Stable free radical polymerization kinetics of alkyl acrylate monomers using in situ FTIR spectroscopy: Influence of hydroxyl-containing monomers and additives

Jeremy R. Lizotte, Timothy Edward Long

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The homopolymerization and copolymerization of various alkyl acrylate monomers was studied under stable free radical polymerization (SFRP) conditions using in situ FTIR spectroscopy to monitor polymerization kinetics. The IR absorbance corresponding to the C-H deformation of the monomer (968 cm -1) was measured to determine monomer conversion in real-time fashion. The monomer disappearance profiles were subsequently converted to pseudo-first order kinetic plots. Altering the alkyl ester chain length and configuration did not reveal a significant trend in the resulting polymerization kinetics. However, addition of 2-hydroxyethyl acrylate (HEA) to a polymerization of n-butyl acrylate (nBA) substantially accelerated the rate of total monomer conversion, increasing the observed rate constant almost two times. 1H NMR spectroscopy also showed that the resulting HEA/nBAcopolymers were enriched with the HEA monomer. Moreover, a similar but enhanced effect was also observed upon the addition of small amounts of dodecanol to an n-butyl acrylate homopolymerization resulting in more than a doubling of the observed rate constant.

Original languageEnglish
Pages (from-to)692-698
Number of pages7
JournalMacromolecular Chemistry and Physics
Volume205
Issue number5
DOIs
Publication statusPublished - 2004 Mar 25
Externally publishedYes

Keywords

  • Hydrogen bonding
  • Infrared
  • Kinetics (polym.)
  • Radical polymerization
  • Spectroscopy

ASJC Scopus subject areas

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

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