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(a) Storage modulus (E’) and loss factor (tanδ) of the epoxy (1) and epoxy filled with 0.05 wt. % of CNT (2), 0.1 wt. % of HN (3), and 0.3 wt. % of CNF (4) vs. temperature before the hydrothermal aging; (b) glass transition temperature (Tg) vs. filler weight fraction for the materials studied (dots—experimental data, line—polynomial approximation).
