Nature of Residual Unsaturation during Cure of Dimethacrylates Examined by CPPEMAS13C NMR and Simulation Using a Kinetic Gelation Model

G. P. Simon, P. E.M. Allen, D. J. Bennett, D. R.G. Allen Williams, E. H. Williams

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Abstract

Residual monomer, constrained and unconstrained, and pendant double bonds have been assayed by CPPEMAS13C NMR during the postgelation stages of the cure of ethylene glycol dimethacrylate. A simulation using a kinetic gelation model fitted the experimental values well and was extended to make predictions about the pregelation stage and the size and distribution of monomer pools. Estimations of cure by DSC did not correlate linearly with residual unsaturation, though they did so during the cure of tetrakis(ethylene glycol) dimethacrylate.

Original languageEnglish
Pages (from-to)3555-3561
Number of pages7
JournalMacromolecules
Volume22
Issue number9
DOIs
Publication statusPublished - 1 Sep 1989

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