Molecular weight and charge density

Dependence of the viscosity on molecular weight and charge density of the polymer... 

The effect which polyelectrolyte adsorption has upon the surface charge (zeta potential) of fibres and fines is also important—particularly for retention—and both molecular weight and charge density of the adsorbed polyelectrolyte are known to affect the particle surface charge, although not always in an intuitively predictable way. 

Table I. Cationic celluloslc polymers investigated for molecular weight and charge density effects.

The polymers undergo structural changes from helix to random coil as the solution temperature increases, and eventually adopt P-sheet conformations at sufficiently elevated temperatures and concentrations. The conformational changes are strongly influenced by the molecular weight and charge density of the protein polymer. 

Table 3.8 Fixing agents categories, molecular weight and charge density (source BASF).

Fig. 6 Flocculation curves for excess sludge with Sedipur products (A, B, C, D), which are different concerning molecular weight and charge density...

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