Nanoheterogeneous structure formation in polyurethane elastomer — Poly(vinyl chloride) blends

An influence of chemical structure of poly(urethane-urea)s (PUU) hard segments based on aliphatic diamines and tolylene diisocyanate on structure and mechanical properties of PUU/poly(vinyl chloride) (PVC) blends has been studies. Intra-and intermolecular interactions in PUU and PUU/PVC systems was determined by FTIR. Structure asymmetry and weakening intermolecular interactions in PUU promotes an increasing the strength of interfacial H-bonding network in PUU/PVC compositions. Stronger donor-acceptor interactions provide a formation of nanoheterogeneous structure in the composites containing up to 30 wt % of PVC. The nanocomposite materials obtained have enhanced tensile properties.