3.4. Rheology measurement and tensile behavior3.4.1. Rubbery plateau modulusThe plateau modulus with the different formulations is shownin Table 5.The rubbery plateau region can decrease significantly with thedecrease in crystallinity and with the decreased entanglement andphysical cross-linking.It is noted (in Table 5) that the plateau modulus decreaseswith the increasing concentration of the plasticizer. This can beexplained by the effect of the plasticizer, which creates a free vol-ume and increases the weight (Me) between entanglements.The CA-BM formulation, compared to CA-DEP, has a lower rub-bery plateau modulus, due to the greater efficiency of the ionicliquid in the destruction of the crystalline region and molar volumeof BMIMCl.3.4.2. Tensile behaviorThe mechanical tensile tests were presented in Fig. 7 and con-ducted on the plasticized CA samples which were pressed into filmswith an average thickness of 100 m. Comparisons with neat CAfilms were conducted.These samples were conditioned in a constant relative humid-ity 30◦-45%RH and the mechanical properties were conducted in aclimatic tensile machine.With DEP and BMIMCl plasticized CA, comparatively to neat CAfilms, the increase of the concentration of plasticizers induces adecrease of the values of the stress. This decrease can be explained