Using Apparent Molecular Weight from SEC in Controlled/Living Polymerization and Kinetics of Polymerization

Guillaneuf, Yohann and Castignolles, Patrice (2008) Using Apparent Molecular Weight from SEC in Controlled/Living Polymerization and Kinetics of Polymerization. Journal of Polymer Science Part A - Polymer Chemistry, 46 3: 897-911. doi:10.1002/pola.22433


Author Guillaneuf, Yohann
Castignolles, Patrice
Title Using Apparent Molecular Weight from SEC in Controlled/Living Polymerization and Kinetics of Polymerization
Journal name Journal of Polymer Science Part A - Polymer Chemistry   Check publisher's open access policy
ISSN 0887-624X
Publication date 2008-02-01
Year available 2007
Sub-type Article (original research)
DOI 10.1002/pola.22433
Open Access Status
Volume 46
Issue 3
Start page 897
End page 911
Total pages 15
Editor Mitsuo Sawamoto
Place of publication United States
Publisher John Wiley & Sons, Inc.
Collection year 2009
Language eng
Subject 860199 Processed Food Products and Beverages (excl. Dairy Products) not elsewhere classified
090899 Food Sciences not elsewhere classified
Abstract Apparent molecular weights from size exclusion chromatography, that is molecular weights relative to standards of a nature different to that of the polymer sample being studied, are frequently used. We use calculations corresponding to realistic cases to provide guidelines for situations when, and to what extent, apparent molecular weights (MWs) can be meaningful. In controlled polymerization, we show how, without due care, use of apparent MW, could lead to the incorrect conclusion that the reaction was not controlled, whereas the true MWs would be close to theoretical values. We show here that the quality of the eluent as a solvent for the standard and the polymer sample is a good indication of the accuracy and the significance of the apparent polydispersity index. Accurate Mark-Houwink-Sakurada parameters are of limited availability, but the data about solvent quality available in handbooks or available from static light scattering measurements. Apparent Mn is of no use in controlled polymerization if simple simulations as performed in this work do not validate their use. The determination of transfer constants by the Mayo plot can be performed using apparent Mn without introducing any significant error, contrary to apparent weight-average molecular weight Mw or apparent ln number distribution. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 897-911, 2008
Keyword chain length distribution method
gel permeation chromatography
living polymerization
Mark-Houwink-Kuhn-Sakurada parameters
molecular weight distribution
polydispersity index
transfer constant
Q-Index Code C1
Q-Index Status Provisional Code

 
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Created: Sun, 19 Apr 2009, 12:35:15 EST by Emma Cushworth on behalf of School of Land, Crop and Food Sciences