Determination of monomer reactivity ratios using in situ FTIR spectroscopy for maleic anhydride/norbornene-free-radical copolymerization

Anthony J. Pasquale, Timothy Edward Long

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Monomer reactivity ratios for maleic anhydride (MAH) and norbornene (Nb) free-radical copolymerizations were estimated by using a linear graphical method, which is based upon the terminal model developed by Mayo and Lewis. Reactions were performed by using optimized reaction conditions that were previously determined. MAH/Nb copolymerizations (3 mol % AIBN initiator, 60% solids in THF, 65°C, 24 h). Copolymerization data were collected via in situ FTIR to low degrees of conversion (∼ 10%) for copolymerizations of MAH and Nb. The following five different MAH/Nb comonomer feed molar ratios were analyzed: 40/60, 45/55, 50/50, 55/45, and 60/40. Conversion data that were measured with in situ FTIR were employed in the rearranged copolymer composition equation to estimate MAH and Nb reactivity ratios. Both of the reactivity ratios were determined to be near 0 (r MAH = 0-02, r Nb = 0.01), which was indicative of an alternating copolymerization mechanism. The highest observed rate constant for copolymerization was obtained at an equal molar concentration of monomers.

Original languageEnglish
Pages (from-to)3240-3246
Number of pages7
JournalJournal of Applied Polymer Science
Volume92
Issue number5
DOIs
Publication statusPublished - 2004 Jun 5
Externally publishedYes

Fingerprint

Maleic Anhydrides
Maleic anhydride
Free radicals
Copolymerization
Free Radicals
Monomers
Spectroscopy
2-norbornene
Rate constants
Copolymers
Chemical analysis

Keywords

  • Alternating
  • FTIR
  • Photoresists
  • Radical polymerization
  • Reactivity ratios

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Determination of monomer reactivity ratios using in situ FTIR spectroscopy for maleic anhydride/norbornene-free-radical copolymerization. / Pasquale, Anthony J.; Long, Timothy Edward.

In: Journal of Applied Polymer Science, Vol. 92, No. 5, 05.06.2004, p. 3240-3246.

Research output: Contribution to journalArticle

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