폴리아크릴산/H2O 혼합물에서 H2O 열적 거동에 미치는 이온의 영향

Lan Guan; Hongyan Xu; Dinghai Huang; Lan Guan; Hongyan Xu; Dinghai Huang

Polymer(Korea), Vol.34, No.4, 386-389, July, 2010

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폴리아크릴산/H2O 혼합물에서 H2O 열적 거동에 미치는 이온의 영향

The Effect of Ions on Thermal Behaviors of Water in Poly(acrylic acid)/Water Mixtures

Lan Guan^†, Hongyan Xu, Dinghai Huang

School of Materials Science and Engineering,Tianjin Key Laboratory of Composite andFunctional Materials Tianjin University, Tianjin, 300072. People’s Republic of China

Lan Guan^†, Hongyan Xu, and Dinghai Huang

School of Materials Science and Engineering,Tianjin Key Laboratory of Composite andFunctional Materials, Tianjin University, Tianjin, 300072. People’s Republic of China

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Thermal behaviors of water in the poly(acrylic acid) (PAA)/water mixtures with 0.1 M NaCl, HCl, and NaOH were investigated by DSC. It showed that adding ions in the mixtures affected the crystallization of water evidently. Compared with the PAA/water mixtures, the Tm of freezable bound water in the mixtures with ions moved to lower values and varied with different cations and anions, due to the stabilization or destabilization of the hydrogen-bonding hydration between polymers and water molecules through ionic hydration. The content of non-freezable bound water in the non-crystalline phase of the PAA/water mixtures with ions was not constant, it increased with total water content gradually, owing to the more binding sites created by ions. The ions could change the distribution of different states of water in the polymer aqueous solutions evidently.

Keywords:bound water;poly(acrylic acid);differential scanning calorimetry;ions

[References]

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[Referenced By]

[1] Shalaby SW, McCormick CL, “Water-Soluble Polymers”, ACS Symposium Series, American Chemical Society, Butler GB, Editor, Washington DC, Vol 467 (1991)

[2] Gref R, Nguyen QT, Rault J, Neel J, Eur. Polym. J., 28, 1007 (1992)

[3] Rodehed C, Rondy B, J. Appl. Polym. Sci., 32, 3309 (1986)

[4] Fushimi H, Ando I, Iijima T, Polymer, 32, 241 (1991)

[5] Takigami S, Kimura T, Nakamura Y, Polymer, 34, 604 (1993)

[6] Ping ZH, Nguyen QT, Chen SM, Zhou JQ, Ding YD, Polymer, 42(20), 8461 (2001)

[7] Nakamur K, Minagaw Y, Hatakeyam T, Hatakeyama H, Thermochim. Acta, 416(1-2), 135 (2004)

[8] Liu Y, Huglin MB, Polym. Int., 37, 63 (1995)

[9] Tranoudis I, Efron N, Contact Lens & Anterior Eye, 27, 193 (2004)

[10] Quinn FX, McBriety VJ, Wilson AC, Friends GD, Macromolecules, 23, 4576 (1990)

[11] Muta H, Miwa M, Satoh M, Polymer, 42(14), 6313 (2001)

[12] Gutmann V, Schmid R, Coord. Chem. Rev., 12, 263 (1974)

[13] Muta H, Kawauchi S, Satoh M, Colloid Polym. Sci., 282, 149 (2003)

[14] Shevkunov SV, Lukyanov SI, Leyssale JM, Millot C, Chem. Phys., 310, 97 (2005)

[15] Maeda Y, Kitano H, Spectrochim. Acta Part A, 51, 2433 (1995)

[16] Ostrowska-Czubenko J, Gierszewska-Druzynska M, Carbohydr. Polym., 77, 590 (2009)