TY - JOUR
T1 - Thermal transitions of poly(N-isopropylmethacrylamide) in aqueous solutions
AU - Salmerón Sánchez, M.
AU - Hanyková, L.
AU - Ilavský, M.
AU - Monleón Pradas, M.
N1 - Funding Information:
M.S.S and M.M.P acknowledge the support of CICYT through the MAT2002-04239-C03-03. M.S.S wants to acknowledge the support of the Universidad Politecnica de Valencia through the Programa de Incentivo a la investigacion for his stay at the Charles University in Prague during the preparation of the manuscript. L.H. thanks to the Grant Agency of the Charles University (grant No. 164/2001B) for financial support of this work.
PY - 2004/5
Y1 - 2004/5
N2 - Thermal transitions of poly(N-isopropylmethacrylamide) (PIPMAm) in aqueous solutions were studied in a wide temperature range from -100 to 60°C. The solutions of different polymer weight fractions (c=0.03-1) were investigated in cooling and heating scans of differential scanning calorimetry; four qualitatively different kinds of thermograms were identified in dependence of the fraction, c. The transitions are explained in a thermodynamic framework based on the phase diagram of the system. This diagram provides a complete understanding of thermal transitions in aqueous PIPMAm solutions as a function of c, in particular the existence of non-crystallizable water and the temperature induced phase transition that is due to the hydrophobic interaction in PIPMAm solutions.
AB - Thermal transitions of poly(N-isopropylmethacrylamide) (PIPMAm) in aqueous solutions were studied in a wide temperature range from -100 to 60°C. The solutions of different polymer weight fractions (c=0.03-1) were investigated in cooling and heating scans of differential scanning calorimetry; four qualitatively different kinds of thermograms were identified in dependence of the fraction, c. The transitions are explained in a thermodynamic framework based on the phase diagram of the system. This diagram provides a complete understanding of thermal transitions in aqueous PIPMAm solutions as a function of c, in particular the existence of non-crystallizable water and the temperature induced phase transition that is due to the hydrophobic interaction in PIPMAm solutions.
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U2 - 10.1016/j.polymer.2004.04.020
DO - 10.1016/j.polymer.2004.04.020
M3 - Article
AN - SCOPUS:2442693009
VL - 45
SP - 4087
EP - 4094
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 12
ER -