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Polyelectrolyte complex formation: Role of a double hydrophilic polymer
Author(s) -
Dautzenberg Herbert
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20000901)201:14<1765::aid-macp1765>3.0.co;2-w
Subject(s) - polyelectrolyte , ethylene oxide , polymer chemistry , side chain , chemistry , polymer , sulfonate , styrene , flocculation , viscometer , chemical engineering , materials science , copolymer , organic chemistry , sodium , composite material , viscosity , engineering
Polyelectrolyte complex (PEC) formation between a double hydrophilic polymer DHP‐MA, consisting of a methacrylic backbone and ethylene oxide side chains and poly(diallyldimethylammonium chloride) (PDADMAC) samples of different molecular weights were studied by static light scattering and viscometry. PEC formation took place on a molecular level. The findings obtained adding DHP‐MA to the polycation solutions suggest a uniform distribution of DHP‐MA over all PDADMAC chains. The masses of the PECs are strongly correlated to the molecular weights of the PDADMAC samples. Flocculation normally observed in PEC formation approaching the 1 : 1 mixing ratio is completely suppressed by the ethylene oxide side chains. Even subsequent addition of higher amounts of salt did not cause remarkable secondary aggregation. These stabilizing effects could also be achieved using DHP‐MA as admixture in PEC formation between Na‐poly(styrene sulfonate) and PDADMAC.