Journal
ADVANCES IN COLLOID AND INTERFACE SCIENCE
Volume 122, Issue 1-3, Pages 67-77Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cis.2006.06.013
Keywords
polymer monolayers; surface rheology; FT-rheology; non-linear regime; elasto-plastic behavior
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The linear regime (LR) of viscoelastic behavior has been found to be limited to rather small values of strain, well below the strains found in many technological processes. A Fourier-transform method is described for analyzing the surface rheology data obtained in insoluble Langmuir polymer monolayers beyond the LR. In the concentrate regime, the monolayers show a transition from elastic to plastic behavior, which is characterized by high irreversibility. A simple 2-D rubber model is presented that describes the behavior of the monolayers in the non-linear region not too far from the end of the LR. (c) 2006 Elsevier B.V. All rights reserved.
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