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Pastorczak M, Dominguez-Espinosa G, Okrasa L, et al. Poly(vinyl methyl ether) hydrogels at temperatures below the freezing point of water-molecular interactions and states of water. Colloid Polym Sci. 2014;292:1775-1784doi: 10.1007/s00396-014-3283-z.
Pastorczak, M., Dominguez-Espinosa, G., Okrasa, L., Pyda, M., Kozanecki, M., Kadlubowski, S., Rosiak, J. M., & Ulanski, J. (2014). Poly(vinyl methyl ether) hydrogels at temperatures below the freezing point of water-molecular interactions and states of water. Colloid and polymer science, 2921775-1784. https://doi.org/10.1007/s00396-014-3283-z
Pastorczak, Marcin, et al. "Poly(vinyl methyl ether) hydrogels at temperatures below the freezing point of water-molecular interactions and states of water." Colloid and polymer science vol. 292 (2014): 1775-1784. doi: https://doi.org/10.1007/s00396-014-3283-z
Pastorczak M, Dominguez-Espinosa G, Okrasa L, Pyda M, Kozanecki M, Kadlubowski S, Rosiak JM, Ulanski J. Poly(vinyl methyl ether) hydrogels at temperatures below the freezing point of water-molecular interactions and states of water. Colloid Polym Sci. 2014;292:1775-1784. doi: 10.1007/s00396-014-3283-z. Epub 2014 Jun 18. PMID: 25100897; PMCID: PMC4115186.
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Colloid Polym Sci. 2014;292:1775-1784. doi: 10.1007/s00396-014-3283-z. Epub 2014 Jun 18.

Poly(vinyl methyl ether) hydrogels at temperatures below the freezing point of water-molecular interactions and states of water.

Colloid and polymer science

Marcin Pastorczak, Gustavo Dominguez-Espinosa, Lidia Okrasa, Marek Pyda, Marcin Kozanecki, Slawomir Kadlubowski, Janusz M Rosiak, Jacek Ulanski

Affiliations

  1. Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland ; Institute of Experimental Physics, University of Warsaw, Hoza 69, 00-681 Warsaw, Poland.
  2. Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland ; Technological Lab of Uruguay (LATU), 6201 Av. Italia, 11500 Montevideo, Uruguay.
  3. Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
  4. Department of Chemistry, Rzeszow University of Technology, Powstancow Warszawy 6, 35-959 Rzeszow, Poland.
  5. Institute of Applied Radiation Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland.

PMID: 25100897 PMCID: PMC4115186 DOI: 10.1007/s00396-014-3283-z

Abstract

Water interacting with a polymer reveals a number of properties very different to bulk water. These interactions lead to the redistribution of hydrogen bonds in water. It results in modification of thermodynamic properties of water and the molecular dynamics of water. That kind of water is particularly well observable at temperatures below the freezing point of water, when the bulk water crystallizes. In this work, we determine the amount of water bound to the polymer and of the so-called pre-melting water in poly(vinyl methyl ether) hydrogels with the use of Raman spectroscopy, dielectric spectroscopy, and calorimetry. This analysis allows us to compare various physical properties of the bulk and the pre-melting water. We also postulate the molecular mechanism responsible for the pre-melting of part of water in poly(vinyl methyl ether) hydrogels. We suggest that above -60 °C, the first segmental motions of the polymer chain are activated, which trigger the process of the pre-melting.

Keywords: DSC; Dielectric spectroscopy; Molecular interactions; PVME hydrogels; Raman spectroscopy; Water pre-melting

References

  1. J Phys Chem B. 2007 Aug 30;111(34):10079-87 - PubMed
  2. J Phys Chem B. 2008 May 8;112(18):5611-5 - PubMed
  3. J Am Chem Soc. 1947 Aug;69(8):1896-1902 - PubMed

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