Preferential Mechanochemical Activation of Short Chains in Bidisperse Triblock Elastomers.

ABSTRACT: Polymer mechanochemistry offers attractive opportunities for using macroscopic forces to drive molecular-scale chemical transformations, but achieving efficient activation in bulk polymeric materials has remained challenging. Understanding how the structure and topology of polymer networks impact molecular-scale force distributions is critical for addressing this problem. Here we show that in block copolymer elastomers the molecular-scale force distributions and mechanochemical activation yields are strongly impacted by the molecular weight distribution of the polymers. We prepare bidisperse triblock copolymer elastomers with spiropyran mechanophores placed in either the short chains, the long chains, or both and show that the overall mechanochemical activation of the materials is dominate

SUBMITTER: Huo Z 

PROVIDER: S-EPMC10515626 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature