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Results of advanced systems with a second prototype environmental chamber. (a) Example of evolution of bubble height with time over 3 h, at 0.7 atm and Texp = 63 °C. The colored curves are related to the time. (b) Plots of creep compliance over time. (c) Plots of height as a function of time showing strong correlation between humidity and creep compliance, leading to the conclusion that humidity acts as a plasticizer on PVAc films.
