Novel Michael addition networks containing poly(propylene glycol) telechelic oligomers

Brian D. Mather, Kevin M. Miller, Timothy Edward Long

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Polypropylene glycol) oligomers with molecular weights ranging from 1000 to 8000 g·mol-1 were endfunctionalized with acetoacetate groups and subsequently crosslinked using carbon-Michael addition with PEG diacrylate. Gel fraction analysis, DMA, TGA, tensile, and swelling measurements were utilized to characterize the networks. The thermomechanical properties of the networks were analyzed with respect to the molecular weight between crosslink points (Mc) and the critical molecular weight for entanglement (Me). Sampling experiments during crosslinking revealed the evolution of molecular weight with time and monomer conversion. Kinetic analyses of the Michael additions were performed using 1H NMR spectroscopy, and the influence of basic catalyst and concentration was elucidated.

Original languageEnglish
Pages (from-to)1324-1333
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume207
Issue number15
DOIs
Publication statusPublished - 2006 Aug 2
Externally publishedYes

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Keywords

  • Acetoacetates
  • Entanglement
  • Mechanical properties
  • Michael addition
  • Networks

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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