ISSN:
1434-6036
Keywords:
PACS. 82.70.-y Disperse systems - 64.70.Md Transitions in liquid crystals - 61.25.Hq Macromolecular and polymer solutions; polymer melts; swelling
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The compressibility modulus of a lamellar phase containing a neutral polymer guest molecule was measured directly using a surface force apparatus. The system studied consisted of sodium dodecyl sulphate (SDS), pentanol, water and polyethylene glycol (PEG) . The lamellar phase was induced from a micellar phase in situ via a confinement induced isotropic to lamellar phase transition. This avoided problems resulting from the viscosity and turbidity normally characteristic of these lamellar phase samples. Increasing the amount of PEG resulted in a marked decrease in the layer compressibility modulus indicating a decrease in the repulsive forces between the lamellae. The origin of such a phenomenon is discussed in terms of different mechanisms including depletion interactions, bridging interactions and modification of the electrostatic interaction between the lamellae by the polymer.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510050748
Permalink