Dr. Chunming Liu
Ohio University’s Chemistry & Biochemistry Colloquium Series presents Dr. Chunming Liu on “Visualization of Single Polymer Growth by Magnetic Tweezers ” on Monday, Jan. 27, at 4:10 p.m. in Clippinger Laboratories 194.
Liu is an Assistant Professor in the Department of Polymer Science and Chemistry at University of Akron.
The host is Dr. Jixin Chen.
Abstract: The molecular weight distribution of polymers is affected by the heterogeneity of polymerization kinetics. To explore the origin of such heterogeneity, it is necessary to monitor the growth of individual polymer chains. Single polymer growth in ring-opening metathesis polymerization is visualized in real-time using magnetic tweezers. The end-to-end distance of a growing polymer chain exhibits unexpected stepwise increase behavior, which are attributable to the formation and unraveling of conformational entanglements. The microscopic properties of the entanglements appear to play a key role in determining the polymerization rates and the dispersion of polymerization rates among individual polymers.
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