The adhesion of supported polymer thin fi lms is predominantly infl uenced by the substrate-fi lm interfacial properties. Utilizing steered molecular dynamics simulations, here we uncover that the cohesive noncovalent forces between polymer chains in the fi lm also have a signifi cant effect on the adhesive properties of supported fi lm. We demonstrate that weaker interchain interactions, all e...

The surface instability of monolayer graphene supported by a soft (polymer) substrate under equal-biaxial compression has been explored through large scale coarse-grained molecular simulations. Regardless of the interfacial adhesion strength between the graphene and the substrate, herringbone wrinkles have always been observed due to their lowest energy status, compared with the checkerboard, h...

Poly(ethylene glycol) (PEG)-armed Ru(II)-bearing microgel-core star polymer catalysts were used for the transfer hydrogenation of ketones. The star catalysts (Ru(II)-PEG Star) were one-pot synthesized by ruthenium-catalyzed living radical polymerization of poly(ethylene glycol) methyl ether methacrylate (PEGMA) and a sequential linking reaction with ethylene glycol dimethacrylate (1) and diphen...

1. Introduction Our understanding of polymer dynamics has greatly improved due to the reptation model and the scaling ideas. [1] According to scaling and reptation theory, the diffusion coefficient in semidilute or concentrated regimes is related to the molar mass and polymer concentration by D ~ M-2 c-1.75 and D ~ M-2 c-3 for good-solvent and θ-solvent conditions, respectively. In a limited ra...