A previously derived general equation, correlating the intrinsic viscosity of a polymer with M ̄a, M ̄w and M ̄z, is tested with experimental data. Its application for the calculation of average molecular weights is discussed. Good results have been obtained for the calculation of M ̄z using experimental [η], M ̄n, M ̄w together with a and K values of the Mark-Houwink-Sakurada equation taken from the literature. On the other hand, the calculation of M ̄a, M ̄w and M ̄z from experimental values of [η] in different solvents gives good results for M ̄w, whereas M ̄n, and particularly M ̄z may be very inaccurate in some cases. © 1991.
Manaresi P., Pilati F., Toselli M., Munari A., Guaita M., Chiantore O. (1991). A general intrinsic viscosity-molecular weight relationship for linear polydisperse polymers-2. Applicability to the evaluation of molecular weights. EUROPEAN POLYMER JOURNAL, 27(4-5), 381-384 [10.1016/0014-3057(91)90192-Q].
A general intrinsic viscosity-molecular weight relationship for linear polydisperse polymers-2. Applicability to the evaluation of molecular weights
Manaresi P.;Pilati F.;Toselli M.;
1991
Abstract
A previously derived general equation, correlating the intrinsic viscosity of a polymer with M ̄a, M ̄w and M ̄z, is tested with experimental data. Its application for the calculation of average molecular weights is discussed. Good results have been obtained for the calculation of M ̄z using experimental [η], M ̄n, M ̄w together with a and K values of the Mark-Houwink-Sakurada equation taken from the literature. On the other hand, the calculation of M ̄a, M ̄w and M ̄z from experimental values of [η] in different solvents gives good results for M ̄w, whereas M ̄n, and particularly M ̄z may be very inaccurate in some cases. © 1991.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
