1. A coumarin dimer probe of mechanochemical scission efficiency in the sonochemical activation of chain-centered mechanophore polymers
- Author
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Zachary S. Kean, Tatiana B. Kouznetsova, Gregory R. Gossweiler, Stephen L. Craig, and Gihan B. Hewage
- Subjects
chemistry.chemical_classification ,Dimer ,Dispersity ,Radical polymerization ,Metals and Alloys ,General Chemistry ,Polymer ,Photochemistry ,Catalysis ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,chemistry ,Yield (chemistry) ,Polymer chemistry ,Materials Chemistry ,Ceramics and Composites ,Functional polymers ,Methyl acrylate ,Bond cleavage - Abstract
Here we present a coumarin dimer (CD) mechanophore that, when embedded near the mid-chain of poly(methyl acrylate) polymers, activates under pulsed ultrasound conditions to yield coumarin chain-end functional polymers. Quantitative photochemical scission of the CD polymers provides a reference against which the activation efficiency of chain-centered mechanophores in polymers synthesized by controlled/living radical polymerization (CRP) can be assessed. Activation efficiency is characterized with respect to the polymer molecular weight (MW), polydispersity index (PDI), and distribution of mechanophores along the backbone.
- Published
- 2015