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(a) TGA curves for the pure PVA, PVA/TNFC film, and PVA/TNFC-Cu composite films; (b) the corresponding DTG curves. Peak temperatures (T max) of PVA, PVA/TNFC, PVA/TNFC-Cu0.4, PVA/TNFC-Cu0.5, PVA/TNFC-Cu0.6, and PVA/TNFC-Cu0.7 were 260, 263, 274, 275, 278, and 278°C, resp.).
