Depropagation kinetics of sterically demanding monomers: A pulsed laser size exclusion chromatography study

Zachary Szablan, Martina H. Stenzel, Thomas P. Davis, Leonie Barner, Christopher Barner-Kowollik

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24 Citations (Scopus)

Abstract

An effective propagation rate coefficient data, kp eff, for three sterically hindered monomers in wide temperature ranges and in both bulk and solvent systems was presented. It was demonstrated that the sterically hindered monomers DCHI, DBI, and DMI displayed relatively low ceiling temperatures. The data obtained for DCHI allowed for an estimation of the entropy and enthalpy of polymerization in bulk directly from the temperature dependent kpeff data. However, DBI displayed a different behavior when compared to DMI and DCHI, showing a significantly lower activation energy for the forward reaction and heat of polymerization accompanied by a relatively high entropy of polymerization.

Original languageEnglish
Pages (from-to)5944-5954
Number of pages11
JournalMacromolecules
Volume38
Issue number14
DOIs
Publication statusPublished - 12 Jul 2005
Externally publishedYes

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