Thompson, Russell B.Rasmussen, Kim O.Lookman, Turab2021-11-182021-11-182004https://doi.org/10.1021/nl048407fhttp://hdl.handle.net/10012/17711This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by publisher. To access the final edited and published work see https://doi.org/10.1021/nl048407fWe predict a diblock copolymer melt in the lamellar phase with added spherical nanoparticles that have an affinity for one block to have a lower tensile modulus than a pure diblock copolymer system. This weakening is due to the swelling of the lamellar domain by nanoparticles and the displacement of polymer by elastically inert fillers. Despite the overall decrease in the tensile modulus of a polydomain sample, the shear modulus for a single domain is unaffected by fillers.enblock copolymersnano compositesself-consistent field theoryArticle