Adaptation of bulk constitutive equations to insoluble monolayer collapse at the air-water interface

A constitutive equation based on stress-strain models of bulk solids was ad apted to relate the surface pressure, compression rate, and temperature of an insoluble monolayer of monodendrons during collapse at the air-water int erface. power Law relation between compression rate and surface pressure an d an Arrhenius temperature dependence of the steady-state creep rate were o bserved in data from compression rate and creep experiments in the collapse region. These relations were combined into a single constitutive equation to calculate the temperature dependence of the collapse pressure with a max imum error of 5 percent for temperatures ranging from 10 degrees to 25 degr ees C.