enhancing compatibility in polyurethane blends with non-silicone polyurethane surfactants abstract: polyurethane (pu) blends offer a versatile platform for creating materials with tailored properties by combining the advantages of different polymers. however, the inherent immiscibility of many polymers often leads to phase separation and poor mechanical performance in pu blends. non-silicone polyurethane surfactants (nsps) provide a...