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Numerical simulation of water uptake for the gravimetric tests compared with the analytical model and experimental results, showing that the simulation fits the analytical model. (a) PBT at 35 °C. (b) PBT-GF30 at 35 °C. (c) PBT-GF30 at 70 °C. (d) PBT-GF30 at 130 °C.
