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Polyoxyethylene di‐phosphonates as efficient dispersing polymers for aqueous suspensions
Author(s) -
Mosquet Martin,
Chevalier Yves,
Brunel Sylvain,
Guicquero Jean Pierre,
Le Perchec Pierre
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19970919)65:12<2545::aid-app24>3.0.co;2-y
Subject(s) - aqueous solution , polymer , colloid , phosphonate , chemical engineering , chemistry , polymer chemistry , viscosity , adsorption , inherent viscosity , suspension (topology) , intrinsic viscosity , materials science , organic chemistry , composite material , mathematics , homotopy , pure mathematics , engineering
Polyoxyethylenes having a di‐phosphonate functional group at one of their chain ends strongly adsorb on calcium carbonate particles in aqueous colloidal suspensions. An enhanced colloidal stability of such suspensions results with a concomitant drastic reduction of the viscosity of concentrated aqueous suspensions. The viscosity of a 20 wt % CaCO 3 colloidal suspension in water could be lowered to 2 mPa · s with low concentrations of polymer. The adsorption and viscosity reduction were studied as a function of the chemical nature of the end chain group and the polymer molecular weight. The di‐phosphonate group was found the most efficient anionic group when associated with a polyoxyethylene of polymerization degree larger than 20. The main features of this di‐block architecture of the polymer are discussed. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 2545–2555, 1997