Estimation of the Generation and the Weight Fraction of Dense Polymer Regions in Heterogeneous Hydrogels

Alveroglu E., YILMAZ Y.

MACROMOLECULAR CHEMISTRY AND PHYSICS, vol.212, no.14, pp.1451-1459, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 212 Issue: 14
  • Publication Date: 2011
  • Doi Number: 10.1002/macp.201100161
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1451-1459
  • Istanbul Technical University Affiliated: Yes


The internal structure of polyacrylamide gels consists of polymer-dense regions with different densities, which are denoted as "blobs". The density difference between these blobs decreases when a gel is doped with charged molecules. When a small potential is applied between the ends of such a gel, ionic charge carriers result in a current. A theoretical approach is developed to estimate the weight fraction and the number of blob generation. The current decreases with time as a series of exponentially decreasing terms where the exponent and the multiplier of each term measure the density of the blob and the weight fraction of the corresponding blob generation.