Simultaneously Toughening and Stiffening Elastomers with Octuple Hydrogen Bonding.

ABSTRACT: Current synthetic elastomers suffer from the well-known trade-off between toughness and stiffness. By a combination of multiscale experiments and atomistic simulations, a transparent unfilled elastomer with simultaneously enhanced toughness and stiffness is demonstrated. The designed elastomer comprises homogeneous networks with ultrastrong, reversible, and sacrificial octuple hydrogen bonding (HB), which evenly distribute the stress to each polymer chain during loading, thus enhancing stretchability and delaying fracture. Strong HBs and corresponding nanodomains enhance the stiffness by restricting the network mobility, and at the same time improve the toughness by dissipating energy during the transformation between different configurations. In addition, the stiffness mismatch between th

SUBMITTER: Zhuo Y 

PROVIDER: S-EPMC11468028 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature