Comparison between Polymer Diffusion and Chain Radical Termination Kinetics: The Importance of Polydispersity

Alessandro Faldi, Matthew Tirrell, Timothy P. Lodge

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The diffusion coefficient of labeled poly(methyl methacrylate) (PMMA) has been measured by forced Rayleigh scattering from solutions containing labeled polymer, matrix PMMA, and toluene. Several combinations of the labeled and matrix polymer molecular weights were used. The matrix polymer concentration was varied from 0 to 40% by weight. Under the assumption that the rate of chain termination is controlled by the diffusion of the chain radicals, the diffusion data have been compared with available data for the rate coefficient of termination of PMMA radicals measured over the same polymer concentration range. The comparison shows that the distribution of chain radical molecular weight has a pronounced influence on the kinetics of termination.

Original languageEnglish (US)
Pages (from-to)4176-4183
Number of pages8
JournalMacromolecules
Volume27
Issue number15
DOIs
StatePublished - Jul 1 1994

Fingerprint Dive into the research topics of 'Comparison between Polymer Diffusion and Chain Radical Termination Kinetics: The Importance of Polydispersity'. Together they form a unique fingerprint.

Cite this