Preparation and characterization of water-soluble polyacrylate sodium modified by organomontmorillonite

摘要

Water-soluble high intrinsicc viscosity organomontmorillonite modified polycrylate sodium (OMMT-modified PNaA) was prepared via an in situ intercalation adiabatic polymerization of sodium acrylate in the presence of OMMT. The FTIR and XRD analyses correspond to the OMMT-modified PNaA with exfoliated structure of OMMT. The influences of prepared conditions on intrinsic viscosity and dissolving time of the modified polymers had been investigated in this study. It was found that the incorporation of as little as 0.1 wt% of OMMT addes to PNaA matrix could be effective to enhance intrinsic viscosity of the modified PNaA. TGA and DSC studies confirmed the enhancement of the thermal stability of the OMMT-modified PNaA when compared with PNaA. Furhtermore, the solution behavior studies of the modified PNaA shoed the "antipolyelectrolyte" effect and high "antishearing" property. (c) 2008 Wiley Periodicals, Inc.