ABSTRACT

Comments: The table gives the mass fraction of the polymer in the starting solution before diluting with pure water. dilH12 is measured as the heat released or absorbed upon the interaction of the mixtures with a large excess of water under stirring. The relative error in measuring the thermal effects did not exceed 2%. Polymer (B): maltodextrin 2005NIN Characterization: Mn/g.mol1 = 1475, Mw/g.mol1 = 13710, Aldrich Chem. Co., Inc., Milwaukee, WI Solvent (A): water H2O 7732-18-5

T/K = 313.15

m(A+B)'/g 28.850 27.346 28.801 29.752 30.587 29.850 39.874 39.484 wB' 0.290 0.290 0.300 0.398 0.404 0.398 0.508 0.481 mA"/g 15.938 15.857 15.902 15.916 15.855 15.905 14.805 14.976 dilH12/J −1.19 −1.23 −1.22 −1.68 −2.05 −1.82 −3.16 −2.80

continued

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continued

m(A+B)'/g 40.436 40.564 41.342 41.518 40.569 40.309 42.170 43.049 wB' 0.548 0.548 0.579 0.579 0.638 0.638 0.694 0.694 mA"/g 14.783 14.822 14.979 15.000 14.866 14.772 14.854 14.855 dilH12/J −3.64 −3.66 −4.49 −4.49 −5.89 −5.46 −6.69 −6.77

Comments: The table gives the mass of the polymer solution, the mass fraction of the polymer in this solution before diluting with pure water, and the mass of water added to this solution as used in the experiment of a mixing calorimeter. The superscripts ' and " designate the polymer solution or water as placed in the two parts of a mixing cell, respectively. dilH12 is therefore an extensive quantity obtained for the given masses in the table in the result of the mixing process. Polymer (B): maltodextrin 2005NIN Characterization: Mn/g.mol1 = 1140, Mw/g.mol1 = 8283, Aldrich Chem. Co., Inc., Milwaukee, WI Solvent (A): water H2O 7732-18-5

T/K = 313.15

m(A+B)'/g 38.488 37.672 39.794 38.575 40.396 40.276 41.918 41.314 wB' 0.404 0.393 0.501 0.511 0.548 0.543 0.608 0.608 mA"/g 15.014 14.953 14.779 15.472 15.057 15.030 15.038 15.039 dilH12/J −3.50 −2.62 −4.49 −3.90 −6.43 −6.03 −8,94 −8.48

m(A+B)'/g 42.519 42.182 41.810 42.727 wB' 0.649 0.637 0.700 0.700 mA"/g 14.871 14.953 14.801 15.021 dilH12/J −10.34 −9.61 −12.21 −12.19

Comments: The table gives the mass of the polymer solution, the mass fraction of the polymer in this solution before diluting with pure water, and the mass of water added to this solution as used in the experiment of a mixing calorimeter. The superscripts ' and " designate the polymer solution or water as placed in the two parts of a mixing cell, respectively. dilH12 is therefore an extensive quantity obtained for the given masses in the table in the result of the mixing process. Polymer (B): poly(propylene glycol) bis(2-aminopropyl ether) 2006INO Characterization: Mn/g.mol1 = 2000, Aldrich Chem. Co., Inc., Milwaukee, WI Solvent (A): water H2O 7732-18-5

T/K = at solid-liquid equilibrium

cA = 1 mol/dm3 was kept constant

wB 0.049 0.102 0.152 0.202 0.252 0.301 0.347 0.402 MH/(J/g) 31.3 61.5 86.5 108 126 141 152 161

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T/K = 298.15 solHB = 119 J/(g polymer)

Comments: The final concentration is about 0.75 g polymer/100 g solvent. Polymer (B): poly(1-vinyl-2-pyrrolidinone) 2011RA1 Characterization: Mw/g.mol1 = 10000, Aldrich Chem. Co., Inc., Milwaukee, WI Solvent (A): water H2O 7732-18-5

T/K = 298.15 solHB = 174.1 J/(g polymer) T/K = 303.15 solHB = 173.5 J/(g polymer) T/K = 308.15 solHB = 157.9 J/(g polymer) T/K = 318.15 solHB = 146.4 J/(g polymer)

Comments: The final polymer concentration is about 1.6 g/l. Polymer (B): poly(1-vinyl-2-pyrrolidinone) 2011RA1 Characterization: Mw/g.mol1 = 29000, Aldrich Chem. Co., Inc., Milwaukee, WI Solvent (A): water H2O 7732-18-5

