Viscosity and Spinnability of Potassium Polymetaphosphate Aqueous Solutiont

Abstract

Rheological properties of polyelectrolytes of the inorganic compound type have been investigated.
When the KPOs was dissolved in aqueous solution of NaPO3 or NaCl, there appeared two maxima in curves of viscosity and spinnability vs. time. From the relatienship between the maximum value and the concentration or the weight ratio (K Na), it has been found that when the molecular ratio of KPOs to added salt was 1 to 3, 4, 6, 8 and 12 mol, distinctive fea re were observed in the viscosity and spinnability. It is presumed that the viscosity and spin abihty of KPO3 aqueous solutions were closely related to the natureof non-counter io the contribution of branched chains, and especially to the coodination number of bound ions.
Kinetic studies of the degradation process of KPO3 aqueou solution showed that the relationship between velocity censtant k and 1 T (Arrhenius plots) con isted of two straight lines. From the lopes of the lines, the activation energy was evaluated to be 20rv40 kcal mol.