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Filipe E. Antunes, Luigi Gentile, Lorena Tavano, Cesare Oliviero Rossi
Rheological characterization of the thermal gelation of poly(N-isopropylacrylamide) and poly(N-isopropylacrylamide)co-Acrylic Acid
Appl. Rheol. 19:4 (2009) 42064 (9 pages)
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The combined effect of charged addition and molecular weight, Mw,
on the thermal gelation and gel dissolution of poly(Nisopropylacrylamide)
chains was explored by using Rheological techniques. The synthesized charged derivative is poly(N-isopropylacrylamide
co-Acrylic acid). The rheological behavior of the two macromolecules is clearly different: the thermal gelation
of the high Mw and charged macromolecule is much more accentuated. This suggests that the gelation at high temperatures
only occurs when the inter polymer aggregate distance is sufficiently short to allow polymer bridging; this situation
can be achieved by different approaches, such as increasing polymer concentration and increasing polymer persistence
length and polymer Mw.
► Cite this publication as follows:
Antunes FE, Gentile L, Tavano L, OlivieroRossi C: Rheological characterization of the thermal gelation of poly(N-isopropylacrylamide) and poly(N-isopropylacrylamide)co-Acrylic Acid, Appl. Rheol. 19 (2009) 42064.
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