofuran. The solvation number of the structural repeating unit of nitrocellulose equals fourteen, corresponding to 4 solvated solvent molecules are associating with each NO_2 group and other 2 molecules are associating with the two ether linkages.