Polyoxyethylene di‐phosphonates as efficient dispersing polymers for aqueous suspensions

Fluidizing efficiency of comb-like superplasticizers: The effect of the anionic function, the side chain length and the grafting degree

“…9. This two step regime has also been observed on viscosity of calcite suspension with PEODP by Mosquet [29,30] for similar values. The conformation of adsorbed PEODP (and probably the surface-to-surface separation distance H) changes with the surface coverage.…”

“…2 Two commercial superplasticizers were also studied for comparison: a polynaphthalene sulfonate (Flube OS39 from Giovanni Bozzetto) as aqueous sodium salt and a polyethylene oxide diphosphonate with a PEO chain of 2000 g/mol. The structure of such superplasticizer is described by Mosquet [29,30].…”

“…According to R ac calculations (Table 1), the nine PCEs used in this study give a layer thickness of 2.6-3.0 nm for the PEO side chains 1100 g/mol, 4.1-4.6 nm for the PEO side chains 2000 g/mol and 7.9-8.4 nm for the PEO side chains 5000 g/mol. According to the literature, the effect of the side chain length on the dispersant effect is mainly felt when their molar mass varies between 0 and 1000 g/mol [7,29]. In other words, Kirby et al [7] had shown that the major effect on rheology was obtained with PCE side chain length between 0 and 700 g/mol while Mosquet et al [29] had also proven a rheological pronounced impact for the short side chains (b1000 g/mol) on PEO diphosphonate.…”

“…According to the literature, the effect of the side chain length on the dispersant effect is mainly felt when their molar mass varies between 0 and 1000 g/mol [7,29]. In other words, Kirby et al [7] had shown that the major effect on rheology was obtained with PCE side chain length between 0 and 700 g/mol while Mosquet et al [29] had also proven a rheological pronounced impact for the short side chains (b1000 g/mol) on PEO diphosphonate. The interparticle distance induced by the adsorbed PCP is thus quite sufficient to overcome the attractive force between at least a covered surface and an uncovered surface or between two covered surfaces.…”

Preparation of Nanoemulsions by Spontaneous Emulsification and Stabilization with Poly(caprolactone)‐b‐Poly(ethylene oxide) Block Copolymers

“…The shortest PEO block length to allow stabilization of the emulsions was n % 20 in every case. It should be noted that the same limit with regards to PEO block length was found for the stabilization of aqueous suspensions of mineral particles (calcium carbonate) by PEO diphosphonate dispersants [49,50].…”