Effect of temperature on surface pressure-area isotherms and surface dilational moduli of poly(N-isopropyl acrylamide) monolayers spread at air-water interface

- A negative hysteresis of surface pressure by the compression-expansion cycle was observed, irrespective of temperature.
- Surface pressure in the semidilute regime increased with decreasing temperature.
- Surface pressure at the collapse state increased with increasing temperature.
- Surface dilational moduli in the semidilute regime increased with decreasing temperature.