Raman spectroscopic study of the structure of water in aqueous solutions of amphoteric polymers

Physical Chemistry Chemical Physics : PCCP
Hiromi KitanoMakoto Gemmei-Ide

Abstract

Methacrylic acid (MA) and [3-(methacryloylamino)propyl]trimethylammonium chloride (MAPTAC) were polymerized to give amphoteric copolymers with various compositions. The structure and H-bonding of water in an aqueous solution of the copolymer were analyzed using the contours of the O-H stretching in the polarized Raman spectra. For comparison, the H-bonded network structure of aqueous solutions of homopolymers (polyMA and polyMAPTAC) was also examined. From the relative intensity of the collective band (C value) corresponding to a long range coupling of the O-H stretching in the aqueous polymer solutions, the number of H-bonds disrupted due to the presence of one monomer residue of the polymers (Ncorr) was determined. The Ncorr value for polyMA was largely positive, and with an increase in the content of the MAPTAC residue, the Ncorr value became smaller, and after passing a minimum (which was still slightly positive) at a roughly equivalent molar ratio, the Ncorr value increased again. This is in significant contrast with the larger positive Ncorr values for the homopolymers (both polyMA and polyMAPTAC), and other ordinary polyelectrolytes such as sodium polyethylenesulfonate, poly-L-lysine hydrobromide and sodium polyacrylate....Continue Reading

References

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Dec 5, 2003·Journal of Colloid and Interface Science·Hiromi KitanoKohei Takaha
Feb 22, 2005·Journal of Colloid and Interface Science·Hiromi KitanoMakoto Gemmei-Ide
Apr 9, 2005·Macromolecular Bioscience·Hiromi KitanoMasaru Tanaka
Dec 1, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Hiromi KitanoYoshiyuki Yokoyama
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Citations

Jun 25, 2010·Journal of Biomaterials Science. Polymer Edition·Hiromi Kitano, Makoto Gemmei-Ide
Mar 10, 2017·Journal of Biomaterials Science. Polymer Edition·Kazuhiko IshiharaKyoko Fukazawa
Sep 19, 2007·Macromolecular Bioscience·Hiromi KitanoMasaru Tanaka
Nov 10, 2009·The Journal of Physical Chemistry. a·M PaolantoniA Laganà

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