Abstract: The behavior of this new kind of star-shaped amphiphilic polymeric monomolecuar layer membrane was studied by the surface pressure-area(π-A) curves. It is found that the π-Acurves can be influenced by many factors such as the floating plate vertical or parallel to the compression direction, different diffusing time, and repeat compression times. We also studied stearic acid amphiphile plasticized the GPSMA monolayer.

Key words: St-DVB microgel/MMA amphiphilic copolymer, Diffusing time, Plastication