Figure 1

The thickness-dependent elastic modulus of PS thin films at T = 295 K. The symbols circle and square are the experiment results for molar weight M _w = 1800 and 114 kg/mol, respectively [12]. The solid curve is plotted with the calculation results obtained from Equation 3, where the parameters that determine the T _g(h) in Equation 4 are c = 1/2, h ₀ = 5 nm, ΔC _pb = 30.7 J mol^-1 K^-1 = 1.919 J g atom^-1 K^-1, and T _gb = 375 K [4].