Light Scattering results on polyacrylamide networks show that the scattered intensity changes as different positions of a sample are probed. The scattered intensity from gels, measured by averaging through many different positions, was found to be much larger than the intensity scattered by the equivalent polymer solution. This excess arises from the frozen-in fluctuations due to the presence of cross-links. This additional structure in gels can be enhanced or reduced with conditions of preparation. Modeling a gel by a random network of springs is presented. The resulting scattering properties mimic real gel behavior.
|Journal||International Journal of Polymer Analysis and Characterization|
|Publication status||Published - 1995|