10-16 June 2018
Dalhousie University
America/Halifax timezone
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POS-60 Polymer dynamics in a gel network: the effect of confinement (SMC Poster)

12 Jun 2018, 18:00
1h 30m
SUB McInnes Hall (Dalhousie University)

SUB McInnes Hall

Dalhousie University

Speaker

Mr Venketesh Thrithamara Ranganathan (Memorial University of Newfoundland)

Description

The dynamics of polymer chains in confined environment are relevant in understanding diffusion of macro-molecules in real systems such as biological cells. Macromolecular diffusion in cytoplasm exhibits a sharp reduction in diffusivity with increasing molecular weight; a sieving mechanism has been suggested for the same. We present pulsed field gradient NMR experimental studies of the diffusion of Polyethyleneglycol (PEG) in network-forming Agarose gels. The agarose gels are prepared by microfluidic methods that are thought to enhance the homogeneity of the network structure.The volume fraction of Agarose gel is used to control the network pore size, Rp, and the PEG molecular weight is used to vary the PEG radius of gyration Rg. Both are used to systematically vary the ratio Rg/Rp, and examine the polymer diffusivity as a function of this ratio.

Primary author

Mr Venketesh Thrithamara Ranganathan (Memorial University of Newfoundland)

Presentation Materials