A new strategy to characterize the extent of reaction of thermoset elastomers

Antonio R. Webb, Jian Yang, Guillermo A. Ameer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


A new method for determining the extent of reaction of thermoset elastomers was developed based on equilibrium swelling and dynamic mechanical analysis (DMA). The extent of reaction was defined based on the molecular weight between crosslinks (Mc) of a polymer sample in relation to Mc at the onset of gelation and at complete reaction. The molecular weight between crosslinks was measured using equilibrium swelling, whereas rheology and DMA were used to determine the exact point of gelation and reaction completion, respectively. The extent of reaction of poly(1,8-octanediol-co-citrate) at various polymerization conditions was investigated and this method was used to study the relationship between mechanical properties, molecular weight between crosslinks, and extent of reaction.

Original languageEnglish (US)
Pages (from-to)1318-1328
Number of pages11
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Issue number4
StatePublished - Feb 15 2008


  • Dynamic mechanical analysis
  • Elastomers
  • Extent of reaction
  • Gelation
  • Rheology
  • Thermosets

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry


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