TY - JOUR
T1 - Poly(vinylpyrrolidone) as dispersing agent for cerium-gadolinium oxide (CGO) suspensions
AU - Marani, Debora
AU - Sudireddy, Bhaskar Reddy
AU - Nielsen, Lotte
AU - Ndoni, Sokol
AU - Kiebach, Wolff-Ragnar
PY - 2016
Y1 - 2016
N2 - The behaviour of selected poly(vinylpyrrolidone)
grades to act as dispersant for ethanol-based ceriumgadolinium
oxide suspensions was investigated and related
to the molecular weight characteristics. The number,
weight, and z-average molecular weights Mn, Mw, and Mz
were determined by gel permeation chromatography and
then used in a numerical method to evaluate the viscosity
average molecular weight (Mv) via an empirically modified
Mark–Houwink–Sakurada (MHS) equation. The MHS
equation parameters (a and K) and the polydispersity correction
factor (qMHS) were also evaluated. Three grades
with different molecular weight features were selected and
further studied as dispersants by means of rheology.
Despite the differences, only slight shifts in the amount of
polymer required for achieving fully stabilized dispersions
were observed, whereas comparable packing properties
were obtained. This was explained as an effect of the
polydispersity, expressed as qMHS.
AB - The behaviour of selected poly(vinylpyrrolidone)
grades to act as dispersant for ethanol-based ceriumgadolinium
oxide suspensions was investigated and related
to the molecular weight characteristics. The number,
weight, and z-average molecular weights Mn, Mw, and Mz
were determined by gel permeation chromatography and
then used in a numerical method to evaluate the viscosity
average molecular weight (Mv) via an empirically modified
Mark–Houwink–Sakurada (MHS) equation. The MHS
equation parameters (a and K) and the polydispersity correction
factor (qMHS) were also evaluated. Three grades
with different molecular weight features were selected and
further studied as dispersants by means of rheology.
Despite the differences, only slight shifts in the amount of
polymer required for achieving fully stabilized dispersions
were observed, whereas comparable packing properties
were obtained. This was explained as an effect of the
polydispersity, expressed as qMHS.
U2 - 10.1007/s10853-015-9439-5
DO - 10.1007/s10853-015-9439-5
M3 - Journal article
VL - 51
SP - 1098
EP - 1106
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 2
ER -