Macromolecular Research, Vol.25, No.3, 249-254, March, 2017
Kinetics of In situ Robust Chain-Ends Crosslinked Polymeric Networks Formed Using Catalyst- and Solvent-Free Huisgen Cycloaddition Reaction
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At various temperatures, real time FTIR analysis was introduced to monitor the kinetics of the uncatalyzed Huisgen 1,3-dipolar azide-alkyne cycloaddition (AAC) without media, resulting in in situ robust polymeric networks crosslinked with triazoles at chain-ends. Second-order kinetic analysis was used to determine the rate constants for uncatalyzed AAC reaction. Electron-deficient alkynes carrying an α-carbonyl undergo a fast Huisgen reaction within a few hours without any catalysts, proportional to the temperature. Less electron-deficient alkynes led to the decrease of AAC reaction rate significantly, revealing that the AAC reaction rate depends on the molecular structure of alkynes center.
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