▎ 摘　　要

Nanocomposites based on waterborne poly(urethane-urea)s (NWPUU) containing hydrophilic montmorillonite (MMT) clay, reduced graphene oxide (rGO) or MMT/rGO hybrids were produced by a green synthesis method. Polymer matrices were based on poly(ethylene glycol-block-propylene glycol) (PEG-b-PPG) (with different contents of PEG-based segments), poly(propylene glycol) (PPG), isophorone diisocyanate (IPDI), dimethylolpropionic acid (DMPA) and hydrazine. Aqueous dispersions were characterized in terms of particle hydrodynamic diameter (D-H) and rheological parameters and respective cast films were investigated by X-ray diffraction (XRD), low-field nuclear magnetic resonance (NMR) relaxometry and Fourier-transform infrared spectrometry (FTIR). Pseudoplastic dispersions with D-H < 200 nm were stable for more than 12 months. The formation of exfoliated structures suggested the homogeneous nanodispersion of MMT silicate layers and rGO nanosheets. MMT/rGO synergism and layer-to-layer interactions suggested segregation of phases. Hydrogen bonds between polar groups of nanoloads and rigid segments of WPUU influenced the structure and molecular dynamics of the chains. [GRAPHICS]