Abstract
We report a new polyurethane (PU) dielectric containing hyperbranched structures and metal nanoparticles. Silver nanoparticles were incorporated into the PU networks by using hyperbranched polyester (HBP) as a reductive template as well as the cross-linker. Simultaneously enhanced mechanical and dielectric properties were observed in the hyperbranched PU dielectrics. The branched macromolecular fractal provides a “covalent bridge” between the PU matrix and Ag nanoparticles, which contributed to the simultaneously enhanced mechanical and dielectric properties.
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