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- W2086578683 abstract "Summary: Star-like dextran-graft-(polyacrylamide-co-polyacrylic acid) (D-g-(PAA-co-PAAc) copolymers in a salt form were obtained by alkaline hydrolysis of Dextran-graft-Polyacrylamide (D-g-PAA) samples. The internal structure of D-g-PAA insolution predetermined the reaction course and the conversion degree dependedupontheinitial architecture ofmacromolecules.Itwasshownthatmacromoleculesof D-g-(PAA-co-PAAc) acquired extended conformation because grafted chainsbecame greatly straightened when charged functional groups appeared. Nopolyelectrolyte effect for synthesized D-g-(PAA-co-PAAc) samples was registered.Star-like polyelectrolytes were proved to be more efficient matrices in comparisonwith linear anionic Polyacrylamide for silver nanoparticle in situ synthesis. Keywords: nanoparticles; non-linear polymers; polyelectrolytes Introduction Polyelectrolytes with non-linear architec-ture of macromolecules attract a warminterest due to their unusual propertiesarisen from peculiarities of their internalstructure in solution. This structuredepends on chemical nature of polymer,length of branches and distance betweenthem,amountanddistributionoffunctionalgroups along chains, construction mode ofbranched molecule. A lot of variableparameters (pH, ionic strength, chemicalnature and charge of counterions, temper-ature, etc.) affect the properties of poly-electrolytesolutionsotheyhavetobetakeninto account when non-linear ionic poly-mersareappliedastask-oriented materials.Nowadays linear Polyacrylic acid(PAAc) and Polyacrylamide (PAA) innonionic and anionic forms are widely usedin water treatment, biotechnology, medi-cine, pharmacology." @default.
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- W2086578683 date "2014-01-01" @default.
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- W2086578683 title "Star-Like Dextran-<i>graft</i>-(polyacrylamide-<i>co</i>-polyacrylic acid) Copolymers" @default.
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- W2086578683 doi "https://doi.org/10.1002/masy.201200115" @default.
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