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Time evolution of storage modulus and complex viscosity (a), and storage modulus as a function of frequency (b) for polypropylene (PP)-based nanocomposites (NT: pristine MWCNTs; MNT: surface modified MWCNTs; PP/3.0NT-A and PP/3.0MNT-A: PP-based composites containing pristine and modified MWCNTs, respectively, subjected to annealing). Adapted with permission from [72]. Copyright (2014) Elsevier.
