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Static inhomogeneities and dynamic fluctuations of temperature sensitive polymer gels

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  • Shibayama, Mitsuhiro
  • Takata, Shin-ichi
  • Norisuye, Tomohisa

Abstract

The static inhomogeneities and dynamic fluctuations in polymer gels have been studied by light scattering as a function of the gel preparation temperature, Tprep, and the cross-link density. The light scattered intensity of polymer gels was decomposed to two parts; the intensities due to the thermal fluctuations, IF, and the frozen inhomogeneities, IC. The analysis employing ensemble (··E) and time averaging (··T) of light scattered intensity disclosed that IFT (the thermal fluctuations) depends neither on the cross-link density nor the temperature of gel preparation, but on the temperature of observation. On the other hand, ICE (the frozen inhomogeneities) is a function of both temperatures at preparation and at observation. This clearly shows that gel is matter with dynamic fluctuations superimposed on the static frozen inhomogeneities. The latter are built-in inhomogeneities due to topological constraints of the gel by cross-linking formation.

Suggested Citation

  • Shibayama, Mitsuhiro & Takata, Shin-ichi & Norisuye, Tomohisa, 1998. "Static inhomogeneities and dynamic fluctuations of temperature sensitive polymer gels," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 249(1), pages 245-252.
    • Handle: RePEc:eee:phsmap:v:249:y:1998:i:1:p:245-252
    DOI: 10.1016/S0378-4371(97)00472-X
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