Adsorption of Polyvinylpyrrolidone over the Silica Surface: As Affected by Pretreatment of Adsorbent and Molar Mass of Polymer Adsorbate

Table 2

Some of the basic properties of PVP as provided by the manufacturer, BASF, Germany.

Sample	PVP K17	PVP K30	PVP K90
Mw/K dalton	7–11	45–55	1200–2000
Degree of dispersity	1.8 ± 0.2	2.3 ± 0.2	3.4 ± 0.3
Rel. viscosity, 1% in water	1.075–1.110	1.201–1.291	3.991–6.197