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Published December 25, 2012 | Published + Supplemental Material + Accepted Version
Journal Article Open

Application of ^1H DOSY for Facile Measurement of Polymer Molecular Weights


To address the practical issues of polymer molecular weight determination, the first accurate polymer weight-average molecular weight determination method in diverse living/controlled polymerization via DOSY (diffusion-ordered NMR spectroscopy) is reported. Based on the linear correlation between the logarithm of diffusion coefficient (log D) and the molecular weights (log M_w), external calibration curves were created to give predictions of molecular weights of narrowly dispersed polymers. This method was successfully applied to atom transfer radical polymerization (ATRP), reversible addition–fragmentation chain transfer (RAFT), and ring-opening metathesis polymerization (ROMP), with weight-average molecular weights given by this method closely correlated to those obtained from GPC measurement.

Additional Information

© 2012 American Chemical Society. Received: August 7, 2012. Revised: October 11, 2012. Published: December 4, 2012. Financial support by NIH (R01 GM031332-28) is acknowledged. The authors thank Marc M. Baum at the Oak Crest Institute for generously providing Bruker 300 MHz NMR for diffusion experiments. We also thank Prof. Paul G. Williard at Brown University for constructive advices.

Attached Files

Published - ma301666x.pdf

Accepted Version - nihms426718.pdf

Supplemental Material - ma301666x_si_001.pdf


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