Abstract
Atom-transfer radical polymerization (ATRP) of styrene catalyzed by chloro-substituted amine–bis(phenolate)iron complexes was investigated via online vis/NIR spectroscopy up to 6000 bar. Pressure significantly increases the rate of ATRP by enhancing both the equilibrium constant, KATRP, and the propagation rate coefficient, kp. The observed negative reaction volume, ΔrV(KATRP), is due to a stronger contraction of the ligand sphere for the Lewis-acidic FeIII complex compared to the FeII complex. Despite the enormous rate enhancement of ATRP, narrow molar mass distributions may be obtained even at very high pressure and thus very high rates.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.