T/K = 298.15 solHB = 185.3 J/(g polymer) T/K = 303.15 solHB = 180.5 J/(g polymer) T/K = 308.15 solHB = 171.0 J/(g polymer) T/K = 318.15 solHB = 154.0 J/(g polymer)

Comments: The final polymer concentration is about 1.6 g/l. Polymer (B): poly(1-vinyl-2-pyrrolidinone) 2011RA1 Characterization: Mw/g.mol1 = 55000, Aldrich Chem. Co., Inc., Milwaukee, WI Solvent (A): water H2O 7732-18-5

T/K = 298.15 solHB = 192.7 J/(g polymer) T/K = 303.15 solHB = 191.6 J/(g polymer) T/K = 308.15 solHB = 177.0 J/(g polymer) T/K = 318.15 solHB = 165.9 J/(g polymer)

Comments: The final polymer concentration is about 1.6 g/l. Polymer (B): sodium carboxymethylcellulose 2011RA2 Characterization: Mw/g.mol1 = 23000, D.S. = 0.77, Hercules, Wilmington, DE Solvent (A): water H2O 7732-18-5

T/K = 298.15 solHB = 115.5 J/(g polymer)

water 308.15-348.15 3.3 −41.4 _______________________________________________________________________________

Polymer (B) Solvent (A) Enthalpy T-range Ref. ________________________________________________________________________

Cellobiose water solH 298 K 2008RAD water/dimethylsulfoxide solH 298 K 2008RAD ________________________________________________________________________

Gelatine water dilH12 318.15 1999CES ________________________________________________________________________

Maltodextrin water dilH12 318.15 1999CES ________________________________________________________________________

Penta(ethylene glycol) monooctyl ether water solH 298 K 2004DER ________________________________________________________________________

Poly(acrylic acid) water solH 298 K 2004DER water solHA(vap) 303-333 K 2006SMI ________________________________________________________________________

Poly(ether urethane) water solHA(vap) 298 K 2004SMI ________________________________________________________________________

Poly(ethylene glycol) water MH 298.15 2002JAB water dilH12 298.15 2002JAB water MH 298 K 2003JAB water H 2006ATT water MH 298 K 2009MOH ________________________________________________________________________

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Polymer (B) Solvent (A) Enthalpy T-range Ref. ________________________________________________________________________

Poly(ethylene oxide) water solHA(vap) 303-333 K 2006SMI water/sodium dodecyl sulfate H 298 K 2004SIL ________________________________________________________________________

Poly(ethylene oxide-bpropylene oxide-bethylene oxide) water MH 298 K 2002THU water/surfactant H 2004DEL water H 2004JAN water H 2010TSU ________________________________________________________________________

Poly(L-glutamic acid) water dilH12 2005GOD ________________________________________________________________________

Poly(N-isopropylacrylamide) water H 2003CHO water/surfactant H 2004LOH water H 2006DIN water H 2010DUB water H 2010SHE ________________________________________________________________________

Poly(N-isopropylacrylamide-co-acrylic acid) water H 2006WEN ________________________________________________________________________

Poly(styrene oxide-bethylene oxide) water/sodium dodecyl sulfate H 298 K 2005CAS ________________________________________________________________________

Poly(vinyl methyl ether) water H 2007VAN ________________________________________________________________________

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Polymer (B) Solvent (A) Enthalpy T-range Ref. ________________________________________________________________________

Poly(2-vinyl-5-methyl1,3,4-oxadiazole) water MH 298.15 2006KIZ _______________________________________________________________________________

Poly(1-vinyl-2-pyrrolidinone) water/ethanol solHB 298.15 2011RA1 ________________________________________________________________________

Sodium carboxymethylcellulose water dilH12 298.15 2009SAF ________________________________________________________________________

Sodium carboxymethylstarch water dilH12 298.15 2009SAF ________________________________________________________________________

Starch water dilH12 298.15 2009SAF ________________________________________________________________________

________________________________________________________________________ 5.4. References 1999CES Cesaro, A., Cuppo, F., Fabri, D., and Sussich, F., Thermodynamic behavior of mixed

biopolymers in solution and in gel phase, Thermochim. Acta, 328, 143, 1999. 2002JAB Jablonski, P., Kalorimetrische Untersuchungen des Systems Polyethylenglykol/

Wasser, Dissertation, Gerhard-Mercator-Universität Gesamthochschule Duisburg, 2002.